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Having a problem with the Y-Axis

Discussion in 'CNC Mills/Routers' started by Kayla Hillman, May 31, 2020.

  1. Kayla Hillman

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    Hello everyone, I am new to CNC and still trying to figure things out. I have a Workbee 1510 and everything was running smoothly until the last few days. I've attached a video to show the issue, the Y-axis seems to be getting stuck. I think it's either the stepper motors or the belts that are the problem. Any insights would be greatly appreciated!

    Kayla.
     

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  2. David the swarfer

    David the swarfer OpenBuilds Team
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    I would first clean and adjust all the v wheels, some of them are not touching during some of those moves.

    Then I would check belt tension, I use a fishing spring balance to pull to a known value so that I know have them all the same.
    I find 12kg of pull to be enough on my 1 meter Y.

    Make sure that both motors are getting warm during use. If one (or the driver) is faulty it will stay cold.
     
  3. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Havent watched the video, but often times, also check that pulley is still tight on motor shaft, setscrews can vibrate loose
     
  4. Kayla Hillman

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    Hi guys, thank you so much for your input! Some of your suggestions lead us to the real culprit. We ended up taking the y-axis off to check the motors and one of them isn't turning properly. As seen in the newest video, it's jumping and not making a full rotation.

    A second question, do you know if there's a kit to convert this machine to ballscrew instead of belt driven? While I have this machine apart I might as well change it!

    Thank you for all your help - Kayla
     

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  5. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Watched the latest video and that looks typical of a motor where
    a) only 3 of the 4 wires are making good contact
    b) wire order is wrong
    c) stepper driver current is set much too low

    To test: Switch the two Y motor plugs, does it start working (then the stepper driver might be the cause - if the problem jumps to the other motor)
    If it still does the same even when moved to another driver, then check wiring
     

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