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PCB cutting

PCB cutting

2012-12-18 by Richard

a neighbor gave one of these,

Roberts Quik-Cut Vinyl Tile Cutter 

can be found at Home Depot
Model # 30002
Internet # 100038849
Store SKU # 729019
 

$50.00

this is the best way to cut FR4 i have found, straight smooth edges, near no effort to cut 1/16 board, board does not skew either, has a cast aluminum frame, the blade is pinned at both ends giving increased leverage and keeps the blade from wandering and skewing the cut.

RD

Re: [Homebrew_PCBs] PCB cutting

2012-12-18 by Mark Schoonover

I've also have been looking for a better way to cut PCB material and I
think I've found it:

http://www.youtube.com/watch?v=3RyJHKz8LFU

Not only does it say "circuit board" on the outside box, it can also be
used to cut just about anything needed to make project boxes, etc.

73 - Mark Schoonover - KA6WKE
http://www.ka6wke.net




On Mon, Dec 17, 2012 at 9:37 PM, Richard <rdheiliger@...> wrote:

> Roberts Quik-Cut Vinyl Tile Cutter


[Non-text portions of this message have been removed]

Re: [Homebrew_PCBs] PCB cutting

2012-12-18 by Eldon Brown

RD,

Very good,

I am going to recommend this to some of my  PCB building friends.

Here is the HomeDepot URL:
http://www.homedepot.com/h_d1/N-5yc1v/R-100038849/h_d2/ProductDisplay?catalogId=10053&langId=-1&keyword=729019&storeId=10051#.UNA3TKrwilg


Regards,
Eldon Brown

73 - Eldon - WA0UWH - CN88xc - http://WA0UWH.blogspot.com/




On Mon, Dec 17, 2012 at 9:37 PM, Richard <rdheiliger@...> wrote:

> 729019


[Non-text portions of this message have been removed]

Re: [Homebrew_PCBs] PCB cutting

2012-12-18 by casy_ch@tbwil.ch

What a good idea! Thank you. Here it is available as well.

Vy 73 de Jean-Claude, HB3YDH


Am 18.12.2012 10:34, schrieb Eldon Brown:
>
> RD,
>
> Very good,
>
> I am going to recommend this to some of my PCB building friends.
>
> Here is the HomeDepot URL:
> http://www.homedepot.com/h_d1/N-5yc1v/R-100038849/h_d2/ProductDisplay?catalogId=10053&langId=-1&keyword=729019&storeId=10051#.UNA3TKrwilg
>
> Regards,
> Eldon Brown
>
> 73 - Eldon - WA0UWH - CN88xc - http://WA0UWH.blogspot.com/
>
> On Mon, Dec 17, 2012 at 9:37 PM, Richard <rdheiliger@... 
> <mailto:rdheiliger%40msn.com>> wrote:
>
> > 729019
>



[Non-text portions of this message have been removed]

Re: [Homebrew_PCBs] PCB cutting

2012-12-18 by Stefan Trethan

I've seen a similar cutter for wood laminate flooring but it didn't
have the second lever, just a single blade.
Also the blade went down into a slot, cutting a thin strip out of the
wood, a bit like a nibbler just much longer.

The mechanics of this vinyl tile cutter seem much more suitable, too
bad vinyl tile is not very popular here...

ST
Show quoted textHide quoted text
On Tue, Dec 18, 2012 at 6:37 AM, Richard <rdheiliger@...> wrote:
> a neighbor gave one of these,
>
> Roberts Quik-Cut Vinyl Tile Cutter
>
> can be found at Home Depot
> Model # 30002
> Internet # 100038849
> Store SKU # 729019
>
>
> $50.00
>
> this is the best way to cut FR4 i have found, straight smooth edges, near no effort to cut 1/16 board, board does not skew either, has a cast aluminum frame, the blade is pinned at both ends giving increased leverage and keeps the blade from wandering and skewing the cut.
>
> RD
>
>
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>

Re: [Homebrew_PCBs] PCB cutting

2012-12-18 by Steve

Richard,

Thanks for that recommendation. How does this cutter do if you want 
small pieces of 1/16in FR4? Seems that I often need a small board 
perhaps on the order on one inch square.

Thanks.

Steve K8JQ
Show quoted textHide quoted text
On 12/18/2012 12:37 AM, Richard wrote:
> a neighbor gave one of these,
>
> Roberts Quik-Cut Vinyl Tile Cutter
>
> can be found at Home Depot
> Model # 30002
> Internet # 100038849
> Store SKU # 729019
>   
>
> $50.00
>
> this is the best way to cut FR4 i have found, straight smooth edges, near no effort to cut 1/16 board, board does not skew either, has a cast aluminum frame, the blade is pinned at both ends giving increased leverage and keeps the blade from wandering and skewing the cut.
>
> RD
>
>
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>
>
>

Re: [Homebrew_PCBs] PCB cutting

2012-12-18 by Mitch Davis

On Tue, Dec 18, 2012 at 9:52 PM, Steve <steve65@...> wrote:
>
> Thanks for that recommendation. How does this cutter do if you want
> small pieces of 1/16in FR4? Seems that I often need a small board
> perhaps on the order on one inch square.

On the rare occasion I need to (I'm a PCB supplier) I usually use
tinsnips.  If I had to do it more often I'd get my hands on a hand
(ie, not air, not electric) nibbler.  Based on how nibblers I've used
in the past have gone, I think it would do a fantastic job on FR4.

Mitch.
http://tinyurl.com/hvpcbfaq

Re: PCB cutting

2012-12-18 by RDHeiliger

I make my board a bit oversize, don’t have to align toner print as accurately, then trim after etch and drill, have been able to trim off as little as 1/8 inch. 

RD 

[Non-text portions of this message have been removed]

RE: [Homebrew_PCBs] PCB cutting

2012-12-19 by Rick Sparber

Funny you should mention this. I had a few small circuit boards to cut up
just now and tried my sheet metal snips. It is a rather massive hand tool,
not the ones with the thin jaws. It cut through the FR4 easily and with good
control. When the ships are dull, it is easy to re-sharpen it.

Rick
Show quoted textHide quoted text
-----Original Message-----
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of Mark Schoonover
Sent: Monday, December 17, 2012 10:54 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] PCB cutting

I've also have been looking for a better way to cut PCB material and I think
I've found it:

http://www.youtube.com/watch?v=3RyJHKz8LFU

Not only does it say "circuit board" on the outside box, it can also be used
to cut just about anything needed to make project boxes, etc.

73 - Mark Schoonover - KA6WKE
http://www.ka6wke.net




On Mon, Dec 17, 2012 at 9:37 PM, Richard <rdheiliger@...> wrote:

> Roberts Quik-Cut Vinyl Tile Cutter


[Non-text portions of this message have been removed]



------------------------------------

Be sure to visit the group home and check for new Links, Files, and Photos:
http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links

Re: [Homebrew_PCBs] PCB cutting

2012-12-19 by casy_ch@tbwil.ch

Mark

You mean boxes to fit your reserve pcboards ???? hi3x

A very good idea this tool. I must have a look if it is available on 
this side of the pond.

