On Saturday 12 September 2020 00:16:06 David Berndt wrote: > I've recently started playing more with a 4th axis and have Fusion > spitting out some reasonably decent G93'd code. > > Two things have come up now that I'm running a part or two. > > 1) Am I correct in assuming that the G64 P/q settings have limited/no > effect when using the a rotary axis and linear simultaneously? I can't > see a different in speed when I play with reasonable values for P. > > 2) Is there a minimum value for G93 feed rates. It would have been > convenient at one point today to plunge an endmill into a continuously > rotating A axis with something like G93 A45000 Z-1 F.2. Which I'd > expect to create an inverse time of 1/.2 = 5 minutes to plunge the > endmill 1" over (45000/360)=125 rotations @ 25rpm. A shallow cut in a > narrow slot with a smallish endmill. But the feed rate that I got was > much higher than expected, nothing below an F of .5 really seems to > give me an output that I'd expect. Am I missing something? Is there a > minimum/maximum value for F in G93? > > Thanks > -Dave
If there is, it is not mentioned in the latest docs. See g93-g94-g95, section 5.3.58. page 339 in my just built copy. Can your rotary do 25 rpm? Thats a quite high slew rate for a worm driven rotary. Timming belt driven should do that ok. Does it have a home switch? With a home switch you can directly measure the A SCALE to several digits to the right of the decimal with some temporarily active hal stuff... Do you have a minimum Z speed set such that your 1" in 5 minutes would be under? I hit something similar once when EDMing a broken tap out of a hole without damaging the hole. Sorry, but it seems the best I can do is ask questions. > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
