Homebrew_PCBs

Hi,

Just finished putting together a CNC drilling machine and have now
stumbled on a problem that I never anticipated....The drilling machine
appears to be more accurate than the printer used for the PCB
artwork....Tried both a HP2420 (laser) and Epson 2200 (Inkjet) and the
results were similar. Is this a known issue with CNC setups?

On Mon, 13 Jun 2005 17:39:15 +0200, derekhawkins <derekhawkins@...>
wrote:

> Hi,
> Just finished putting together a CNC drilling machine and have now
> stumbled on a problem that I never anticipated....The drilling machine
> appears to be more accurate than the printer used for the PCB
> artwork....Tried both a HP2420 (laser) and Epson 2200 (Inkjet) and the
> results were similar. Is this a known issue with CNC setups?

yes, this is a known issue. lasers have all kinds of distortions.
You can fight it by using non-shrinking media (in case of the laser), and
separate correction factors for x and y axis.
If your PCB software does not support correction factors make a picture
and resize it with irfanview (www.irfanview.com).

I got my printer to produce a toner transfer that had non-measurable
distortion only, so that should be possible.


ST

From: "derekhawkins" <derekhawkins@...>
Date sent: Mon, 13 Jun 2005 15:39:15 -0000
Subject: [Homebrew_PCBs] Artwork for CNC drilling PCBs
Send reply to: Homebrew_PCBs@yahoogroups.com

> Hi,
>
> Just finished putting together a CNC drilling machine and have now
> stumbled on a problem that I never anticipated....The drilling machine
> appears to be more accurate than the printer used for the PCB
> artwork....Tried both a HP2420 (laser) and Epson 2200 (Inkjet) and the
> results were similar. Is this a known issue with CNC setups?
>

Hi Derek

I can't speak for CNC, but my Samsung ML-1210 printer does
change the size slightly. I put my artwork into "word" and keep
adjusting the horizontal and/or vertical until it prints properly.

Regards Alan

HI Derek,

what design for the driller did you use? Any photos?

I am told that some laser printers will shrink the
design slightly in one direction. Haven't had that
problem yet, still designing my machine.

Myc

--- derekhawkins <derekhawkins@...> wrote:

> Hi,
>
> Just finished putting together a CNC drilling
> machine and have now
> stumbled on a problem that I never
> anticipated....The drilling machine
> appears to be more accurate than the printer used
> for the PCB
> artwork....Tried both a HP2420 (laser) and Epson
> 2200 (Inkjet) and the
> results were similar. Is this a known issue with CNC
> setups?
>
>
>
>
>
>

__________________________________
Discover Yahoo!
Get on-the-go sports scores, stock quotes, news and more. Check it out!
http://discover.yahoo.com/mobile.html

--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
<stefan_trethan@g...> wrote:

> On Mon, 13 Jun 2005 17:39:15 +0200, derekhawkins

<derekhawkins@y...>

> wrote:
>
> > Hi,
> > Just finished putting together a CNC drilling machine and have now
> > stumbled on a problem that I never anticipated....The drilling

machine

> > appears to be more accurate than the printer used for the PCB
> > artwork....Tried both a HP2420 (laser) and Epson 2200 (Inkjet)

and the

> > results were similar. Is this a known issue with CNC setups?
>
>
> yes, this is a known issue. lasers have all kinds of distortions.
> You can fight it by using non-shrinking media (in case of the

laser), and

> separate correction factors for x and y axis.
> If your PCB software does not support correction factors make a

picture

> and resize it with irfanview (www.irfanview.com).
>
> I got my printer to produce a toner transfer that had non-

measurable

> distortion only, so that should be possible.
>
>
> ST

I'm only using artwork printed on paper at this point. If it cannot
drill that properly then it's pointless trying with an actual board.
Already using scaling factors of 1.002 for the X axis and .999 for
the Y axis. For a 6" X 4" matrix of 1/4" spaced holes printed at top-
center using the laser it does better than I could ever hope to drill
manually but for a 9" X 7" matrix there seems to be skewing (greater
than 10 thou) at one of the outer edges. Scaling can't help in that
case. So you think it's fuser heat causing it? But the injet isn't
much better either even though its errors are elsewhere.

BTW, a word of advice....Forget the toner transfer method.

