Troubleshooting non responsive machine- Mach3/Syil x4

[Doddy]

I’m not sure if this is anything but yes the estop is wired directly to the bob - however
There are 2 wires that run from the bob to estop -half way along they are inserted into a ‘plug’ then continue onto the estop.
The plug is male and there is its female companion vacant nearby on another board - is this a coincidence or should it be plugged in?



So white and red go to bob and the red and blue go to estop button


Sent from my iPhone using Tapatalk

This worries me a bit. I would NOT plug the connector into the board - from the schematic and the legends on the board I do think that the board terminal is carrying 24VAC for the E-Stop relay, plugging it in could throw 24VAC into the BOB input channels. You've already established that power is present on the BOB which means that the schematic and the E-Stop isolation of the BOB isn't effective (wired).