I have been working on an implementation of the G71 roughing cycle for lathes. While the code is unfinished and known to be non-robust it's ready for initial review. A patch is available at:
http://www.bpuk.org/linuxcnc/g71-patch-1-initial-feedback-mod.diff with sample g-code programs at: http://www.bpuk.org/linuxcnc/test.ngc http://www.bpuk.org/linuxcnc/test2.ngc The main question I have is what 'should' happen after the G71 line is executed. Should the program continue on the next line, or skip the profile block (defined by N1.... Nx) ? To work around the use of U and W words on other controllers I have used J and L respectively. As such the complete list of words used by the current implementation of G71 is: P Block Number of contour beginning (uses N word in beginning block) Q Block number of contour end (uses N word in end block) D Roughing Depth per move R Retraction from each cut J Overthickness for finishing at X (diameter) (U on other controllers) L Overthickness for finishing at Z (W on other controllers) I Thickness for finishing at X K Thickness for finishing at Z F Feedrate override between P and Q blocks S Spindle speed override between P and Q blocks T Tool override between P and Q blocks There are a few screenshots at http://www.bpuk.org/linuxcnc/ at various stages of progress. OD and ID should work for G1/G2/G3/G4 profiles for front-tool lathes, I haven't looked at back-tool lathes at all yet. UW commands are invalid and ignored at this stage. Until I'm happy with the code I won't be looking at type 2 - as such only type 1 (no pockets) g-code is supported so far. Any comments are appreciated Ta Ben ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
