Colin,
I still think the best bet is to interpolate from tool center.
I circular interpolate, thread mill, and helix mill this way
with no problems. I calculate in the tool dia. for the operator
so they don't have to. The only adjustment they make would
be for the tool diameter being off a few thousanths. It comes
out right every time. Here is a typical example.
 
N665 M106 (1" DIA. SANDVIK CORO-MILL TOOL 69)
N670 T47 M08
N675 G00 X1.031 Y-3.938 S5730 M03
N680 G43 Z0.0 H69
N685 Z-0.9
N690 Z-1.125 F25.0
N695 G41 D69
N700 X1.181 Y-4.038
N705 G03 X1.281 Y-3.938 I0.0 J0.1
N710 G03 X1.281 Y-3.938 I-0.25 J0.0
N715 G03 X1.181 Y-3.838 I-0.1 J0.0
N720 G01 X1.031 Y-3.938
N725 G00 Z-0.9
N730 G40
N735 M107
 
Hope this helps.
I can send you some .pm4 examples if you like.
 
Jeff Pieper
EATON Hydraulics
Petersburg, IL
 
 
 
I need to program a slot that is 1.67 long and .75 wide using a 1/2 dia. endmill. I would like to plunge at one end of the slot and in the center then go around the slot. When I use the cutter comp., it looks like the tool is being offset and starting off center.
 
Thank you
Colin Williams
 

Reply via email to