STEPPER AND HOMING PROBLEMS
-
@Phaedrux If tat's the case, can you replace individual drivers? How do you test drivers?
-
@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?
-
@swrightlast said in STEPPER AND HOMING PROBLEMS:
@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.
-
any way to directly test the driver? if the driver's fried, does that mean a new board (choke, choke) ?
-
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.
-
@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.
-
@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?
-
@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?
-
@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.
-
I'd probably start with re-crimping the ends.
-
@Phaedrux , Recrimped....no change (sigh).
-
@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?
-
@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.
-
I checked motor movement.....I get a short grunt of ratcheting noise, and NO movement on either axis.
-
If you disconnect the belts from the pulleys do the motors spin individually using this sent from the console:
G91 G1 S2 X10 F3000 G1 S2 Y10 F3000 -
@swrightlast said in STEPPER AND HOMING PROBLEMS:
.I get a short grunt of ratcheting noise, and NO movement on either axis.
Do you still get any errors in the console?
-
@swrightlast said in STEPPER AND HOMING PROBLEMS:
needed to clip the wires at the board connector to enable feeding the wiring.
When you recrimped, did you get the wire phases in the same order?
-
@Phaedrux said in STEPPER AND HOMING PROBLEMS:
Duex2 expansion board
n
G1 S2 X10 F3000
G1 S2 Y10 F3000Again, just a short grunt of ratcheting noise, Motor shaft appears to be alternating rapidly between forward and backward movement.
Also got motor phase error thing.
-
Well the behaviour of the motor and the error message would seem to indicate there is a mismatched phase in the motor wiring.
Do you have the make and model of the motor to get the phase information?
You can also use this technique to find the phase pairs.
https://duet3d.dozuki.com/Wiki/Choosing_and_connecting_stepper_motors#Section_Identifying_the_stepper_motor_phases -
@Phaedrux , standard folgertech nema 17, 1.8 degree. 5kg/cm, 1.5a. checking phase now......stay tuned.
