Jon, Thanks for replying. In fact the example that you cite is the one that I tried which reported "Concave corner with cutter radius comp" error. In my code it appears to barf on either the line where cutter comp is turned on or the one immediately after it. Interestingly, axis seems to draw the correct tool path and it runs OK on the simulator.
The reason that I put the whole program in was that I hoped someone could run it (cutting air) and show me what I am doing wrong. Alan > 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
