Andy Pugh wrote: > On 3 April 2010 01:07, Frank Tkalcevic<fr...@franksworkshop.com.au> wrote: >> G33 sounds more complicated. Won't G33 have problems requiring the spindle >> turning under power, being "at-speed", and then synching with index pulse? >> > The spindle definitely does not need to be under power or at-speed. I > am not sure about the index pulse, but if it does then you only have > to turn it far enough to get an index then align the clock. > > I think G33.1 will wind back out (it is the tapping code) but I am not > sure it will reverse more than once. It's not hard to find out though. > I don't think so. The rigid tapping code expects the spindle to only go forward while it's tapping, and to only go backward when it's retracting the tap. The way spindle-synched motion works at the moment, motion goes forward as long as the spindle moves forward, motion stops if the spindle stops or reverses, and forward motion will continue when the spindle goes past its previous furthest excursion. So if you stop the spindle and turn it 1/4 turn backwards, there will be no axis motion until you have moved it past the point where you stopped it - 1/4 turn forward. If you wiggle it back and forth, without ever passing that mark, there will be no axis motion.
This is as I understand it, but I could be wrong. - Steve ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
