Homebrew PCBs

Could anyone offer an opinion on this drilling fixture? 

http://www.imajeenyus.com/electronics/20080628_pcb_drilling_viewer/index.shtml

I can see that it shows the pad and hole on the copper side, but I can't understand how you align the drill bit with respect to the fixture because you can't see the dot until the hole is drilled.

He also has a nice surface mount soldering aid under electronics.

Baxter

The cross-hairs on the view finder show where the hole will be, once it is
made.  No need to see the bit, the two are aligned.

On Mon, Apr 16, 2012 at 2:30 PM, bebx2000 <bebx2000@...> wrote:

> **
>
>
> Could anyone offer an opinion on this drilling fixture?
>
>
> http://www.imajeenyus.com/electronics/20080628_pcb_drilling_viewer/index.shtml
>
> I can see that it shows the pad and hole on the copper side, but I can't
> understand how you align the drill bit with respect to the fixture because
> you can't see the dot until the hole is drilled.
>
> He also has a nice surface mount soldering aid under electronics.
>
> Baxter
>
>  
>


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

Shannon is correct, once you have made you initial alignment, without a PCB in place, i.e. just looking at the drill bit through the drill stands base plate hole, getting the cross hairs matching up with the tip of the drill bit,and the frame secured, it will remain aligned, you then move the PCB around to line up the Pad with the cross hairs, the bit will drill at exactly that point every time. great web site by the way, plenty of interesting projects!!
David

--- In Homebrew_PCBs@yahoogroups.com, Shannon Haworth <shannon.haworth@...> wrote:

>
> The cross-hairs on the view finder show where the hole will be, once it is
> made.  No need to see the bit, the two are aligned.
> 
> On Mon, Apr 16, 2012 at 2:30 PM, bebx2000 <bebx2000@...> wrote:
> 
> > **
> >
> >
> > Could anyone offer an opinion on this drilling fixture?
> >
> >
> > http://www.imajeenyus.com/electronics/20080628_pcb_drilling_viewer/index.shtml
> >
> > I can see that it shows the pad and hole on the copper side, but I can't
> > understand how you align the drill bit with respect to the fixture because
> > you can't see the dot until the hole is drilled.
> >
> > He also has a nice surface mount soldering aid under electronics.
> >
> > Baxter
> >
> >  
> >
> 
> 
> [Non-text portions of this message have been removed]
>

Baxter

Thanks, but not particularly for the viewer, but all the other articles on the page.

Malcolm

 
I don't suffer from insanity I enjoy it!
Mene, mene, tekel, upharsin
The writing is on the wall.


________________________________

 From: bebx2000 <bebx2000@...>
To: Homebrew_PCBs@yahoogroups.com 
Sent: Monday, April 16, 2012 7:30 PM
Subject: [Homebrew_PCBs] PCB Drilling Viewer
 

  
Could anyone offer an opinion on this drilling fixture? 

http://www.imajeenyus.com/electronics/20080628_pcb_drilling_viewer/index.shtml

I can see that it shows the pad and hole on the copper side, but I can't understand how you align the drill bit with respect to the fixture because you can't see the dot until the hole is drilled.

He also has a nice surface mount soldering aid under electronics.

Baxter


 

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

I am sorry, but I don't see any mention of cross-hairs in his implementation. My take on this is that he is blackening the circular insert, positioning the fixture and bit and drilling a hole for alignment. The PCB is then positioned to get the pad concentric with the drilled insert hole.

Baxter

bebx2000 wrote:
>   
> Could anyone offer an opinion on this drilling fixture? 


Hi, i remember some old discussions on this list about a drill press
that I could never understand how it works, until saw that image. I
tried to search the thread but i lack time right know.

If i understand it right, and in my modest opinion, it intends to drill
the single sided board from the non copper side, because the drill bit
tends to slide if drilled from the copper (if it hasn't a etch hole for
drilling) and avoids the annoying burrs on copper. It has a light to
illuminate the bottom side of the board and when it cross the glass it
will behave like a mirror to your point of view, because it has more
light from the other side, and you see the down side of the pcb with the
alignment hole. There are who adds a mirror so you can see the bottom of
the pcb from above, in a comfortable position.

