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Y Axis ( Motor Spinning Around Threaded Rod)

Discussion in 'CNC Mills/Routers' started by Joshua Zanon, Dec 21, 2020.

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  1. Joshua Zanon

    Joshua Zanon New
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    I had a problem with my Y-Axis and was wondering if anyone has encounter the same issue.

    I bought my machine used so I unfortunately didn't get the opportunity to build it. While cutting the other day, the machines Y Axis started dragging on the one side. After looking into why this was happening, It seems like where the threaded rod and motor come together is not properly connected. I tried tightening it but that didn't seem to do anything. If I try to jog the machine around the motor and rod move but the Y axis itself only moves on the one side that is properly connected.

    How should I go about resolving this issues, has anyone encountered this themselves before and would you have an idea as to why this would have happened?

    Machine: Open Builds Leads 1010
    Router: Dewalt 611
     
    #1 Joshua Zanon, Dec 21, 2020
  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Replace broken shaft coupler: 1/4" x 8mm Flexible Coupling
    Add some loctite to the Grubscrews so they don't vibrate loose (old coupler either broke, or lost its grubscrews when they vibrated out without loctite)
     
    #2 Peter Van Der Walt, Dec 21, 2020
  3. Joshua Zanon

    Joshua Zanon New
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    Thanks for your response Peter! I think the Grubscrews are still in the shaft coupler as I did try tightening them down... But that didn't seem to remedy the situation. The Shaft Coupler looked to be intact but I could be missing something.
     
    #3 Joshua Zanon, Dec 21, 2020
  4. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    #4 Peter Van Der Walt, Dec 21, 2020
  5. Joshua Zanon

    Joshua Zanon New
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    Yeah, I may have to take that apart and see what is going on, I do not recognize those parts for the second suggestion.
     
    #5 Joshua Zanon, Dec 21, 2020
  6. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Behind the plates, attached to the leadscrews, so yes, take it apart so you can see.
     
    #6 Peter Van Der Walt, Dec 21, 2020
  7. Coleman Martin

    Coleman Martin New
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    I'm having trouble with the flexible couplings letting loose of the lead screws on my C extrusion lead machine Y axis. Here is the coupling for reference. 5mm * 8mm Flexible Coupling Twice when I hit an obstruction while jogging the Y instead of skipping steps the set screws on the lead screws slipped. This caused me to need to back out the set screw and reset this screw. I'm, afraid if I do this again, I'll strip the tiny set screw.. Beyond the obvious (don't hit an obstruction) what can I do to make this more robust? Should I file a flat spot on the lead screw so the set screw can bite properly? Also is locktite used on this screw?
     
    #7 Coleman Martin, Feb 7, 2021
  8. Alex Chambers

    Alex Chambers Master
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    Yes - use (non-permanent) loctite. Some people file a flat on the leadscrew and if that all fails you can drill and tap the coupler for 4 mm.
    Alex.
     
    #8 Alex Chambers, Feb 7, 2021
    Peter Van Der Walt likes this.

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