Hi Gary The limits are at the end of travel. As are the home switches. On most commercial machines like this there are 2-3 or 4 switches on each end of travel. What we do is home to the switches at one end and then offset to the center of the table. This offset is set in the ini file as a distance from the actual switch and index pulse to where the integrator wants home to be. It is seen by everything in the control as the real home. So even if you command a g53 x0y0z0 it will find the center of the table rather than the switches.
HTH Rayh On Sun, 2008-05-11 at 03:12 -0700, Gary Fixler wrote: > On Sat, May 10, 2008 at 7:53 AM, Dave Engvall <[EMAIL PROTECTED]> > wrote: > > > The Mazak at Galesburg offsets (X and Y) to middle of table. > > I thought limit switches needed to be at extents, because you can't > run right through them. How do they have it set up? It would work with > an optical trip - something I've kind of wanted to set up with > something like this: > > http://www.robotobjects.com/scripts/prodView.asp?idproduct=407 > > > I've seen used Boeing machines with a 1" aluminum plate > drilled and > tapped in a 2" or 50 mm grid. > Lots of flexibility for mounting. > > I recently made a tiny one of these for my mini mill, and confirm that > they're awesome: > > http://www.flickr.com/photos/garyfixler/sets/72157604574121304/ > > They're pretty easy to code for with nested O-code while loops, and > either a drilling, or helical boring routine. I used the latter, with > my own helical sub, which I later learned is nearly identical to the > one included in EMC's examples files :) > > > For 90% of what I do I use UL of my vise as G59.3 and clamp > fixtures > in the vise. I simply draw my parts with a 0,0 UL corner. > > I like this idea, especially as it's easy to square the mill back up > with my table. How do you account for the horizontal position in the > vise? Do your fixtures butt up against one side of it for > repeatability across the jaws? I think I'm going to steal this > concept. > > > I keep thinking about making a tool length gage mounted on the > table > with a piston and a prox switch. It should be a very fast and > accurate way of setting length. So far the round-to-it has > eluded me. > > I think this doesn't even have to be mounted. It could simply be a > little device you place on the table whenever needed, though it > wouldn't be quite as fast as a prox switch. I just found this while > poking around the net: > > http://www.industrialhobbies.com/howto/production_notes/height_gauge/height_gauge_pt1.htm > > I'll just need a parallel block, a height gauge, a little block for > the gauge tip, and some epoxy. > > > -g > > ------------------------------------------------------------------------- > This SF.net email is sponsored by the 2008 JavaOne(SM) Conference > Don't miss this year's exciting event. There's still time to save $100. > Use priority code J8TL2D2. > http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone > _______________________________________________ Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