But i, before the cnc, just bought a proxxon drill stand and both a
collet chuck proxxon spindle for carbide bits and another with 3 jaw
keyless chuck from proxxon too for hss and other tools. All the pcb's i
hand drilled had the etched hole, never went through this.

On Mon, 16 Apr 2012 23:39:08 +0100, you wrote:

>bebx2000 wrote:
>>   
>> Could anyone offer an opinion on this drilling fixture? 
>
>
>Hi, i remember some old discussions on this list about a drill press
>that I could never understand how it works, until saw that image. I
>tried to search the thread but i lack time right know.
>
>If i understand it right, and in my modest opinion, it intends to drill
>the single sided board from the non copper side, because the drill bit
>tends to slide if drilled from the copper (if it hasn't a etch hole for
>drilling) and avoids the annoying burrs on copper. It has a light to
>illuminate the bottom side of the board and when it cross the glass it
>will behave like a mirror to your point of view, because it has more
>light from the other side, and you see the down side of the pcb with the
>alignment hole. There are who adds a mirror so you can see the bottom of
>the pcb from above, in a comfortable position.
>
>But i, before the cnc, just bought a proxxon drill stand and both a
>collet chuck proxxon spindle for carbide bits and another with 3 jaw
>keyless chuck from proxxon too for hss and other tools. All the pcb's i
>hand drilled had the etched hole, never went through this. 

Agreed on the Proxxon.  However, I have a design where I am
implementing the bottom drill with a Proxxon.  Main problem right now
is the board holddown.  

Harvey

>
>

A figure of speech, sorry, your implementation, is the same as the "cross hair" explanation, the base of the drill press will already have a hole lined up with the drill bit, the "viewer" just lines up with that hole, he added a small plastic insert to his assembly with a black ring drawn on it to reduce the appature for greater accuracy. the light would shine through the FR4 copperless areas pinpointing each pad, with my failing eyesight it might be worth a try!! 

David 

--- In Homebrew_PCBs@yahoogroups.com, "bebx2000" <bebx2000@...> wrote:

>
> 
> 
> I am sorry, but I don't see any mention of cross-hairs in his implementation. My take on this is that he is blackening the circular insert, positioning the fixture and bit and drilling a hole for alignment. The PCB is then positioned to get the pad concentric with the drilled insert hole.
> 
> Baxter
>

I described setting up a web cam to view the bottom side of the PCB 
while drilling from the top side.  I use a sacrificial piece of plastic 
that I drill first so it indicates exactly where the drill is hitting.  
That eliminates a host of problems such as boresight error.
Please see:
http://tech.dir.groups.yahoo.com/group/Homebrew_PCBs/message/28429
and I put pictures in
top drill-bottom view drill press.pdf 
<http://f1.grp.yahoofs.com/v1/gLKMT4q13XDxiIgzZmifkT0BbqsHILZSk-F9mp_Cbr7hpFKpq63z_9WqZR4coro9pOPQAfkru-t0SpL73lbMtWYcu0eHtV598w/top%20drill-bottom%20view%20drill%20press.pdf>
in the files section.

On 4/16/2012 3:39 PM, Simao Cardoso wrote:
>
> bebx2000 wrote:
> >
> > Could anyone offer an opinion on this drilling fixture?
>
> Hi, i remember some old discussions on this list about a drill press
> that I could never understand how it works, until saw that image. I
> tried to search the thread but i lack time right know.
>
> If i understand it right, and in my modest opinion, it intends to drill
> the single sided board from the non copper side, because the drill bit
> tends to slide if drilled from the copper (if it hasn't a etch hole for
> drilling) and avoids the annoying burrs on copper. It has a light to
> illuminate the bottom side of the board and when it cross the glass it
> will behave like a mirror to your point of view, because it has more
> light from the other side, and you see the down side of the pcb with the
> alignment hole. There are who adds a mirror so you can see the bottom of
> the pcb from above, in a comfortable position.
>
> But i, before the cnc, just bought a proxxon drill stand and both a
> collet chuck proxxon spindle for carbide bits and another with 3 jaw
> keyless chuck from proxxon too for hss and other tools. All the pcb's i
> hand drilled had the etched hole, never went through this.
>
>

