At 11:21 AM 11/18/96 -0500, terogers wrote:
>Larry G. Nelson Sr. wrote:
>
>> The problem with these is the tooling cost. The drills are OK but the
>> special mills that outlinre the traces are expensive. They do last quite a
>> while. The tools with a short life are if you want to do a board rubout of
>> unused copper or another "outline" with the end mill to make a wider
>> isolation path. The end mills in that size are expensive and wear out fast.
>
>Actually, what you need to do is learn to sharpen the things. I used a
>diamond hone and a "vision aid" to see the edge. Most of the machines
>I've seen use a pointed bit, and the tip geometry is so simple that
>sharpening is pretty easy.
>
>-- Tom Rogers  Time Tech Inc.
>
>
This is true for the main mill from T-Tech for example but the end mills are
too tiny.
Larry G. Nelson Sr.
L.Nelson@ieee.org
http://www.ultranet.com/~nr