> -----Original Message----- > From: Stephen Wille Padnos [mailto:spad...@sover.net] > Sent: Saturday, 3 April 2010 11:54 AM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Hobbing > > 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.
Nope, you are exactly right. On both accounts. Turning the spindle by hand will make Z move until it gets to the Z specified in G33/33.1 then stop. G33.1 will move back, but only when it is within the G33.1 bounds. I had a quick try at modifying my .hal file, and it worked, but I left a lot of other things in there that made the axis fault if I turned it too far. I should be able to get that working, which will be fine for what I'm trying to do. Thanks, Frank ------------------------------------------------------------------------------ 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
