Feature Requests item #3397759, was opened at 2011-08-25 09:46 Message generated for change (Tracker Item Submitted) made by grandixximo You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=356744&aid=3397759&group_id=6744
Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: EMC2 G-code Interpreter Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: grandixximo (grandixximo) Assigned to: Nobody/Anonymous (nobody) Summary: feed rate optimization for curved path sections Initial Comment: EMC2 for what i have seen, when you load a programmed path with G42 it displays the G42 path and it's regulating the speed according to the G42 path. Now let's say we are doing the program in the attached picture at feed 1000, on linear paths the programmed path and the G42 path do not differ so you have same speed on both path, but on curved path like the radius 50 the paths are different, for the G42 path the travel length is 47.1mm (30*6.28/4) for the programmed path the travel is 78.5mm (50*6.28/4), this means that when you keep a constant feed of 1000 on the G42 path, the speed on the programmed path (peripheral path) is 1.666 times faster (78.5/47.1) so you are actually going at feed 1666 (1000*1.666) because you are moving and keeping constant speed on the small radius but actually cutting on the big one. Now in my example the ratio is just 1.666, but think about a radius 82 done with a 160 diameter tool, the ratio is huge the speed difference will be huge and the job will not be done properly. EMC2 need to be able to keep a constant speed on peripheral path, otherwise the whole G42 G41 path calculation seems useless to me... ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=356744&aid=3397759&group_id=6744 ------------------------------------------------------------------------------ EMC VNX: the world's simplest storage, starting under $10K The only unified storage solution that offers unified management Up to 160% more powerful than alternatives and 25% more efficient. Guaranteed. http://p.sf.net/sfu/emc-vnx-dev2dev _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
