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  1. #11
    How is the cable connected at the motor end? Is there a connector? Or are the wires soldered? Does the motor have 4 or 8 wires? If you disconnect it you can check the impedance of each winding with a multimeter on ohm reading and see if you get same values on each pair. Then connect with another cable or 2 cables with 2 wires, anything you may have around.

  2. #12
    By the looks of it at the rear of the motor there is a black block connected to it which has a single black sheathed cable going through the panelling and straight down to the controller unit.

    The wire has 4 strands, black, blue, green/yellow and brown. Black and brown are linked together in the controller, green/yellow and blue are on their own. I've attached a picture of the controller unit so you can see how they enter.

    Can I just take the connecter block off and check or does it need to be at the stepper end?

    Click image for larger version. 

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  3. #13
    Just as a heads up.

    Took the Y axis belts off.

    The Y axis free wheeled and had no resistance
    The shafts did not free wheel however they moved smoothly
    No movement in any of the bearings from what I could see

  4. #14
    Those are not the wires going to the motor but the signal wires going to the drives. The motor wires are connected to the black drives from your first post picture (A+; A-; B+; B-)

  5. #15
    So this is where I am at. Ive traced the wires back from the motor.....

    1 - Wire direct from Y axis motor, Green, Black, Red, Blue which go into White, Brown, Yellow, Green respectively

    Click image for larger version. 

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    2 - They then go into this relay RXM 24VDC which Im guessing switches between the Y and the 4th, plug in rotary axis.

    Click image for larger version. 

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    3 - The wires then exit and come into the controller

    Click image for larger version. 

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  6. #16
    Just in case anyone is interested...

    This is how a vector cut at 150mm/s looks like when its working correctly...

    Click image for larger version. 

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    Here is what I am getting at the moment, the speeds are marked in the corner...

    Click image for larger version. 

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  7. #17
    Could you bypass the relay and connect the motor cable directly to the drive? Blue wire to A+; red wire to A-; green wire to B+and black wire to B-

    edit: You can also check the resistance between blue and red and between green and black after you disconnect them.
    Last edited by paulus.v; 2 Weeks Ago at 05:31 PM.

  8. #18
    I guess so yeah, unscrew them from above and below the relay and connect them together. Then turn it on and see if we have the same issue?

  9. #19
    Insulated crocodile clips and extra wire is going on my Christmas list!

  10. #20
    Quote Originally Posted by SweetAs View Post
    I guess so yeah, unscrew them from above and below the relay and connect them together. Then turn it on and see if we have the same issue?
    Better if it is possible to unplug directly the black motor cable from first picture and connect them directly to the motor driver.

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