Chuck
If you are only doing a few PCBs then HSS drills are cheap enough to throw away after each board drilled.
I use a Missed Hole drill I made from a 12V DC motor and a pin chuck for the odd hole, or you could build one of your own. Photos in my album MParker-Lisberg:
<
http://groups.yahoo.com/group/Homebrew_PCBs/photos/album/783475915/pic/list>
and video at:
<
http://www.youtube.com/watch?v=AhlRkO0EcFo>
You need a low run out and no spindle feed backlash to use carbide drills..
Malcolm
I don't suffer from insanity I enjoy it!
--- On Sun, 10/16/11, Chuck <c.knight@...> wrote:
From: Chuck <c.knight@...>
Subject: [Homebrew_PCBs] VERY FIRST PCB -- SUCCESSFUL!!!
To: Homebrew_PCBs@yahoogroups.com
Date: Sunday, October 16, 2011, 2:13 AM
I just made my very first PCB at home!!! Hooray!
http://www.instructables.com/id/Easy-to-build-CNC-Mill-Stepper-Motor-and-Driver-ci/
I made the "Easy Stepper" board from Instructables, and could not easily get etchant out where I live, so I used the toilet bowl cleaner/peroxide mix. Worked quite well, actually.
And, I did it as LASER toner transfer, using magazine paper. Talk about low tech!
Apparently it really ∗is∗ possible to make boards, at home, and affordably. Next step is going to be drilling them out.
I have 1/16" drill bits that would fit my drill press, or my Dremel...and I have a 0.7mm solid carbide bit that fits either as well. My concern is runout and precision...carbide is very VERY brittle, and I have only one bit.
Any hints for a first timer?
THANKS!
Chuck
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