Vy 73 de Jean-Claude, HB3YDH


Am 18.12.2012 06:53, schrieb Mark Schoonover:
>
> I've also have been looking for a better way to cut PCB material and I
> think I've found it:
>
> http://www.youtube.com/watch?v=3RyJHKz8LFU
>
> Not only does it say "circuit board" on the outside box, it can also be
> used to cut just about anything needed to make project boxes, etc.
>
> 73 - Mark Schoonover - KA6WKE
> http://www.ka6wke.net
>
> On Mon, Dec 17, 2012 at 9:37 PM, Richard <rdheiliger@... 
> <mailto:rdheiliger%40msn.com>> wrote:
>
> > Roberts Quik-Cut Vinyl Tile Cutter
>
> [Non-text portions of this message have been removed]
>
> 



[Non-text portions of this message have been removed]

RE: [Homebrew_PCBs] PCB cutting

2012-12-20 by Jeff Heiss

How about the Proxxon circular saw for cutting copper clad ($125)?  

 

Jeff

 

  _____  
Show quoted textHide quoted text
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of Rick Sparber
Sent: Wednesday, December 19, 2012 11:21 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: RE: [Homebrew_PCBs] PCB cutting

 

  

Funny you should mention this. I had a few small circuit boards to cut up
just now and tried my sheet metal snips. It is a rather massive hand tool,
not the ones with the thin jaws. It cut through the FR4 easily and with good
control. When the ships are dull, it is easy to re-sharpen it.

Rick

-----Original Message-----
From: Homebrew_PCBs@yahoogroups.com <mailto:Homebrew_PCBs%40yahoogroups.com>
[mailto:Homebrew_PCBs@yahoogroups.com
<mailto:Homebrew_PCBs%40yahoogroups.com> ]
On Behalf Of Mark Schoonover
Sent: Monday, December 17, 2012 10:54 PM
To: Homebrew_PCBs@yahoogroups.com <mailto:Homebrew_PCBs%40yahoogroups.com> 
Subject: Re: [Homebrew_PCBs] PCB cutting

I've also have been looking for a better way to cut PCB material and I think
I've found it:

http://www.youtube.com/watch?v=3RyJHKz8LFU

Not only does it say "circuit board" on the outside box, it can also be used
to cut just about anything needed to make project boxes, etc.

73 - Mark Schoonover - KA6WKE
http://www.ka6wke.net

On Mon, Dec 17, 2012 at 9:37 PM, Richard <rdheiliger@...
<mailto:rdheiliger%40msn.com> > wrote:

> Roberts Quik-Cut Vinyl Tile Cutter

[Non-text portions of this message have been removed]

------------------------------------

Be sure to visit the group home and check for new Links, Files, and Photos:
http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links





[Non-text portions of this message have been removed]

RE: [Homebrew_PCBs] PCB cutting

2012-12-20 by Rick Sparber

I'm sure it is a nice machine. But if my sheet metal snips do the trick, why
buy something else?

Rick
Show quoted textHide quoted text
-----Original Message-----
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of Jeff Heiss
Sent: Wednesday, December 19, 2012 6:21 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: RE: [Homebrew_PCBs] PCB cutting

How about the Proxxon circular saw for cutting copper clad ($125)?  

 

Jeff

 

  _____  

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of Rick Sparber
Sent: Wednesday, December 19, 2012 11:21 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: RE: [Homebrew_PCBs] PCB cutting

 

  

Funny you should mention this. I had a few small circuit boards to cut up
just now and tried my sheet metal snips. It is a rather massive hand tool,
not the ones with the thin jaws. It cut through the FR4 easily and with good
control. When the ships are dull, it is easy to re-sharpen it.

Rick

-----Original Message-----
From: Homebrew_PCBs@yahoogroups.com <mailto:Homebrew_PCBs%40yahoogroups.com>
[mailto:Homebrew_PCBs@yahoogroups.com
<mailto:Homebrew_PCBs%40yahoogroups.com> ] On Behalf Of Mark Schoonover
Sent: Monday, December 17, 2012 10:54 PM
To: Homebrew_PCBs@yahoogroups.com <mailto:Homebrew_PCBs%40yahoogroups.com>
Subject: Re: [Homebrew_PCBs] PCB cutting

I've also have been looking for a better way to cut PCB material and I think
I've found it:

http://www.youtube.com/watch?v=3RyJHKz8LFU

Not only does it say "circuit board" on the outside box, it can also be used
to cut just about anything needed to make project boxes, etc.

73 - Mark Schoonover - KA6WKE
http://www.ka6wke.net

On Mon, Dec 17, 2012 at 9:37 PM, Richard <rdheiliger@...
<mailto:rdheiliger%40msn.com> > wrote:

> Roberts Quik-Cut Vinyl Tile Cutter

[Non-text portions of this message have been removed]

------------------------------------

Be sure to visit the group home and check for new Links, Files, and Photos:
http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links





[Non-text portions of this message have been removed]



------------------------------------

Be sure to visit the group home and check for new Links, Files, and Photos:
http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links

Re: [Homebrew_PCBs] PCB cutting

2012-12-20 by A.Tahir DENGIZ

Proxxon circular saw is not powerfull enough. 
It has been tried one of my HAM friend.
It is only good for balsa wood for models.
A.Tahir DENGIZ, TA2T
Show quoted textHide quoted text
From: Jeff Heiss <jeff.heiss@...>
To: Homebrew_PCBs@yahoogroups.com 
Sent: Thursday, December 20, 2012 3:20 AM
Subject: RE: [Homebrew_PCBs] PCB cutting

  
How about the Proxxon circular saw for cutting copper clad ($125)? 

Jeff

_____ 

From: mailto:Homebrew_PCBs%40yahoogroups.com [mailto:mailto:Homebrew_PCBs%40yahoogroups.com]
On Behalf Of Rick Sparber
Sent: Wednesday, December 19, 2012 11:21 AM
To: mailto:Homebrew_PCBs%40yahoogroups.com
Subject: RE: [Homebrew_PCBs] PCB cutting

Funny you should mention this. I had a few small circuit boards to cut up
just now and tried my sheet metal snips. It is a rather massive hand tool,
not the ones with the thin jaws. It cut through the FR4 easily and with good
control. When the ships are dull, it is easy to re-sharpen it.