I bought a milling table from Enco (US) and modified it for minimal
backlash and CNC on X and Y axis. Modified the drill press for CNC on
the Z axis. Using DC geardhead motors retrofitted with encoders, a
servo setup....TurboCNC is the software. Yes, there are photos.

--- In Homebrew_PCBs@yahoogroups.com, Mycroft2152 <mycroft2152@y...>
wrote:

> HI Derek,
>
> what design for the driller did you use? Any photos?
>
> I am told that some laser printers will shrink the
> design slightly in one direction. Haven't had that
> problem yet, still designing my machine.
>
> Myc
>
> --- derekhawkins <derekhawkins@y...> wrote:
>
> > Hi,
> >
> > Just finished putting together a CNC drilling
> > machine and have now
> > stumbled on a problem that I never
> > anticipated....The drilling machine
> > appears to be more accurate than the printer used
> > for the PCB
> > artwork....Tried both a HP2420 (laser) and Epson
> > 2200 (Inkjet) and the
> > results were similar. Is this a known issue with CNC
> > setups?
> >
> >
> >
> >
> >
> >
>
>
>
>
> __________________________________
> Discover Yahoo!
> Get on-the-go sports scores, stock quotes, news and more. Check it

out!

> http://discover.yahoo.com/mobile.html

On Mon, 13 Jun 2005 19:07:21 +0200, derekhawkins <derekhawkins@...>
wrote:

>
> I'm only using artwork printed on paper at this point. If it cannot
> drill that properly then it's pointless trying with an actual board.
> Already using scaling factors of 1.002 for the X axis and .999 for
> the Y axis. For a 6" X 4" matrix of 1/4" spaced holes printed at top-
> center using the laser it does better than I could ever hope to drill
> manually but for a 9" X 7" matrix there seems to be skewing (greater
> than 10 thou) at one of the outer edges. Scaling can't help in that
> case. So you think it's fuser heat causing it? But the injet isn't
> much better either even though its errors are elsewhere.
> BTW, a word of advice....Forget the toner transfer method.

lasers have distortion from rotational conversion i am told.
inkjets should not have that.


I will not have heard your comment about TT, as i inted to use it with a
CNC.
with silicone paper there is no more distortion as there was with the
madly shrinking inkjet paper.
I have done 15cmx15cm tests with no measurable distortion after transfer.
(i do not need greater boards).
Have you tried it? how bad was it?


ST

On Mon, 13 Jun 2005 19:29:06 +0200, Stefan Trethan <stefan_trethan@...>
wrote:

>
> lasers have distortion from rotational conversion i am told.
> inkjets should not have that.

Hey what i forgot to say:

download the service manual for your printer and do the feed/printing
alignment procedures. I had a trapezoid distortion and skew that went away
after doing that.

ST

Derek,

Hve you posted them? and where?

Myc

--- derekhawkins <derekhawkins@...> wrote:

> I bought a milling table from Enco (US) and modified
> it for minimal
> backlash and CNC on X and Y axis. Modified the drill
> press for CNC on
> the Z axis. Using DC geardhead motors retrofitted
> with encoders, a
> servo setup....TurboCNC is the software. Yes, there
> are photos.
>
> --- In Homebrew_PCBs@yahoogroups.com, Mycroft2152
> <mycroft2152@y...>
> wrote:
> > HI Derek,
> >
> > what design for the driller did you use? Any
> photos?
> >
> > I am told that some laser printers will shrink the
> > design slightly in one direction. Haven't had that
> > problem yet, still designing my machine.
> >
> > Myc
> >
> > --- derekhawkins <derekhawkins@y...> wrote:
> >
> > > Hi,
> > >
> > > Just finished putting together a CNC drilling
> > > machine and have now
> > > stumbled on a problem that I never
> > > anticipated....The drilling machine
> > > appears to be more accurate than the printer
> used
> > > for the PCB
> > > artwork....Tried both a HP2420 (laser) and Epson
> > > 2200 (Inkjet) and the
> > > results were similar. Is this a known issue with
> CNC
> > > setups?
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> >
> >
> > __________________________________
> > Discover Yahoo!
> > Get on-the-go sports scores, stock quotes, news
> and more. Check it
> out!
> > http://discover.yahoo.com/mobile.html
>
>
>

__________________________________
Discover Yahoo!
Use Yahoo! to plan a weekend, have fun online and more. Check it out!
http://discover.yahoo.com/

Derek,

DETAILS. DETAILS!

