On Thu, 2009-04-02 at 13:20 +0100, John Stevenson wrote: > New beginner here just getting my head round the capabilities of EMC2 > and would like to ask a few question on the operation. > > Just taking the limit switches on one axis, say X for arguments sake, > we have two switched wired in series, done this way so as to only use > 3 inputs per machine. > If the table is traveling towards X+ switch and hits it - what ?
EMC2 will stop all movement and indicate an axis limit error. http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Homing_And_Limit_Switch > [a] What does the screen / command line say.? I don't recall off hand, I am not at an EMC2 machine right now, but I can check. > [b] Will it deny you the opportunity to jog further onto the limit > switch ? There is a check box in AXIS that can over-ride the limit error in order to get the axis off of the switch. > John S. > Regards, > > John Stevenson > L Stevenson [ Engineers ] I personally, would try to install the inputs needed for a full complement of limit and home switches. You can use cheap PCI dual parallel port cards: http://www.newegg.com/Product/Product.aspx?Item=N82E16815166007 (for other applications, one caveat is this card may not be compatible with Pluto cards) that will give you more than enough I/O. In my opinion, this will make the machine much easier to use. Also consider using two "switches" for the homes, one on the slide and another on the screw (or configure as index on encoder setups). This will allow a much more accurate home, so that you can conveniently reuse setups between power downs. If you could post a description and pictures of your setup, this would help draw more opinions (if that is what you want ;). ---------------- Kirk http://www.wallacecompany.com/machine_shop/ ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