Rick

-----Original Message-----
From: mailto:Homebrew_PCBs%40yahoogroups.com <mailto:Homebrew_PCBs%40yahoogroups.com>
[mailto:mailto:Homebrew_PCBs%40yahoogroups.com
<mailto:Homebrew_PCBs%40yahoogroups.com> ]
On Behalf Of Mark Schoonover
Sent: Monday, December 17, 2012 10:54 PM
To: mailto:Homebrew_PCBs%40yahoogroups.com <mailto:Homebrew_PCBs%40yahoogroups.com> 
Subject: Re: [Homebrew_PCBs] PCB cutting

I've also have been looking for a better way to cut PCB material and I think
I've found it:

http://www.youtube.com/watch?v=3RyJHKz8LFU

Not only does it say "circuit board" on the outside box, it can also be used
to cut just about anything needed to make project boxes, etc.

73 - Mark Schoonover - KA6WKE
http://www.ka6wke.net/

On Mon, Dec 17, 2012 at 9:37 PM, Richard <mailto:rdheiliger%40msn.com
<mailto:rdheiliger%40msn.com> > wrote:

> Roberts Quik-Cut Vinyl Tile Cutter

[Non-text portions of this message have been removed]

------------------------------------

Be sure to visit the group home and check for new Links, Files, and Photos:
http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links

[Non-text portions of this message have been removed]




[Non-text portions of this message have been removed]

Re: [Homebrew_PCBs] PCB cutting

2012-12-20 by Mark Schoonover

I use metal snips for boards no bigger than 2" because anything longer and
the board starts to curve up or down depending on which side I need to use.
I would like to use PCB material for project enclosures too, just can't
justify the costs for even small enclosures.

On Wednesday, December 19, 2012, Rick Sparber <rgsparber@...> wrote:
>
>
> I'm sure it is a nice machine. But if my sheet metal snips do the trick,
why
> buy something else?
>
> Rick
>
> -----Original Message-----
> From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
> On Behalf Of Jeff Heiss
> Sent: Wednesday, December 19, 2012 6:21 PM
> To: Homebrew_PCBs@yahoogroups.com
> Subject: RE: [Homebrew_PCBs] PCB cutting
>
> How about the Proxxon circular saw for cutting copper clad ($125)?
>
> Jeff
>
> _____
>
> From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
> On Behalf Of Rick Sparber
> Sent: Wednesday, December 19, 2012 11:21 AM
> To: Homebrew_PCBs@yahoogroups.com
> Subject: RE: [Homebrew_PCBs] PCB cutting
>
> Funny you should mention this. I had a few small circuit boards to cut up
> just now and tried my sheet metal snips. It is a rather massive hand tool,
> not the ones with the thin jaws. It cut through the FR4 easily and with
good
> control. When the ships are dull, it is easy to re-sharpen it.
>
> Rick
>
> -----Original Message-----
> From: Homebrew_PCBs@yahoogroups.com <mailto:
Homebrew_PCBs%40yahoogroups.com>
> [mailto:Homebrew_PCBs@yahoogroups.com
> <mailto:Homebrew_PCBs%40yahoogroups.com> ] On Behalf Of Mark Schoonover
> Sent: Monday, December 17, 2012 10:54 PM
> To: Homebrew_PCBs@yahoogroups.com <mailto:Homebrew_PCBs%40yahoogroups.com>
> Subject: Re: [Homebrew_PCBs] PCB cutting
>
> I've also have been looking for a better way to cut PCB material and I
think
> I've found it:
>
> Craftsman Trak-Cut track saw w/ miter base
>
> Not only does it say "circuit board" on the outside box, it can also be
used
> to cut just about anything needed to make project boxes, etc.
>
> 73 - Mark Schoonover - KA6WKE
> http://www.ka6wke.net
>
> On Mon, Dec 17, 2012 at 9:37 PM, Richard <rdheiliger@...
> <mailto:rdheiliger%40msn.com> > wrote:
>
>> Roberts Quik-Cut Vinyl Tile Cutter
>
> [Non-text portions of this message have been removed]
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and
Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
> [Non-text portions of this message have been removed]
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and
Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
> 

-- 
73 - Mark Schoonover - KA6WKE
http://www.ka6wke.net


[Non-text portions of this message have been removed]

Re: [Homebrew_PCBs] PCB cutting

2012-12-20 by Duane C. Johnson

I use a paper guillotine.

http://en.wikipedia.org/wiki/Paper_cutter
The first picture.

I think they are about $50us

This works much better than tin snips.

Duane

-- 
     Home of the $35 Solar Tracker      Receiver
    http://www.redrok.com/led3xassm.htm      [*]
   Powered by             &#92;  &#92;     &#92;        //|
  Thermonuclear   Solar Energy from the Sun / |
Energy (the SUN)           &#92;  &#92;     &#92;  /  /  |
Red Rock Energy             &#92;  &#92;     /   /   |
Duane C. Johnson   Designer  &#92;  &#92;  /  &#92; /    |
1825 Florence St  Heliostat,Control,& Mounts |
White Bear Lake, Minnesota    === &#92;   / &#92;    |
USA      55110-3364                ===   &#92;   |
(651)426-4766        use Courier New Font &#92;  |
redrok@...     (my email: address)  &#92; |
http://www.redrok.com  (Web site)          ===

RE: [Homebrew_PCBs] PCB cutting

2012-12-20 by Rick Sparber

Mark,

I can see how that curving could crack vias and thin traces. 

Before I made my finger brake ( http://rick.sparber.org/smfb.pdf ), I used
aluminum "coil". It comes pre-painted on both sides with different colors
(your choice). The stuff bends with light finger pressure and cuts easily
with scissors. Yet when folded up into a small box, is plenty strong. Back
in Illinois, it was used to wrap wood on the outside of people's houses.
VERY resistant to weather. I bought a 50' x 1' wide roll about 25 years ago
and still have some left.

Rick
Show quoted textHide quoted text
-----Original Message-----
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of Mark Schoonover
Sent: Wednesday, December 19, 2012 9:41 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] PCB cutting

I use metal snips for boards no bigger than 2" because anything longer and
the board starts to curve up or down depending on which side I need to use.
I would like to use PCB material for project enclosures too, just can't
justify the costs for even small enclosures.

RE: [Homebrew_PCBs] PCB cutting

2012-12-20 by Rick Sparber

Duane,

I have one of these paper cutters but it did not work well for me. The small
board squirmed as I started to cut. I can see it working with larger boards.
So maybe for boards less than 2" use the sheers and greater than 2" use the
cutter.

Rick
Show quoted textHide quoted text
-----Original Message-----
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of Duane C. Johnson
Sent: Thursday, December 20, 2012 5:57 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] PCB cutting

I use a paper guillotine.

http://en.wikipedia.org/wiki/Paper_cutter
The first picture.

I think they are about $50us

This works much better than tin snips.

Duane

Re: [Homebrew_PCBs] PCB cutting

2012-12-20 by Duane C. Johnson

Hi Rick;

Rick Sparber <rgsparber@...> wrote:

 > I have one of these paper cutters but it did not work well
 > for me.  The small board squirmed as I started to cut.

