Thanks, Jan. I must be doing something wrong. Then gain, the bit is not
for plexiglass or plastics, and ths speed might be too high. The
particular board which needs drilling is actually for the mechanical part
of the project. It has Thousands of holes, several hundred per square
inch. I've never been to a PC=drilling operation. How fast do they
drill out the boards? I'm looking at buying some kind of CNC machine
sistem for light work: something like the stuff from Taig Tools or Prazi.
Charles
---
>Charles: No. The material does NOT do this. Of course, the bits must
be
>clean and sharp at the outset, but a good sharp carbide bit will not accumu=
>late=20
>either copper nor glass-epoxy, perhaps partly as the two are not MISCIBLE.
>
>You should find a "local PCB house" and get invited to come see their=20
>Excellon (or whichever) CNC PCB-drill going at it! It will blow you away! =
> And they=20
>can show you their NEW bit-inventory and the USED-BUT-STILL-USEABLE=20
>bit-inventory, and discuss with you whether they sharpen ("recondition") or=
> just throw=20
>OUT the used bits (Some GOOD houses do BOTH!).
>
>If you watch for goodies, you MIGHT discover, as I did, that they TRASH=20
>anything 4" and narrower. I got enough FR-4 between 4.25" and 3.8" to last=
> ME for=20
>a long, long time in my home-brew stuff, last time I visited the local=20
>"house"! Of course, most of it is only =BD-oz., but it's still good enough=
> for=20
>tinkering!
>
>Jan Rowland
>
>
>[Non-text portions of this message have been removed]
>
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