I found a solution to my wandering spindle speed. I ended up changing out the spindle motor cable to three wires inside metal/vinyl conduit. That didn't help. Then I started replacing CAT5 control lines with shielded cable. No good. Finally, I changed, what now seems the most obvious thing, the analog output from the serial DAC to the VFD, with a shielded pair. Bingo. It makes sense because this is the highest impedance link in the chain. I am happy again.
Now to get the limit and home switches installed and working. I still have not gotten any opinions about how to configure a home switch with steppers. Do I even need one? If so, should I have an index sensor on the ballscrew to get a reliable home signal within a quarter step? Then on to the Summit tool changer. This is looking pretty easy. There is a wire for each function; tool in, tool out, tool slot forward, tool slot reverse, tool slot home, and function done. A little off topic, I noticed on the X ballscrew lazy end bearing mount, I can see the balls within the bearing. There seems to be no provision for a seal. Has anyone else seen this practice? -- 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