I added "Rubberized Shelf Liner" to the bed. I glued
this stuff down with rubber cement. Much better than the
hard slippery wood surface on the paper guillotine.

BTW, there are some paper cutters with anti skid surfaces.

 > I can see it working with larger boards.
 > So maybe for boards less than 2" use the sheers and
 > greater than 2" use the cutter.

I agree. My tin snips are the old style that look like large
scissors, not the modern type with force multiplication.
The blades are a bit more than 4" long.

Longer boards than the blade length tend to warp the board
when it has to curl up over the handle.

The modern snips tend to warp even short boards though.

 > Rick

Duane

-- 
     Home of the $35 Solar Tracker      Receiver
    http://www.redrok.com/led3xassm.htm      [*]
   Powered by             \  \     \        //|
  Thermonuclear   Solar Energy from the Sun / |
Energy (the SUN)           \  \     \  /  /  |
Red Rock Energy             \  \     /   /   |
Duane C. Johnson   Designer  \  \  /  \ /    |
1825 Florence St  Heliostat,Control,& Mounts |
White Bear Lake, Minnesota    === \   / \    |
USA      55110-3364                ===   \   |
(651)426-4766        use Courier New Font \  |
redrok@...     (my email: address)  \ |
http://www.redrok.com  (Web site)          ===

Re: [Homebrew_PCBs] PCB cutting

2012-12-20 by joe M

check this out: http://www.prc68.com/I/12InShear.shtml

cuts pcb like butter.

On Thu, Dec 20, 2012 at 9:55 AM, Duane C. Johnson <redrok@...> wrote:

> **
>
>
> Hi Rick;
>
>
> Rick Sparber <rgsparber@...> wrote:
>
> > I have one of these paper cutters but it did not work well
> > for me. The small board squirmed as I started to cut.
>
> I added "Rubberized Shelf Liner" to the bed. I glued
> this stuff down with rubber cement. Much better than the
> hard slippery wood surface on the paper guillotine.
>
> BTW, there are some paper cutters with anti skid surfaces.
>
>
> > I can see it working with larger boards.
> > So maybe for boards less than 2" use the sheers and
> > greater than 2" use the cutter.
>
> I agree. My tin snips are the old style that look like large
> scissors, not the modern type with force multiplication.
> The blades are a bit more than 4" long.
>
> Longer boards than the blade length tend to warp the board
> when it has to curl up over the handle.
>
> The modern snips tend to warp even short boards though.
>
> > Rick
>
>
> Duane
>
> --
> Home of the $35 Solar Tracker Receiver
> http://www.redrok.com/led3xassm.htm [*]
> Powered by \ \ \ //|
> Thermonuclear Solar Energy from the Sun / |
> Energy (the SUN) \ \ \ / / |
> Red Rock Energy \ \ / / |
> Duane C. Johnson Designer \ \ / \ / |
> 1825 Florence St Heliostat,Control,& Mounts |
> White Bear Lake, Minnesota === \ / \ |
> USA 55110-3364 === \ |
> (651)426-4766 use Courier New Font \ |
> redrok@... (my email: address) \ |
> http://www.redrok.com (Web site) ===
>
>  
>


[Non-text portions of this message have been removed]

RE: [Homebrew_PCBs] PCB cutting

2012-12-20 by Rick Sparber

I see it at Enco for $129:

http://www.use-enco.com/CGI/INPDFF?PMPAGE=577&PMCTLG=00

Nice tool. I'll have to see if I can make one.

Thanks,

Rick
Show quoted textHide quoted text
-----Original Message-----
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of joe M
Sent: Thursday, December 20, 2012 9:19 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] PCB cutting

check this out: http://www.prc68.com/I/12InShear.shtml

cuts pcb like butter.

On Thu, Dec 20, 2012 at 9:55 AM, Duane C. Johnson <redrok@...> wrote:

> **
>
>
> Hi Rick;
>
>
> Rick Sparber <rgsparber@...> wrote:
>
> > I have one of these paper cutters but it did not work well for me. 
> > The small board squirmed as I started to cut.
>
> I added "Rubberized Shelf Liner" to the bed. I glued this stuff down 
> with rubber cement. Much better than the hard slippery wood surface on 
> the paper guillotine.
>
> BTW, there are some paper cutters with anti skid surfaces.
>
>
> > I can see it working with larger boards.
> > So maybe for boards less than 2" use the sheers and greater than 2" 
> > use the cutter.
>
> I agree. My tin snips are the old style that look like large scissors, 
> not the modern type with force multiplication.
> The blades are a bit more than 4" long.
>
> Longer boards than the blade length tend to warp the board when it has 
> to curl up over the handle.
>
> The modern snips tend to warp even short boards though.
>
> > Rick
>
>
> Duane
>
> --
> Home of the $35 Solar Tracker Receiver 
> http://www.redrok.com/led3xassm.htm [*] Powered by \ \ \ //| 
> Thermonuclear Solar Energy from the Sun / | Energy (the SUN) \ \ \ / / 
> | Red Rock Energy \ \ / / | Duane C. Johnson Designer \ \ / \ / |
> 1825 Florence St Heliostat,Control,& Mounts | White Bear Lake, 
> Minnesota === \ / \ | USA 55110-3364 === \ |
> (651)426-4766 use Courier New Font \ | redrok@... (my email: 
> address) \ | http://www.redrok.com (Web site) ===
>
>  
>


[Non-text portions of this message have been removed]



------------------------------------

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Re: [Homebrew_PCBs] PCB cutting

2012-12-20 by Duane C. Johnson

Hi Rick;

Rick Sparber <rgsparber@...> wrote:

 > I see it at Enco for $129:

Check the part@ directly:
http://www.use-enco.com/CGI/INLMKD?SIITEM001=130-5700&SIQTY001=1&SICOUNT=1
On sale for $89us.

 > http://www.use-enco.com/CGI/INPDFF?PMPAGE=577&PMCTLG=00

 > Nice tool. I'll have to see if I can make one.

 > Thanks,
 > Rick

Duane

-- 
     Home of the $35 Solar Tracker      Receiver
    http://www.redrok.com/led3xassm.htm      [*]
   Powered by             \  \     \        //|
  Thermonuclear   Solar Energy from the Sun / |
Energy (the SUN)           \  \     \  /  /  |
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1825 Florence St  Heliostat,Control,& Mounts |
White Bear Lake, Minnesota    === \   / \    |
USA      55110-3364                ===   \   |
(651)426-4766        use Courier New Font \  |
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http://www.redrok.com  (Web site)          ===

Re: [Homebrew_PCBs] PCB cutting

2012-12-20 by joe M

and, no dust flying around.

