All- I'm starting in the process of converting a Sieg SC2518 CNC lathe to LinuxCNC control. I'll be using Mesa hardware, 5i23+7i33+7i37 and have had good experience with that in the past. Incomplete in-process documentation is here:
http://code.google.com/p/sector67-sandbox/wiki/SiegCNCLathe If anyone has done a conversion like this I'd certainly appreciate any advice. More specifically, I have two questions with respect to the encoder. The machine is built with a 100 ppr Automation Driect TRD-S100BD 12-24V open collector encoder plus a magnetic reed switch that triggers once per chuck revolution. The encoder has a Z pulse but as it is on a belt it will not fire once per chuck revolution, but some fraction of that. I plan on integrating the spindle control to be able to thread, but I am wondering if the Z pulse needs to be strictly once per chuck revolution or if I could instead use the Z pulse directly from the encoder, which would be a bit simpler. Further, I am wondering the best way to interface a 12-24V open collector encoder with the Mesa 7i33 servo control card. I presume I would set the jumpers for TTL mode, but then after doing so can I just connect the A/B or conversely not A/not B? I guess the question is are the encoder inputs in TTL mode on the Mesa 7i33 pulled up to positive voltage. Thanks in advance for the advice, Scott ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_nov _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
