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SmoothStepper USB / Re: smooth stepper and modbus I/O
« on: May 16, 2012, 06:56:00 PM »
I am not relying on Mach at all for limits or E-Stop. Limits are handled by the PLC internally and E-Stop is handled in the PLC but also via the second pole of the E-Stop switch cutting the power to the contactors which in turn cuts the power to my drives etc. The only thing Mach is doing is getting a signal and throwing an E-Stop for itself. If Mach didnt get my E-Stop signal then it may happily think it was carrying on machining but my servos would have been stopped by hardware and would not be doing anything that Mach was telling them to do.
Having said that Modbus has been totally reliable for me, I have never had a problem, most of my buttons on the control panels go via it, my lathes turret also goes via modbus, coolant on/off etc etc and not once have I seen a problem, possibly it is the hardware you are using that the problem lies with?
Hood
Having said that Modbus has been totally reliable for me, I have never had a problem, most of my buttons on the control panels go via it, my lathes turret also goes via modbus, coolant on/off etc etc and not once have I seen a problem, possibly it is the hardware you are using that the problem lies with?
Hood