Watch out with those rotary cutters. FR4 dust does not seem to be good for
the lungs. A pulmonologist said that they see a lot of silicosis patients
(ex-sandblasting workers, etc). Not sure how that translates to FR4 though.

On Thu, Dec 20, 2012 at 11:33 AM, Duane C. Johnson <redrok@...>wrote:

> **
>
>
> Hi Rick;
>
> Rick Sparber <rgsparber@...> wrote:
>
> > I see it at Enco for $129:
>
> Check the part@ directly:
> http://www.use-enco.com/CGI/INLMKD?SIITEM001=130-5700&SIQTY001=1&SICOUNT=1
> On sale for $89us.
>
>
> > http://www.use-enco.com/CGI/INPDFF?PMPAGE=577&PMCTLG=00
>
> > Nice tool. I'll have to see if I can make one.
>
> > Thanks,
> > Rick
>
> Duane
>
> --
> Home of the $35 Solar Tracker Receiver
> http://www.redrok.com/led3xassm.htm [*]
> Powered by \ \ \ //|
> Thermonuclear Solar Energy from the Sun / |
> Energy (the SUN) \ \ \ / / |
> Red Rock Energy \ \ / / |
> Duane C. Johnson Designer \ \ / \ / |
> 1825 Florence St Heliostat,Control,& Mounts |
> White Bear Lake, Minnesota === \ / \ |
> USA 55110-3364 === \ |
> (651)426-4766 use Courier New Font \ |
> redrok@... (my email: address) \ |
> http://www.redrok.com (Web site) ===
>
>  
>


[Non-text portions of this message have been removed]

Re: PCB cutting

2012-12-21 by Mars Bonfire

I have the equivalent bench shear from Gizzly Tool...but in the 8" size (Grizzly didn't seem to carry the 12" anymore).  Looks almost identical to the enco with a somewhat different design for the hold down.  

If it is the same quality as the Grizzly, it is a great tool.  I use it to shear everything from 1/8 plate down through 0.01" brass
shim stock.  The blades are hard and easily removable for resharpening which should be a snap.  It should cut PCB like butter though I hate to dull the blade cutting glass fiber.  For cutting PCBs are other plastics I use a Freud Diablo non-ferrous cutting 10" blade on a table saw (carbide, 80 tooth as I recall) it has a very interesting tooth profile and a low, if not negative "hook".  Cuts plastic and aluminum plate like butter...virtually no burrs.

Steve


--- In Homebrew_PCBs@yahoogroups.com, "Duane C. Johnson" <redrok@...> wrote:
Show quoted textHide quoted text
>
> Hi Rick;
> 
> Rick Sparber <rgsparber@...> wrote:
> 
>  > I see it at Enco for $129:
> 
> Check the part@ directly:
> http://www.use-enco.com/CGI/INLMKD?SIITEM001=130-5700&SIQTY001=1&SICOUNT=1
> On sale for $89us.
> 
>  > http://www.use-enco.com/CGI/INPDFF?PMPAGE=577&PMCTLG=00
> 
>  > Nice tool. I'll have to see if I can make one.
> 
>  > Thanks,
>  > Rick
> 
> Duane
> 
> -- 
>      Home of the $35 Solar Tracker      Receiver
>     http://www.redrok.com/led3xassm.htm      [*]
>    Powered by             \  \     \        //|
>   Thermonuclear   Solar Energy from the Sun / |
> Energy (the SUN)           \  \     \  /  /  |
> Red Rock Energy             \  \     /   /   |
> Duane C. Johnson   Designer  \  \  /  \ /    |
> 1825 Florence St  Heliostat,Control,& Mounts |
> White Bear Lake, Minnesota    === \   / \    |
> USA      55110-3364                ===   \   |
> (651)426-4766        use Courier New Font \  |
> redrok@...     (my email: address)  \ |
> http://www.redrok.com  (Web site)          ===
>

Re: PCB cutting

2012-12-21 by nordhs

The best things I have found for PCB cutting involve a shearing cut, rather than stock removal, like a blade.  I was using my bandsaw and got great cuts without stressing the board but it dulled the blade very fast.  You could try a scroll saw for very small boards since the blades are cheap.  

The aviation snips can curl the board.  PCB cutters are a shearing blade with lots of board support around it.  I should try my throatless metal shear...

If you set up a vacuum and wear an air filter, abrasives do a great job trimming and rounding corners.  Don't breathe the dust though.  It is very controlled board removal and 1x42 belts are cheap.
Steve

Re: [Homebrew_PCBs] Re: PCB cutting

2012-12-22 by Corey Minion

Why would fiberglass dull blades any faster than yellow or red brass or 
any other metal for that matter?

If you want to cut boards on a tablesaw, I would recommend a plastics 
and phenolics ready triple chip grind neg rake blade such as this one
< 
http://www.toolstoday.com/p-5968-industrial-quality-plastic-cutting-saw-blades.aspx?variantids=10261,0& 
Show quoted textHide quoted text
 >


On 12/21/2012 12:24 PM, Mars Bonfire wrote:
> I have the equivalent bench shear from Gizzly Tool...but in the 8" size (Grizzly didn't seem to carry the 12" anymore).  Looks almost identical to the enco with a somewhat different design for the hold down.
>
> If it is the same quality as the Grizzly, it is a great tool.  I use it to shear everything from 1/8 plate down through 0.01" brass
> shim stock.  The blades are hard and easily removable for resharpening which should be a snap.  It should cut PCB like butter though I hate to dull the blade cutting glass fiber.  For cutting PCBs are other plastics I use a Freud Diablo non-ferrous cutting 10" blade on a table saw (carbide, 80 tooth as I recall) it has a very interesting tooth profile and a low, if not negative "hook".  Cuts plastic and aluminum plate like butter...virtually no burrs.
>
> Steve
>
>

Re: PCB cutting

2012-12-22 by AlienRelics

Ask anyone who has tried to drill out a PCB using standard high speed steel drill bits, or tried to mill a PCB with a high speed steel engraving bit.

If cutting on a tablesaw, I'd strongly recommend a carbide tipped blade. For drilling and milling, again carbide.

