TOS-KURIM CNC Upgrade

[JimJam]

Starting to get somewhere with wiring it all up now, just a quick query before I do something stupid...

so the wiring instructions for the main plug from the drive to AXBB board are:

The pinout of the Main connector is listed below:

1) Step signal input
2) Direction signal input
3) Ground for Step and Direction signals (NOT for power)
4) 5V power input. (if this input is fed then the 7.pin should not be connected!)
5) Reset (input) and Stop input)
6) Error (output) and Stop input
7) DC power + (12V DC input for digital processor)
8) DC power – (ground for the 12V DC power supply)

Step 3 says NOT for power, but the wiring diagram shows it connected to the 0V of the 5VDC power supply...

[Muzzer]

I think all it means is that you shouldn't connect the power supply 0V to it as the main connection to the board - that needs to go in to 8). The tracks from 3) to the rest of the circuits are probably very thin and come via the processor. May get damaged if you try to run the power supply connection in through them. But when you run the step/dir signals to the stepper / servo drive, you should take the associated 0V from 3) to give you the three wires you need. Better noise immunity.

The digital / logic circuits on the board are powered from the 5V either directly from 4) or by an internal step-down regulator fed from 7). Which ever you choose, the associated 0V to the power supply should connect to 8), not 3).

Hope that make sense....