Drilling from below presents no problems. I have used the professional version from Megauk, see half way down the page:
<
http://www.megauk.com/pcb_drilling_machines.php>
But at that price, it is out of range of most of the home users. Making one should not preset too many problems.
Malcolm
I don't suffer from insanity I enjoy it!
Mene, mene, tekel, upharsin
The writing is on the wall.
________________________________
From: Harvey White <
madyn@...>
To:
Homebrew_PCBs@yahoogroups.com Sent: Wednesday, January 2, 2013 2:29 PM
Subject: Re: [Homebrew_PCBs] circuit board drilling question
On Wed, 2 Jan 2013 06:33:41 -0700, you wrote:
>I can see how holding the board down with the drill coming up through it
>would be a problem.
So can I. The approach was to use a vacuum, but there are mechanical
problems, as in not enough suction at the moment. I have more
mechanical work to do. Sadly enough, the microprocessor, drill,
mechanical work to get it to go up and down properly, all that lovely
stuff was relatively trivial.
Another option might be a clamping foot or bar. Problem is that it
would cause some vibration, and that might move the board.
Harvey
>
>Rick
>
>-----Original Message-----
>From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
>On Behalf Of Harvey White
>Sent: Tuesday, January 01, 2013 9:47 PM
>To: Homebrew_PCBs@yahoogroups.com
>Subject: Re: [Homebrew_PCBs] circuit board drilling question
>
>On Tue, 1 Jan 2013 20:55:39 -0700, you wrote:
>
>>Has anyone played with putting a high intensity LED pointing up through
>>the drill press table so it would be easier to see the circuit board
>>land before drilling?
>
>I've played with a TV camera pointing up (in my case, down) at the PC board
>with a pair of cross hairs on the monitor. The drill moves upwards. Main
>problem is a good method to hold the board down.
>
>Harvey
>
>>
>>
>>
>>Rick
>>
>>
>>
>>[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]