Steve Greenfield AE7HD

--- In Homebrew_PCBs@yahoogroups.com, Corey Minion <csminion@...> wrote:
Show quoted textHide quoted text
>
> Why would fiberglass dull blades any faster than yellow or red brass or 
> any other metal for that matter?
> 
> If you want to cut boards on a tablesaw, I would recommend a plastics 
> and phenolics ready triple chip grind neg rake blade such as this one
> < 
> http://www.toolstoday.com/p-5968-industrial-quality-plastic-cutting-saw-blades.aspx?variantids=10261,0& 
>  >
> 
> 
> On 12/21/2012 12:24 PM, Mars Bonfire wrote:
> > I have the equivalent bench shear from Gizzly Tool...but in the 8" size (Grizzly didn't seem to carry the 12" anymore).  Looks almost identical to the enco with a somewhat different design for the hold down.
> >
> > If it is the same quality as the Grizzly, it is a great tool.  I use it to shear everything from 1/8 plate down through 0.01" brass
> > shim stock.  The blades are hard and easily removable for resharpening which should be a snap.  It should cut PCB like butter though I hate to dull the blade cutting glass fiber.  For cutting PCBs are other plastics I use a Freud Diablo non-ferrous cutting 10" blade on a table saw (carbide, 80 tooth as I recall) it has a very interesting tooth profile and a low, if not negative "hook".  Cuts plastic and aluminum plate like butter...virtually no burrs.
> >
> > Steve
> >
> >
>

Re: [Homebrew_PCBs] Re: PCB cutting

2012-12-22 by jeremy youngs

because the glass reinforcement in the board is very hard

On Sat, Dec 22, 2012 at 12:22 AM, Corey Minion <csminion@...>wrote:

> **
>
>
> Why would fiberglass dull blades any faster than yellow or red brass or
> any other metal for that matter?
>
>
-- 
jeremy youngs


[Non-text portions of this message have been removed]

Re: [Homebrew_PCBs] Re: PCB cutting

2012-12-22 by Corey Minion

Odd, I have drilled out hundreds if not thousands of undersized holes in 
boards (down to my last 25 boards after 3 years)
It was my first pcb design and I screwed that up, never occurred to me 
that there were different sized leads on that first one.
Anyone lubing there bits and tools prior to cutting?
Also, are you use some sort of cooling?
I use compressed air when working on boards.

I have used 2 HSS bits over all that time, never noticed them dull much 
more than any tool I may work with on polycarb or acrylic.
I find it dulls far less than working on ferrous metals, and less than 
non-ferrous as well.

I am a college and real world trained silver(metal)smith since 89.
I have always been really conscious of tool sharpness

Worst material I have found so far to work with, industrial ceramics.
EATS tools. nam nam nam.
Show quoted textHide quoted text
On 12/22/2012 11:54 AM, AlienRelics wrote:
> Ask anyone who has tried to drill out a PCB using standard high speed steel drill bits, or tried to mill a PCB with a high speed steel engraving bit.
>
> If cutting on a tablesaw, I'd strongly recommend a carbide tipped blade. For drilling and milling, again carbide.
>
> Steve Greenfield AE7HD
>
> --- In Homebrew_PCBs@yahoogroups.com, Corey Minion <csminion@...> wrote:
>> Why would fiberglass dull blades any faster than yellow or red brass or
>> any other metal for that matter?
>>
>> If you want to cut boards on a tablesaw, I would recommend a plastics
>> and phenolics ready triple chip grind neg rake blade such as this one
>> <
>> http://www.toolstoday.com/p-5968-industrial-quality-plastic-cutting-saw-blades.aspx?variantids=10261,0&
>>   >
>>
>>
>> On 12/21/2012 12:24 PM, Mars Bonfire wrote:
>>> I have the equivalent bench shear from Gizzly Tool...but in the 8" size (Grizzly didn't seem to carry the 12" anymore).  Looks almost identical to the enco with a somewhat different design for the hold down.
>>>
>>> If it is the same quality as the Grizzly, it is a great tool.  I use it to shear everything from 1/8 plate down through 0.01" brass
>>> shim stock.  The blades are hard and easily removable for resharpening which should be a snap.  It should cut PCB like butter though I hate to dull the blade cutting glass fiber.  For cutting PCBs are other plastics I use a Freud Diablo non-ferrous cutting 10" blade on a table saw (carbide, 80 tooth as I recall) it has a very interesting tooth profile and a low, if not negative "hook".  Cuts plastic and aluminum plate like butter...virtually no burrs.
>>>
>>> Steve
>>>
>>>
>
>
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>
>

Re: PCB cutting

2012-12-22 by smilingcat90254

Really should not be using HSS blades. Here is a link to information regarding FR4 PCB. 

http://drum.lib.umd.edu/bitstream/1903/8362/1/umi-umd-5671.pdf

chapt 2. has information on the composition of the FR4 core. And it says "The woven glass (generally E-grade) fiber cloth acts as reinforcement for the laminate, primarily providing mechanical strength and electrical properties."

E-glass. It is basically the same kind of glass as in your windows, glass bottles... HSS blade will dull very quickly and be ruined. Have you tried to cut glass with HSS blade? I use a diamond scribe to score a glass. We also have a diamond coated abrasives to trim stained glass. We always use water. I have near phobia level fear of glass powder. Silicosis is not good at any age.

And those working with fiberglass fabric S-glass, E-glass, kevlar and carbon, they buy  scissors by the box load and throw them away as the blade gets dull. Pair of fabric scissors are lot cheaper than a tin snips. And tin snips last just as long as regular fabric scissors and not much more. If you want exercise in frustration, cut a glass fabric at an oblique angle to the direction of the weave. Hint, use adhesive tape near the cut.

And yes for this reason, preference is for carbide tipped blades and drill bits.

--- In Homebrew_PCBs@yahoogroups.com, jeremy youngs <jcyoungs76@...> wrote:
Show quoted textHide quoted text
>
> because the glass reinforcement in the board is very hard
> 
> On Sat, Dec 22, 2012 at 12:22 AM, Corey Minion <csminion@...>wrote:
> 
> > **
> >
> >
> > Why would fiberglass dull blades any faster than yellow or red brass or
> > any other metal for that matter?
> >
> >
> -- 
> jeremy youngs
> 
> 
> [Non-text portions of this message have been removed]
>

Re: PCB cutting

2012-12-24 by AlienRelics

Widening a hole is asking a lot less than drilling a hole where none exists.

Steve Greenfield AE7HD

--- In Homebrew_PCBs@yahoogroups.com, Corey Minion <csminion@...> wrote:
Show quoted textHide quoted text
>
> Odd, I have drilled out hundreds if not thousands of undersized holes in 
> boards (down to my last 25 boards after 3 years)
> It was my first pcb design and I screwed that up, never occurred to me 
> that there were different sized leads on that first one.
> Anyone lubing there bits and tools prior to cutting?
> Also, are you use some sort of cooling?
> I use compressed air when working on boards.
> 
> I have used 2 HSS bits over all that time, never noticed them dull much 
> more than any tool I may work with on polycarb or acrylic.
> I find it dulls far less than working on ferrous metals, and less than 
> non-ferrous as well.
> 
> I am a college and real world trained silver(metal)smith since 89.
> I have always been really conscious of tool sharpness
> 
> Worst material I have found so far to work with, industrial ceramics.
> EATS tools. nam nam nam.
>

Re: [Homebrew_PCBs] Re: PCB cutting

2012-12-24 by jeremy youngs

also to note when producing boards one is usually using a high speed
spindle and turning 15000 or more rpm