I was told by this learned group that this was impossible to do. You
proved them wrong. $70 for the mill table with a 12" x 5" work area
is great.

I'll buy one for manually drilling my pcbs.

Myc



--- In Homebrew_PCBs@yahoogroups.com, "derekhawkins"
<derekhawkins@y...> wrote:

> I bought a milling table from Enco (US) and modified it for

minimal

> backlash and CNC on X and Y axis. Modified the drill press for CNC

on

> the Z axis. Using DC geardhead motors retrofitted with encoders, a
> servo setup....TurboCNC is the software. Yes, there are photos.
>
> --- In Homebrew_PCBs@yahoogroups.com, Mycroft2152

<mycroft2152@y...>

> wrote:
> > HI Derek,
> >
> > what design for the driller did you use? Any photos?
> >
> > I am told that some laser printers will shrink the
> > design slightly in one direction. Haven't had that
> > problem yet, still designing my machine.
> >
> > Myc
> >
> > --- derekhawkins <derekhawkins@y...> wrote:
> >
> > > Hi,
> > >
> > > Just finished putting together a CNC drilling
> > > machine and have now
> > > stumbled on a problem that I never
> > > anticipated....The drilling machine
> > > appears to be more accurate than the printer used
> > > for the PCB
> > > artwork....Tried both a HP2420 (laser) and Epson
> > > 2200 (Inkjet) and the
> > > results were similar. Is this a known issue with CNC
> > > setups?
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> >
> >
> > __________________________________
> > Discover Yahoo!
> > Get on-the-go sports scores, stock quotes, news and more. Check

it

> out!
> > http://discover.yahoo.com/mobile.html

On Mon, 13 Jun 2005 22:56:10 +0200, mycroft2152 <mycroft2152@...>
wrote:

> Derek,
> DETAILS. DETAILS!
> I was told by this learned group that this was impossible to do. You
> proved them wrong. $70 for the mill table with a 12" x 5" work area
> is great.
> I'll buy one for manually drilling my pcbs.
> Myc

who told that? i've seen it before, can't be impossible!

ST

I have, just last week. :(

My Canon MP730 inkjet and Konica/Minolta 1350W are 'short' on distance for
SMD pads. They were just fine for thru-hole parts, but they lack slightly
on SMD precision. The part in question is a 30 pin FFC connector with a
pitch of 0.5mm. The output of the 2 printers above is about 1mm short on
total length.

I have to test a HP LaserJet 2000 and LaserJet 4V; hopefully these will
prove more accurate. If they fail as well, then I guess I had better get
that CNC-capable machine working pronto.

Robert
:(



-----Message d'origine-----
De : Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] De
la part de derekhawkins
Envoyé : juin 13 2005 11:39
À : Homebrew_PCBs@yahoogroups.com
Objet : [Homebrew_PCBs] Artwork for CNC drilling PCBs


Hi,

Just finished putting together a CNC drilling machine and have now
stumbled on a problem that I never anticipated....The drilling machine
appears to be more accurate than the printer used for the PCB
artwork....Tried both a HP2420 (laser) and Epson 2200 (Inkjet) and the
results were similar. Is this a known issue with CNC setups?








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

If Files or Photos are running short of space, post them here:
http://groups.yahoo.com/group/Homebrew_PCBs_Archives/
Yahoo! Groups Links

Thank you, going to check that out.

I'm making myself a full-size test pattern with 0.5mm precision both
vertically and horizontally.

Robert
:)


-----Message d'origine-----
De : Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] De
la part de Stefan Trethan
Envoyé : juin 13 2005 13:32
À : Homebrew_PCBs@yahoogroups.com
Objet : Re: [Homebrew_PCBs] Re: Artwork for CNC drilling PCBs


On Mon, 13 Jun 2005 19:29:06 +0200, Stefan Trethan <stefan_trethan@...>
wrote:

>
> lasers have distortion from rotational conversion i am told. inkjets
> should not have that.

Hey what i forgot to say:

download the service manual for your printer and do the feed/printing
alignment procedures. I had a trapezoid distortion and skew that went away
after doing that.

