Alan Condit wrote: > Hi all, > > I am trying to figure out Cutter radius compensation. And everything > I try seems to be wrong. The example in the manual even reports > "Concave corner with cutter radius comp". I have written a short > program to cut the outline of a gate handle and it reports Cutter > gouging with cutter radius. Can someone take a look at it and tell > me what I am doing wrong. T4 is a 1/4" cutter. > > (GateHandle) > G17 G20 > G00Z3.0 > T4 M06 > G01 G40 X0.0 Y-0.8 F50.0 > G01 G41 D4 X0.0 Y-0.4 (COMP LEAD IN) > G01 X0.0 Y0.0 F50.0 (real start of part) > Z2.5 > G01Z2.25F25.0 What line does it croak on? Just for a different perspective, here's something I wrote years ago. I have used this as my own reference example whenever I need to figure it out again.
http://www.timgoldstein.com/cad_cam/diacomp.htm When in doubt, I would put a ballpoint pen in the spindle and a sheet of paper on the vise, and run the program, first with a zero-diameter tool, and then again with the correct tool diameter in the tool table. You will note that the lead-in and lead-out points were chosen so if the part extended that far it would have gouged the corner a little. This is to prevent EMC from complaining about the radius of the inside corners. I see your program uses the I,J form of arc specification, and only 3 fractional digits of precision. That can cause errors even without the radius comp turned on. I always use the R form for arcs, because there can be no roundoff error that makes the starting and ending radius appear different. The I,J form over-constrains the arc, and any roundoff error makes in impossible to create any circular arc that meets the specified coordinates. Jon ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
