On Wed, 2008-05-07 at 10:57 -0500, Jon Elson wrote: > Mark Wendt (Contractor) wrote: > > > > Thanks for the info. I was doing a little reading on the > > wiki and in the user doc over the weekend, and missed seeing anything > > on that. Is there any documentation that I may have glossed over? > It likely is NOT documented at the present. I think someone is > working on a standard configs file set for this machine config. > We have batted this around a bit, I have a fairly clear idea how > I would do it if I were building such a machine, but I haven't > actually done it. I think all the HAL components you would need > already exist. Most likely, just one AND gate for each motor, > that passes the step pulses until that motor's home switch > trips. Then one and gate to send EMC the home switch signal > ONLY when both home switches are tripped. That signal also sets > a flip-flop to pass all further step pulses by bypassing the and > gates, using a 2-1 multiplexer. > > Jon
I wonder. If you don't know the state of the two end carriages, and they might be in a binding condition, it might be necessary to sync the carriages before any substantial move. Could a laser be used to get the carriages synced enough to for a move to a proper sync? -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC/EMC CNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending Craftsman AA 109 restoration Shizuoka ST-N/EMC CNC) ------------------------------------------------------------------------- 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