ST



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

If Files or Photos are running short of space, post them here:
http://groups.yahoo.com/group/Homebrew_PCBs_Archives/
Yahoo! Groups Links

On Mon, 13 Jun 2005 23:52:54 +0200, Robert Hedan
<robert.hedan@...> wrote:

> Thank you, going to check that out.
> I'm making myself a full-size test pattern with 0.5mm precision both
> vertically and horizontally.
> Robert

I made two boxes one inside the other, and simply put measurements on all
sides and diagonally.
Also, i put in the spaces in between stuff like groud planes and
spacing/min line width tests etc. (for testing the transfer).

But of course i have lost that test pattern too, in the HD failure...
AND the correction factors, now that i think of it. great. Well,
everything again then, i guess...
Do make backups, don't be stupid.



ST

--- In Homebrew_PCBs@yahoogroups.com, "mycroft2152" <mycroft2152@y...>
wrote:

> Derek,
>
> DETAILS. DETAILS!
>
> I was told by this learned group that this was impossible to do. You
> proved them wrong. $70 for the mill table with a 12" x 5" work area
> is great.

Not -this- group! For every time one person tells you something
doesn't work, a dozen will pop up and tell you they are already doing it.

I bought one of those Enco mill tables just to convert it, too.
Someday, in my spare time, apparently. :'/

Steve Greenfield

Don't know if it's a known problem, but something you could try is to:
- print out a test pattern
- etch it to a pcb
- program it to your cnc rig.

Then:
- stick a scriber bit into the cnc rig
- start the drilling run
- measure the errors in both directions
- convert these errors to x and y percentages

With this info, you'll have two different options:
1) transform the artwork prior to printing, so it
matches the CNC
2) transform the values in the drill file, prior to
submitting it to the CNC rig, so the drilling
matches the artwork.

Given that I'm comfortable with python scripting, I'd go for option 1,
and write a python/PIL script to transform the artwork.


derekhawkins wrote:

> Hi,
>
> Just finished putting together a CNC drilling machine and have now
> stumbled on a problem that I never anticipated....The drilling machine
> appears to be more accurate than the printer used for the PCB
> artwork....Tried both a HP2420 (laser) and Epson 2200 (Inkjet) and the
> results were similar. Is this a known issue with CNC setups?
>
>
>
>
>
>
>
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBs
>
> If Files or Photos are running short of space, post them here:
> http://groups.yahoo.com/group/Homebrew_PCBs_Archives/
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
>

--
Cheers
David

If you read all my posts you would see that I've done all that except
the etching . Threads are so difficult to follow in these groups. Why
etch when you can just use the artwork on paper and tape it to a
piece of board. Don't waste time etching anything during the
calibration phase.

--- In Homebrew_PCBs@yahoogroups.com, David McNab <david@r...> wrote:
> Don't know if it's a known problem, but something you could try is
to:
> - print out a test pattern
> - etch it to a pcb
> - program it to your cnc rig.
>
> Then:
> - stick a scriber bit into the cnc rig
> - start the drilling run
> - measure the errors in both directions
> - convert these errors to x and y percentages
>
> With this info, you'll have two different options:
> 1) transform the artwork prior to printing, so it
> matches the CNC
> 2) transform the values in the drill file, prior to
> submitting it to the CNC rig, so the drilling
> matches the artwork.
>
> Given that I'm comfortable with python scripting, I'd go for option
1,
> and write a python/PIL script to transform the artwork.
>
>
> derekhawkins wrote:
> > Hi,
> >
> > Just finished putting together a CNC drilling machine and have
now
> > stumbled on a problem that I never anticipated....The drilling
machine
> > appears to be more accurate than the printer used for the PCB
> > artwork....Tried both a HP2420 (laser) and Epson 2200 (Inkjet)
and the
> > results were similar. Is this a known issue with CNC setups?
> >
> >
> >
> >
> >
> >
> >
> >
> > Be sure to visit the group home and check for new Links, Files,
and Photos:
> > http://groups.yahoo.com/group/Homebrew_PCBs
> >
> > If Files or Photos are running short of space, post them here:
> > http://groups.yahoo.com/group/Homebrew_PCBs_Archives/
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
> --
> Cheers
> David

--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
<stefan_trethan@g...> wrote:

> On Mon, 13 Jun 2005 19:29:06 +0200, Stefan Trethan

<stefan_trethan@g...>

> wrote:
>
> >
> > lasers have distortion from rotational conversion i am told.
> > inkjets should not have that.
>
>
> Hey what i forgot to say:
>
> download the service manual for your printer and do the

feed/printing

> alignment procedures. I had a trapezoid distortion and skew that

went away

> after doing that.
>
> ST

It's worth a shot...Thanks! Only thing there is no downloadable SM
that I could find for my printer. Got to speak to someone at HP.