In a message dated 4/16/2012 19:29:54 Central Daylight Time,  
charles.r.patton@... writes:

_http://f1.grp.yahoofs.com/v1/gLKMT4q13XDxiIgzZmifkT0BbqsHILZSk-F9mp_Cbr7hpF
Kpq63z_9WqZR4coro9pOPQAfkru-t0SpL73lbMtWYcu0eHtV598w/top%20drill-bottom%20vi
ew%20drill%20press.pdf_ 
(http://f1.grp.yahoofs.com/v1/gLKMT4q13XDxiIgzZmifkT0BbqsHILZSk-F9mp_Cbr7hpFKpq63z_9WqZR4coro9pOPQAfkru-t0SpL73lbMtWYcu0eHtV598w
/top%20drill-bottom%20view%20drill%20press.pdf) <<
Doesn't work!

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

Those file URLs with long strings of apparently random characters are temporary and disappear after a few seconds to a few minutes. 

The file in in the group's files section: <http://tech.groups.yahoo.com/group/Homebrew_PCBs/files/> top drill-bottom view drill press.pdf (yet another good example for naming files without spaces in them.)

Donald.
--
*Plain Text* email -- it's an accessibility issue
()  no proprietary attachments; no html mail
/\  ascii ribbon campaign - <www.asciiribbon.org>

----- Original Message -----

> From: "Charles R. Patton" <charles.r.patton@...>
> To: "Homebrew PCBs" <Homebrew_PCBs@yahoogroups.com>
> Sent: Monday, April 16, 2012 8:29:43 PM
> Subject: Re: [Homebrew_PCBs] PCB Drilling Viewer
> I described setting up a web cam to view the bottom side of the PCB
> while drilling from the top side. I use a sacrificial piece of plastic
> that I drill first so it indicates exactly where the drill is hitting.
> That eliminates a host of problems such as boresight error.
> Please see:
> http://tech.dir.groups.yahoo.com/group/Homebrew_PCBs/message/28429
> and I put pictures in
> top drill-bottom view drill press.pdf
> <http://f1.grp.yahoofs.com/v1/gLKMT4q13XDxiIgzZmifkT0BbqsHILZSk-F9mp_Cbr7hpFKpq63z_9WqZR4coro9pOPQAfkru-t0SpL73lbMtWYcu0eHtV598w/top%20drill-bottom%20view%20drill%20press.pdf>
> in the files section.
> 
> On 4/16/2012 3:39 PM, Simao Cardoso wrote:
> >
> > bebx2000 wrote:
> > >
> > > Could anyone offer an opinion on this drilling fixture?
> >
> > Hi, i remember some old discussions on this list about a drill press
> > that I could never understand how it works, until saw that image. I
> > tried to search the thread but i lack time right know.
> >
> > If i understand it right, and in my modest opinion, it intends to
> > drill
> > the single sided board from the non copper side, because the drill
> > bit
> > tends to slide if drilled from the copper (if it hasn't a etch hole
> > for
> > drilling) and avoids the annoying burrs on copper. It has a light to
> > illuminate the bottom side of the board and when it cross the glass
> > it
> > will behave like a mirror to your point of view, because it has more
> > light from the other side, and you see the down side of the pcb with
> > the
> > alignment hole. There are who adds a mirror so you can see the
> > bottom of
> > the pcb from above, in a comfortable position.
> >
> > But i, before the cnc, just bought a proxxon drill stand and both a
> > collet chuck proxxon spindle for carbide bits and another with 3 jaw
> > keyless chuck from proxxon too for hss and other tools. All the
> > pcb's i
> > hand drilled had the etched hole, never went through this.
> >
> >
> 
> 
> 
> ------------------------------------
> 
> 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 the alphabet soup URLs.  My apologies.  I learned a couple of things 
from this episode.  I had done a quick search, copy and paste from 
Google for the articles I had done earlier.  They pasted fine as HTML 
links hiding the goobly gook underneath the link.  That coupled with 
another action -- I emailed using a Gmail account.  It now appears that 
Gmail didn't repeat back my tech group message from Yahoo, probably due 
to matching source and destination email addresses in order to save 
server disk storage space.  So I wasn't aware of the terrible mess the 
URLs were until someone else commented on it.  I will be more careful in 
the future.
Regards,
Charles R. Patton