On Sun, Dec 23, 2012 at 7:43 PM, AlienRelics <alienrelics@...> wrote:

> **
>
>
> Widening a hole is asking a lot less than drilling a hole where none
> exists.
>
> Steve Greenfield AE7HD
>
> --- In Homebrew_PCBs@yahoogroups.com, Corey Minion <csminion@...> wrote:
> >
> > Odd, I have drilled out hundreds if not thousands of undersized holes in
> > boards (down to my last 25 boards after 3 years)
> > It was my first pcb design and I screwed that up, never occurred to me
> > that there were different sized leads on that first one.
> > Anyone lubing there bits and tools prior to cutting?
> > Also, are you use some sort of cooling?
> > I use compressed air when working on boards.
> >
> > I have used 2 HSS bits over all that time, never noticed them dull much
> > more than any tool I may work with on polycarb or acrylic.
> > I find it dulls far less than working on ferrous metals, and less than
> > non-ferrous as well.
> >
> > I am a college and real world trained silver(metal)smith since 89.
> > I have always been really conscious of tool sharpness
> >
> > Worst material I have found so far to work with, industrial ceramics.
> > EATS tools. nam nam nam.
> >
>
>  
>



-- 
jeremy youngs


[Non-text portions of this message have been removed]

Re: [Homebrew_PCBs] Re: PCB cutting

2012-12-24 by Corey Minion

Yeah, I thought about that.
I can see that having a lot to do with the longevity.
Show quoted textHide quoted text
On 12/23/2012 7:43 PM, AlienRelics wrote:
> Widening a hole is asking a lot less than drilling a hole where none exists.
>
> Steve Greenfield AE7HD
>
> --- In Homebrew_PCBs@yahoogroups.com, Corey Minion <csminion@...> wrote:
>> Odd, I have drilled out hundreds if not thousands of undersized holes in
>> boards (down to my last 25 boards after 3 years)
>> It was my first pcb design and I screwed that up, never occurred to me
>> that there were different sized leads on that first one.
>> Anyone lubing there bits and tools prior to cutting?
>> Also, are you use some sort of cooling?
>> I use compressed air when working on boards.
>>
>> I have used 2 HSS bits over all that time, never noticed them dull much
>> more than any tool I may work with on polycarb or acrylic.
>> I find it dulls far less than working on ferrous metals, and less than
>> non-ferrous as well.
>>
>> I am a college and real world trained silver(metal)smith since 89.
>> I have always been really conscious of tool sharpness
>>
>> Worst material I have found so far to work with, industrial ceramics.
>> EATS tools. nam nam nam.
>>
>
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>
>

Re: [Homebrew_PCBs] Re: PCB cutting

2012-12-24 by Corey Minion

Now that makes me wonder, as there are recommend speed rates for cutting 
materials.

I can drill acrylic plastics with a 1/4" drill and at very different rpm 
than nickel, which is at a very different rpm than brass, again, a 
different speed than mild steel.
Change the bit size more than 10% in either direction and usually the 
speeds for all will need to change again.
It can be rather a PITA when doing a number of different sized holes in 
one material.

What are the correct rpms for through drilling "virgin" boards and 
different dia holes?
Show quoted textHide quoted text
On 12/24/2012 2:43 AM, jeremy youngs wrote:
> also to note when producing boards one is usually using a high speed
> spindle and turning 15000 or more rpm
>
> On Sun, Dec 23, 2012 at 7:43 PM, AlienRelics <alienrelics@...> wrote:
>
>> **
>>
>>
>> Widening a hole is asking a lot less than drilling a hole where none
>> exists.
>>
>> Steve Greenfield AE7HD
>>
>> --- In Homebrew_PCBs@yahoogroups.com, Corey Minion <csminion@...> wrote:
>>> Odd, I have drilled out hundreds if not thousands of undersized holes in
>>> boards (down to my last 25 boards after 3 years)
>>> It was my first pcb design and I screwed that up, never occurred to me
>>> that there were different sized leads on that first one.
>>> Anyone lubing there bits and tools prior to cutting?
>>> Also, are you use some sort of cooling?
>>> I use compressed air when working on boards.
>>>
>>> I have used 2 HSS bits over all that time, never noticed them dull much
>>> more than any tool I may work with on polycarb or acrylic.
>>> I find it dulls far less than working on ferrous metals, and less than
>>> non-ferrous as well.
>>>
>>> I am a college and real world trained silver(metal)smith since 89.
>>> I have always been really conscious of tool sharpness
>>>
>>> Worst material I have found so far to work with, industrial ceramics.
>>> EATS tools. nam nam nam.
>>>
>>   
>>
>
>

Re: [Homebrew_PCBs] Re: PCB cutting

2012-12-25 by Harvey White

On Mon, 24 Dec 2012 12:07:19 -0500, you wrote:

>Now that makes me wonder, as there are recommend speed rates for cutting 
>materials.
>
>I can drill acrylic plastics with a 1/4" drill and at very different rpm 
>than nickel, which is at a very different rpm than brass, again, a 
>different speed than mild steel.
>Change the bit size more than 10% in either direction and usually the 
>speeds for all will need to change again.
>It can be rather a PITA when doing a number of different sized holes in 
>one material.
>
>What are the correct rpms for through drilling "virgin" boards and 
>different dia holes?

Generally, from about #50 on down, I use at least 20000 RPM, and would
use 30 from #60 on down, if I had something that did it.

For #50 to about #40 I'd use 10K RPM or so, but that's a feel thing
rather than not.

The real thing to calculate is chip load (how much is drilled per
revolution) and SFM (surface feet/minute) which is computed at the
edge of the drill bit and is related directly to drill size (in terms
of RPM).

No idea of what it's supposed to be for FR4, and also needs to be
adjusted for tools used.

Harvey
Show quoted textHide quoted text
>
>
>
>On 12/24/2012 2:43 AM, jeremy youngs wrote:
>> also to note when producing boards one is usually using a high speed
>> spindle and turning 15000 or more rpm
>>
>> On Sun, Dec 23, 2012 at 7:43 PM, AlienRelics <alienrelics@...> wrote:
>>
>>> **
>>>
>>>
>>> Widening a hole is asking a lot less than drilling a hole where none
>>> exists.
>>>
>>> Steve Greenfield AE7HD
>>>
>>> --- In Homebrew_PCBs@yahoogroups.com, Corey Minion <csminion@...> wrote:
>>>> Odd, I have drilled out hundreds if not thousands of undersized holes in
>>>> boards (down to my last 25 boards after 3 years)
>>>> It was my first pcb design and I screwed that up, never occurred to me
>>>> that there were different sized leads on that first one.
>>>> Anyone lubing there bits and tools prior to cutting?
>>>> Also, are you use some sort of cooling?
>>>> I use compressed air when working on boards.
>>>>
>>>> I have used 2 HSS bits over all that time, never noticed them dull much
>>>> more than any tool I may work with on polycarb or acrylic.
>>>> I find it dulls far less than working on ferrous metals, and less than
>>>> non-ferrous as well.
>>>>
>>>> I am a college and real world trained silver(metal)smith since 89.
>>>> I have always been really conscious of tool sharpness
>>>>
>>>> Worst material I have found so far to work with, industrial ceramics.
>>>> EATS tools. nam nam nam.
>>>>
>>>   
>>>
>>
>>

Re: [Homebrew_PCBs] Re: PCB cutting

2012-12-25 by Mitch Davis

On 12/25/12, Harvey White <madyn@...> wrote:
>
>>Now that makes me wonder, as there are recommend speed rates for cutting
>>materials.
>>
>>What are the correct rpms for through drilling "virgin" boards and
>>different dia holes?
>
> Generally, from about #50 on down, I use at least 20000 RPM, and would
> use 30 from #60 on down, if I had something that did it.

