I think that I've got the control cabinet wiring sorted out. I'm using a Schmersal safety relay which can be triggered by the main E-Stop button, the stepper driver fault output, the inverter fault output and the E-Stop button on the MPG hand controller that I've got. Once triggered the signal is sent to the CSMIO controller, the stepper drivers are disabled and the inverter stops the spindle using the E-Stop ramp. A off time delay relay is used to allow the inverter to stop the spindle and then enable the STO function which disables the output of the inverter. To reset the stepper drivers I've included a switch in the PSU contactor coil circuit. A switch is used to also enable the inverter STO function when changing spindle bits to make sure there is no chance of the spindle starting. I intend to mount the control cabinet on the machine frame using some Paulstra anti vibration mounts. Also on the machine I will include a small control panel, with start, stop, pause, home and auto tool measurement buttons, along with green, red and yellow LED's for the start,stop and pause buttons.




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