On 01/26/2019 07:15 PM, Gene Heskett wrote:
Why can't I drill a .209" diameter hole with a 4mm (.157")
tool?
Well, I do this sort of thing all the time.
Try downloading the first program on this page
http://pico-systems.com/gcode.html
or the next to last (make ring). These should compile on
any LinuxCNC system with :
cc -o progname progname.c
You will need to edit in a spindle speed command. Now,
these do NOT use cutter radius compensation, I don't see the
point.
But, the radius compensation works on RADIUS, not diameter,
so there's no problem as long as the cutter radius is less
than the hole radius. However, the lead-in and lead-out
moves are TRICKY! The problem is that you have to make sure
the inside corner never "pinches" the inside part of the
curve. If the tool radius is pretty close to the hole
radius, then the selection of the lead-in point (and
lead-out, too) is REALLY tricky. You probably need to use
arc lead-ins and lead-outs to solve it inside a small hole.
Jon
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