Not uncommon for the drilling machines in the fabs to run at
200,000RPM.  They are insane to watch.  The drill heads pop up and
down as fast as the needle on a sewing machine.  I took some video at
the recent Shenzhen China PCB show, but because Youtube is blocked in
China, it's difficult for me to show you.

Mitch.

RE: [Homebrew_PCBs] Re: PCB cutting

2012-12-25 by Jeff Heiss

200,000 RPM wow!  Are the air turbines like a dentist drill?  

 

Jeff

 

  _____  
Show quoted textHide quoted text
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of Mitch Davis
Sent: Tuesday, December 25, 2012 12:27 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Re: PCB cutting

 

  

On 12/25/12, Harvey White <madyn@...
<mailto:madyn%40dragonworks.info> > wrote:
>
>>Now that makes me wonder, as there are recommend speed rates for cutting
>>materials.
>>
>>What are the correct rpms for through drilling "virgin" boards and
>>different dia holes?
>
> Generally, from about #50 on down, I use at least 20000 RPM, and would
> use 30 from #60 on down, if I had something that did it.

Not uncommon for the drilling machines in the fabs to run at
200,000RPM. They are insane to watch. The drill heads pop up and
down as fast as the needle on a sewing machine. I took some video at
the recent Shenzhen China PCB show, but because Youtube is blocked in
China, it's difficult for me to show you.

Mitch.





[Non-text portions of this message have been removed]

Re: PCB cutting

2012-12-29 by tda7000

If youtube has issues with it why not just upload the video files to something like rapidshare and we can all download a copy instead?

--- In Homebrew_PCBs@yahoogroups.com, Mitch Davis <mjd@...> wrote:
Show quoted textHide quoted text
>
> On 12/25/12, Harvey White <madyn@...> wrote:
> >
> >>Now that makes me wonder, as there are recommend speed rates for cutting
> >>materials.
> >>
> >>What are the correct rpms for through drilling "virgin" boards and
> >>different dia holes?
> >
> > Generally, from about #50 on down, I use at least 20000 RPM, and would
> > use 30 from #60 on down, if I had something that did it.
> 
> Not uncommon for the drilling machines in the fabs to run at
> 200,000RPM.  They are insane to watch.  The drill heads pop up and
> down as fast as the needle on a sewing machine.  I took some video at
> the recent Shenzhen China PCB show, but because Youtube is blocked in
> China, it's difficult for me to show you.
> 
> Mitch.
>

Re: [Homebrew_PCBs] Re: PCB cutting

2012-12-29 by Mitch Davis

On Sat, Dec 29, 2012 at 12:53 PM, tda7000 <Tda7000@...> wrote:
> If youtube has issues with it why not just upload the video files to
> something like rapidshare and we can all download a copy instead?

Coz that's blocked too.

Re: PCB cutting

2012-12-29 by tda7000

I think I misunderstood - I thought Youtube was blocking your video, but if I am correct now you are in China and can't access Youtube?

Someone here must know a site that would work...

--- In Homebrew_PCBs@yahoogroups.com, Mitch Davis <mjd@...> wrote:
Show quoted textHide quoted text
>
> On Sat, Dec 29, 2012 at 12:53 PM, tda7000 <Tda7000@...> wrote:
> > If youtube has issues with it why not just upload the video files to
> > something like rapidshare and we can all download a copy instead?
> 
> Coz that's blocked too.
>

Re: [Homebrew_PCBs] Re: PCB cutting

2012-12-29 by kabowers@NorthState.net

On Sat, 29 Dec 2012 06:22:43 -0000, you wrote:

>I think I misunderstood - I thought Youtube was blocking your video, but if I am correct now you are in China and can't access Youtube?
>
>Someone here must know a site that would work...
>
>--- In Homebrew_PCBs@yahoogroups.com, Mitch Davis <mjd@...> wrote:
>>
>> On Sat, Dec 29, 2012 at 12:53 PM, tda7000 <Tda7000@...> wrote:
>> > If youtube has issues with it why not just upload the video files to
>> > something like rapidshare and we can all download a copy instead?
>> 
>> Coz that's blocked too.
>>
>
It would be a bit of work, but you could post it on one of the binary
newsgroups and someone here could pull it down and post it on youtube
etc.
Keith Bowers WB4LSJ- Thomasville, NC

Re: [Homebrew_PCBs] Re: PCB cutting

2012-12-29 by Harvey White

On Sat, 29 Dec 2012 06:22:43 -0000, you wrote:

>I think I misunderstood - I thought Youtube was blocking your video, but if I am correct now you are in China and can't access Youtube?
>
>Someone here must know a site that would work...

IIRC, the Chinese Government has blocked "subversive" sites such as
Youtube....

Harvey
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>
>--- In Homebrew_PCBs@yahoogroups.com, Mitch Davis <mjd@...> wrote:
>>
>> On Sat, Dec 29, 2012 at 12:53 PM, tda7000 <Tda7000@...> wrote:
>> > If youtube has issues with it why not just upload the video files to
>> > something like rapidshare and we can all download a copy instead?
>> 
>> Coz that's blocked too.
>>
>

Re: [Homebrew_PCBs] Re: PCB cutting

2012-12-29 by Mitch Davis

On Sun, Dec 30, 2012 at 12:29 AM, Harvey White <madyn@...> wrote:
> On Sat, 29 Dec 2012 06:22:43 -0000, you wrote:
>
>>I think I misunderstood - I thought Youtube was blocking your video, but if I am correct now you are in China and can't access Youtube?
>>
>>Someone here must know a site that would work...
>
> IIRC, the Chinese Government has blocked "subversive" sites such as
> Youtube....

Because of course, cute kittens are somehow dangerous.

Anyway, after all that I looked at my phone today, and it seems that I
unintentionally took a rather unconvincing still picture, rather than
video.  Sorry guys.

Mitch.