A milling table is just a dovetail cross slide positioner. However,
because there're designed for milling they tend to be large in mass
and heavy. But this actually works in your favor when it comes to
light drilling since due to the weight, drill motor vibrations do not
cause spurious movement in the backlash dead zone.

Spurious movement in the backlash dead zone is what makes backlash
(or the lack thereof) so critical in milling and routing operations
due to side forces on the cutting bit. This is far less of an issue
when drilling provided your software offers backlash compensation.
Also, optimizing the Excellon to G-code drill cycle conversion so
that one axis never reverses means zero backlash on that axis.

Naturally, you have to match the increased weight/friction of a
milling table with the necessary torque from your drives for any
desired speed. And this is where one has to be careful when using
steppers, you may end up losing steps without knowing it if your
desired speed is to ambitious. Not so with a step compatible servo
setup, it will fault immediately when the drive cannot keep up with
the step frequency.

--- In Homebrew_PCBs@yahoogroups.com, "mycroft2152"
<mycroft2152@y...> wrote:

> Derek,
>
> DETAILS. DETAILS!
>
> I was told by this learned group that this was impossible to do.

You

> proved them wrong. $70 for the mill table with a 12" x 5" work

area

> is great.
>
> I'll buy one for manually drilling my pcbs.
>
> Myc
>
>
>
> --- In Homebrew_PCBs@yahoogroups.com, "derekhawkins"
> <derekhawkins@y...> wrote:
> > I bought a milling table from Enco (US) and modified it for
> minimal
> > backlash and CNC on X and Y axis. Modified the drill press for

CNC

> on
> > the Z axis. Using DC geardhead motors retrofitted with encoders,

a

> > servo setup....TurboCNC is the software. Yes, there are photos.
> >
> > --- In Homebrew_PCBs@yahoogroups.com, Mycroft2152
> <mycroft2152@y...>
> > wrote:
> > > HI Derek,
> > >
> > > what design for the driller did you use? Any photos?
> > >
> > > I am told that some laser printers will shrink the
> > > design slightly in one direction. Haven't had that
> > > problem yet, still designing my machine.
> > >
> > > Myc
> > >
> > > --- derekhawkins <derekhawkins@y...> wrote:
> > >
> > > > Hi,
> > > >
> > > > Just finished putting together a CNC drilling
> > > > machine and have now
> > > > stumbled on a problem that I never
> > > > anticipated....The drilling machine
> > > > appears to be more accurate than the printer used
> > > > for the PCB
> > > > artwork....Tried both a HP2420 (laser) and Epson
> > > > 2200 (Inkjet) and the
> > > > results were similar. Is this a known issue with CNC
> > > > setups?
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> > > __________________________________
> > > Discover Yahoo!
> > > Get on-the-go sports scores, stock quotes, news and more. Check
> it
> > out!
> > > http://discover.yahoo.com/mobile.html

> DETAILS. DETAILS!

Some photos of the CNC setup are here;

http://www.pbase.com/eldata/cnc

> I'll buy one for manually drilling my pcbs.

Some photos of that particular $70.00 Enco table used for manual
drilling are here;

http://www.pbase.com/eldata/drill

--- In Homebrew_PCBs@yahoogroups.com, "mycroft2152"
<mycroft2152@y...> wrote:

> Derek,
>
> DETAILS. DETAILS!
>
> I was told by this learned group that this was impossible to do.