  On 4/17/2012 5:04 AM, Donald H Locker wrote:
>
> Those file URLs with long strings of apparently random characters are 
> temporary and disappear after a few seconds to a few minutes.
>
> The file in in the group's files section: 
> <http://tech.groups.yahoo.com/group/Homebrew_PCBs/files/> top 
> drill-bottom view drill press.pdf (yet another good example for naming 
> files without spaces in them.)
>
> Donald.
> --
> *Plain Text* email -- it's an accessibility issue
> () no proprietary attachments; no html mail
> /\ ascii ribbon campaign - <www.asciiribbon.org>
>
> ----- Original Message -----
> > From: "Charles R. Patton" <charles.r.patton@... 
> <mailto:charles.r.patton%40IEEE.ORG>>
> > To: "Homebrew PCBs" <Homebrew_PCBs@yahoogroups.com 
> <mailto:Homebrew_PCBs%40yahoogroups.com>>
> > Sent: Monday, April 16, 2012 8:29:43 PM
> > Subject: Re: [Homebrew_PCBs] PCB Drilling Viewer
> > I described setting up a web cam to view the bottom side of the PCB
> > while drilling from the top side. I use a sacrificial piece of plastic
> > that I drill first so it indicates exactly where the drill is hitting.
> > That eliminates a host of problems such as boresight error.
> > Please see:
> > http://tech.dir.groups.yahoo.com/group/Homebrew_PCBs/message/28429
> > and I put pictures in
> > top drill-bottom view drill press.pdf
> > 
> <http://f1.grp.yahoofs.com/v1/gLKMT4q13XDxiIgzZmifkT0BbqsHILZSk-F9mp_Cbr7hpFKpq63z_9WqZR4coro9pOPQAfkru-t0SpL73lbMtWYcu0eHtV598w/top%20drill-bottom%20view%20drill%20press.pdf>
> > in the files section.
> >
> > On 4/16/2012 3:39 PM, Simao Cardoso wrote:
> > >
> > > bebx2000 wrote:
> > > >
> > > > Could anyone offer an opinion on this drilling fixture?
> > >
> > > Hi, i remember some old discussions on this list about a drill press
> > > that I could never understand how it works, until saw that image. I
> > > tried to search the thread but i lack time right know.
> > >
> > > If i understand it right, and in my modest opinion, it intends to
> > > drill
> > > the single sided board from the non copper side, because the drill
> > > bit
> > > tends to slide if drilled from the copper (if it hasn't a etch hole
> > > for
> > > drilling) and avoids the annoying burrs on copper. It has a light to
> > > illuminate the bottom side of the board and when it cross the glass
> > > it
> > > will behave like a mirror to your point of view, because it has more
> > > light from the other side, and you see the down side of the pcb with
> > > the
> > > alignment hole. There are who adds a mirror so you can see the
> > > bottom of
> > > the pcb from above, in a comfortable position.
> > >
> > > But i, before the cnc, just bought a proxxon drill stand and both a
> > > collet chuck proxxon spindle for carbide bits and another with 3 jaw
> > > keyless chuck from proxxon too for hss and other tools. All the
> > > pcb's i
> > > hand drilled had the etched hole, never went through this.
> > >
> > >
> >
> >
> >
> > ------------------------------------
> >
> > 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]