Yes,that is exactly what I am doing -- limit switches in both directions of X and Y axis are common. With a bit of work I could re-wire the limit switches to provide *four *signals: X+,X-,Y+,Y-. I suppose what I am asking for is a sort of "software" implementation of the same idea. This seems to be how KCam works and I found it very convenient.
On Thu, Apr 23, 2009 at 7:59 PM, John Kasunich <jmkasun...@fastmail.fm>wrote: > robert melville wrote: > > I have just started to use EMC2 with a homemade > > tabletop mill and like it a lot. However, here > > is some behavior I have seen in another controller which I > > find very convenient.Is there some way to get EMC2 to do > > this also? > > > > Suppose I am running my XY-table in the positive > > X direction and I hit the X axis limit switch. I would like EMC2 > > to remember that I hit the limit while slewing positive in X and > > *only* disable further travel in the positive X direction. > Movement/jogging > > in negative X would be allowed so that I could jog the > > table off of the limit. > > > > Am I missing something here? > > Internally, EMC's motion controller has separate inputs for + and - > limit switches. If the + limit input is activated, EMC won't permit > further motion in the + direction, and the same for the - input. > > If you have separate + and - limit switches, wired through separate > physical input pins and to the motion controller's inputs, then EMC will > do what you want. > > If you are running both inputs in through the same parport (or other I/O > device) pin, then you have to connect both of the motion controller's > inputs to the same pin, and both will be activated when you are on > either limit. In that case, you need to click on the "override limits" > button on the GUI. > > Regards, > > John Kasunich > > > > ------------------------------------------------------------------------------ > Crystal Reports - New Free Runtime and 30 Day Trial > Check out the new simplified licensign option that enables unlimited > royalty-free distribution of the report engine for externally facing > server and web deployment. > http://p.sf.net/sfu/businessobjects > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensign option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