You

> proved them wrong. $70 for the mill table with a 12" x 5" work

area

> is great.
>
> I'll buy one for manually drilling my pcbs.
>
> Myc
>
>
>
> --- In Homebrew_PCBs@yahoogroups.com, "derekhawkins"
> <derekhawkins@y...> wrote:
> > I bought a milling table from Enco (US) and modified it for
> minimal
> > backlash and CNC on X and Y axis. Modified the drill press for

CNC

> on
> > the Z axis. Using DC geardhead motors retrofitted with encoders,

a

> > servo setup....TurboCNC is the software. Yes, there are photos.
> >
> > --- In Homebrew_PCBs@yahoogroups.com, Mycroft2152
> <mycroft2152@y...>
> > wrote:
> > > HI Derek,
> > >
> > > what design for the driller did you use? Any photos?
> > >
> > > I am told that some laser printers will shrink the
> > > design slightly in one direction. Haven't had that
> > > problem yet, still designing my machine.
> > >
> > > Myc
> > >
> > > --- derekhawkins <derekhawkins@y...> wrote:
> > >
> > > > Hi,
> > > >
> > > > Just finished putting together a CNC drilling
> > > > machine and have now
> > > > stumbled on a problem that I never
> > > > anticipated....The drilling machine
> > > > appears to be more accurate than the printer used
> > > > for the PCB
> > > > artwork....Tried both a HP2420 (laser) and Epson
> > > > 2200 (Inkjet) and the
> > > > results were similar. Is this a known issue with CNC
> > > > setups?
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> > > __________________________________
> > > Discover Yahoo!
> > > Get on-the-go sports scores, stock quotes, news and more. Check
> it
> > out!
> > > http://discover.yahoo.com/mobile.html

On Tue, 14 Jun 2005 15:12:26 +0200, derekhawkins <derekhawkins@...>
wrote:

> If you read all my posts you would see that I've done all that except
> the etching . Threads are so difficult to follow in these groups. Why
> etch when you can just use the artwork on paper and tape it to a
> piece of board. Don't waste time etching anything during the
> calibration phase.

As long as you do not add error in getting the layout on the board, or
like use another paper then that shrinks different, it should be the same,
yes. Etching itself will of course not add distortion, so you can stop
short of that.

ST

On Tue, 14 Jun 2005 15:14:24 +0200, derekhawkins <derekhawkins@...>
wrote:

>
> It's worth a shot...Thanks! Only thing there is no downloadable SM
> that I could find for my printer. Got to speak to someone at HP.

I found mine here:

<http://www.eserviceinfo.com/>

the manufacturers often expect you to pay for a service manual.


ST

Stefan, that web site is a gold mine even though I still can't find
anything for my printer. Thanks!

--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
<stefan_trethan@g...> wrote:

> On Tue, 14 Jun 2005 15:14:24 +0200, derekhawkins <derekhawkins@y...>
> wrote:
>
> >
> > It's worth a shot...Thanks! Only thing there is no downloadable SM
> > that I could find for my printer. Got to speak to someone at HP.
>
>
> I found mine here:
>
> <http://www.eserviceinfo.com/>
>
> the manufacturers often expect you to pay for a service manual.
>
>
> ST

HI Derek,

Many thanks!

Very nice drill press, where did yu buy it?

Myc

--- derekhawkins <derekhawkins@...> wrote:

> > DETAILS. DETAILS!
>
> Some photos of the CNC setup are here;
>
> http://www.pbase.com/eldata/cnc
>
> > I'll buy one for manually drilling my pcbs.
>
> Some photos of that particular $70.00 Enco table
> used for manual
> drilling are here;
>
> http://www.pbase.com/eldata/drill
>
> --- In Homebrew_PCBs@yahoogroups.com, "mycroft2152"
> <mycroft2152@y...> wrote:
> > Derek,
> >
> > DETAILS. DETAILS!
> >
> > I was told by this learned group that this was
> impossible to do.
> You
> > proved them wrong. $70 for the mill table with a
> 12" x 5" work
> area
> > is great.
> >
> > I'll buy one for manually drilling my pcbs.
> >
> > Myc
> >
> >
> >
> > --- In Homebrew_PCBs@yahoogroups.com,
> "derekhawkins"
> > <derekhawkins@y...> wrote:
> > > I bought a milling table from Enco (US) and
> modified it for
> > minimal
> > > backlash and CNC on X and Y axis. Modified the
> drill press for
> CNC
> > on
> > > the Z axis. Using DC geardhead motors
> retrofitted with encoders,
> a
> > > servo setup....TurboCNC is the software. Yes,
> there are photos.
> > >
> > > --- In Homebrew_PCBs@yahoogroups.com,
> Mycroft2152
> > <mycroft2152@y...>
> > > wrote:
> > > > HI Derek,
> > > >
> > > > what design for the driller did you use? Any
> photos?
> > > >
> > > > I am told that some laser printers will shrink
> the
> > > > design slightly in one direction. Haven't had
> that
> > > > problem yet, still designing my machine.
> > > >
> > > > Myc
> > > >
> > > > --- derekhawkins <derekhawkins@y...> wrote:
> > > >
> > > > > Hi,
> > > > >
> > > > > Just finished putting together a CNC
> drilling
> > > > > machine and have now
> > > > > stumbled on a problem that I never
> > > > > anticipated....The drilling machine
> > > > > appears to be more accurate than the printer
> used
> > > > > for the PCB
> > > > > artwork....Tried both a HP2420 (laser) and
> Epson
> > > > > 2200 (Inkjet) and the
> > > > > results were similar. Is this a known issue
> with CNC
> > > > > setups?
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > >
> > > > __________________________________
> > > > Discover Yahoo!
> > > > Get on-the-go sports scores, stock quotes,
> news and more. Check
> > it
> > > out!
> > > > http://discover.yahoo.com/mobile.html
>
>
>

