[Coco] Proto CoCo

[jdaggett at gate.net]

Gene 

Any board routing that is needed to plug into the MPI or Expansion slot that I do 
would be done by hand. I don't own a mill let alone a CNC mill. 

james

On 28 Aug 2006 at 13:43, Gene Heskett wrote:

> Who needs flushcut?  Or a jig other than to hold it in a repeatable 
> position from one board to the next?  Thats what cnc does, accurately
> driving the cutting bit to near .0001" accuracies, and dremel sells little
> 1/8" solid carbide bits for, called grout routing bits.  I've carved lots
> of steel parts with a couple of them.  They also have one that tapers 1/8"
> down to a 1/16" roundnose, but in brass I found it just plows up the edge
> of the groove way above the surface of the brass if I try for more than
> about .003" of depth per cutter pass, like when carving brass nameplates
> etc.  So using that bit is a bit like watching paint dry or grass grow for
> a "President" nameplate.  In FR4 pcb material, I expect a pass with a 14"
> mill bastard file at an angle across the edges might be in order to remove
> the glass hair left at the board/air interfaces.