https://forums.autodesk.com/t5/hsm-forum/boring-an-internal-hole/m-p/6099780#M16223 OK. My code worked fine.&nbsp; <BR /><BR />Just completed a batch of 20 PVC parts using my modified boring routine, and a standard unmodified HSMWorks generated OD Turn routine.<BR /><BR />Since I generated these codes, I have worked out how to do a finish cut in the reverse direction.&nbsp; My mistake was that I used a single combined roughing and finishing routine.&nbsp; Next time, I will code separate routines for the roughing passes from right to left and the finish passes from left to right.&nbsp; That will stop the big chip from being cut during the shoulder facing move as shown in my video here:<BR /><BR />https://www.youtube.com/watch?v=Zxp-k4pQKTU<BR /><BR />The threading is done with a hand coded G76 Mach3 routine. Wed, 18 Nov 2015 03:53:35 GMT chrisjh777 2015-11-18T03:53:35Z