__________________________________________________
Do You Yahoo!?
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Bought the one in the CNC shots from the maker....Cameron (aka Treat
Enterprises)....It's a modified MD-70.

http://www.cameronmicrodrillpress.com/presses.html



--- In Homebrew_PCBs@yahoogroups.com, Mycroft2152 <mycroft2152@y...>
wrote:

> HI Derek,
>
> Many thanks!
>
> Very nice drill press, where did yu buy it?
>
> Myc
>
> --- derekhawkins <derekhawkins@y...> wrote:
>
> > > DETAILS. DETAILS!
> >
> > Some photos of the CNC setup are here;
> >
> > http://www.pbase.com/eldata/cnc
> >
> > > I'll buy one for manually drilling my pcbs.
> >
> > Some photos of that particular $70.00 Enco table
> > used for manual
> > drilling are here;
> >
> > http://www.pbase.com/eldata/drill
> >
> > --- In Homebrew_PCBs@yahoogroups.com, "mycroft2152"
> > <mycroft2152@y...> wrote:
> > > Derek,
> > >
> > > DETAILS. DETAILS!
> > >
> > > I was told by this learned group that this was
> > impossible to do.
> > You
> > > proved them wrong. $70 for the mill table with a
> > 12" x 5" work
> > area
> > > is great.
> > >
> > > I'll buy one for manually drilling my pcbs.
> > >
> > > Myc
> > >
> > >
> > >
> > > --- In Homebrew_PCBs@yahoogroups.com,
> > "derekhawkins"
> > > <derekhawkins@y...> wrote:
> > > > I bought a milling table from Enco (US) and
> > modified it for
> > > minimal
> > > > backlash and CNC on X and Y axis. Modified the
> > drill press for
> > CNC
> > > on
> > > > the Z axis. Using DC geardhead motors
> > retrofitted with encoders,
> > a
> > > > servo setup....TurboCNC is the software. Yes,
> > there are photos.
> > > >
> > > > --- In Homebrew_PCBs@yahoogroups.com,
> > Mycroft2152
> > > <mycroft2152@y...>
> > > > wrote:
> > > > > HI Derek,
> > > > >
> > > > > what design for the driller did you use? Any
> > photos?
> > > > >
> > > > > I am told that some laser printers will shrink
> > the
> > > > > design slightly in one direction. Haven't had
> > that
> > > > > problem yet, still designing my machine.
> > > > >
> > > > > Myc
> > > > >
> > > > > --- derekhawkins <derekhawkins@y...> wrote:
> > > > >
> > > > > > Hi,
> > > > > >
> > > > > > Just finished putting together a CNC
> > drilling
> > > > > > machine and have now
> > > > > > stumbled on a problem that I never
> > > > > > anticipated....The drilling machine
> > > > > > appears to be more accurate than the printer
> > used
> > > > > > for the PCB
> > > > > > artwork....Tried both a HP2420 (laser) and
> > Epson
> > > > > > 2200 (Inkjet) and the
> > > > > > results were similar. Is this a known issue
> > with CNC
> > > > > > setups?
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > __________________________________
> > > > > Discover Yahoo!
> > > > > Get on-the-go sports scores, stock quotes,
> > news and more. Check
> > > it
> > > > out!
> > > > > http://discover.yahoo.com/mobile.html
> >
> >
> >
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com