STEPPER AND HOMING PROBLEMS

swrightlast

@Veti Not trying to set up stealthchop, that's what showed up when I connected YAT this morning.

Phaedrux

Check the PSU voltage output with a multimeter.

swrightlast

Phaedrux

@swrightlast said in STEPPER AND HOMING PROBLEMS:

but did have to re-pin new connector for x axis. All wires are in the correct positions in the connectors, and are connected to the board correctly.

Something may have been dislodged or damaged during the operation?
Retrace your steps and recheck the wiring.

The description of the X and Y axis sounds like it could be a disconnected or intermittent phase connection on the steppers. Best to recheck the wiring first before doing any further live testing. Disconnecting a driver while it's powered is a good way to kill it.

deckingman

I would add that you can test each motor individually which will help to narrow down the problem. See here https://duet3d.dozuki.com/Wiki/ConfiguringRepRapFirmwareCoreXYPrinter and check out the Movement Section.

Veti

@swrightlast
whats the voltage reported in the dwc?

swrightlast

@Veti 24.6

swrightlast

@Phaedrux If tat's the case, can you replace individual drivers? How do you test drivers?

swrightlast

@Phaedrux

@Phaedrux said in STEPPER AND HOMING PROBLEMS:

Disconnecting a driver while it's powered is a good way to kill it.

kill it......the driver or the stepper?

Phaedrux

@swrightlast said in STEPPER AND HOMING PROBLEMS:

@Phaedrux

@Phaedrux said in STEPPER AND HOMING PROBLEMS:

Disconnecting a driver while it's powered is a good way to kill it.

kill it......the driver or the stepper?

The driver. But hopefully it hasn't come to that. Not exactly a user replaceable item for most.

swrightlast

any way to directly test the driver? if the driver's fried, does that mean a new board (choke, choke) ?

Phaedrux

Well given the low voltage warning it could just be a power wiring issue.

If it did happen to be a dead driver you have the option of remapping the axis to use an unused driver.

Or if you didn't have a spare driver you could add more drivers with a cheaper Duex2 expansion board.

But first let's check the wiring.

Phaedrux

@swrightlast said in STEPPER AND HOMING PROBLEMS:

any way to directly test the driver?

Yes, as deckingman posted above the link there has directions on issuing commands to test each individual motor separately. But before you try and move the motors again, check the wiring.

swrightlast

@Phaedrux . As stated earlier, I checked stepper motor wiring, and have continuity from motor to board on all 4 wires (connector to connector). Anything wire wise to check?

Phaedrux

@swrightlast said in STEPPER AND HOMING PROBLEMS:

but did have to re-pin new connector for x axis

What exactly does this mean? What did you re-pin? How did you do it? Why?

swrightlast

@Phaedrux , Had to put new connector on stepper wires (crimp on new pins), at the board end. Have continuity from motor end to board end at the connectors. I made no changes in config.g or the homex,y,z.g. It worked fine before wiring, so, to me it would indicate a wiring problem. I'm just at a loss as to what to check next.

Phaedrux

I'd probably start with re-crimping the ends.

swrightlast

@Phaedrux , Recrimped....no change (sigh).

deckingman

@swrightlast Have you tested each individual motor as I suggested? If so, have you tracked it down to either the X (alpha) motor or the Y (beta) motor or both? If one motor works fine and one does not, then you could try swapping the motors. If the problem moves with the motor, then it;s the motor. If the problem persists, then it could be the driver.

Out of curiosity, what were the changes you made which led to you having to fit a new connector?

swrightlast

@deckingman , I'll check that again. Answer to your other question: I was enclosing motor wires within the 2020 extrusion, and needed to clip the wires at the board connector to enable feeding the wiring.