Topics created by buurman

@buurman how many wires does it have? If it's just 2 then the critical thing is to get + (normally red) and - (normally black) the right way round. If they are the wrong way round then you may damage the fan mosfet on the Duet.

@buurman said in sanity check: do I need to change stepper motor phase wiring?:

@joergs5 Yeah i was gonna crimp and put new connectors anyways since the current ones only kinda fit. I know that you can reverse the motor direction by flipping the connectors on one phase. However, here the middle two wires are reversed, so from one from phase 1 and from from phase 2, also this is on only some of the stepper connectors, any idea what that could be for?

If the stepper motors have 6-pin JST connectors on them (of which only pins 1 3 4 6 are used) then there are two common wiring schemes for such connectors. One of them requires the two middle wires to be crossed at one end of the cable.

I suggest you verify for each motor+cable that the two pins at one end of the 4-pin connector that you will plug into the Duet are one phase, and the two pins at the other end of the 4-pin connector are the other phase. See https://docs.duet3d.com/en/User_manual/Connecting_hardware/Motors_connecting#identifying-the-stepper-motor-phases. Otherwise you may damage the stepper driver chips.

@buurman

There is a video out there showing that microswitches are actually very, very good when it comes to repeatability.

They are simple, safe and if you don't use the plain kind (not circuit board) they only need 2 wires. If you go the route be sure to the the COM and NC connections.

The kind with the circuit board have a couple of advantages (usually). They provide an LED to verify state. The signal is actively pulled-down or pulled-up so the signal wire to the Duet is never dealing with an open circuit which can act like an antenna pickup up noise.

There may be kinds a circuit board that don't behave that way but all the ones I have used do.

Frederick