Y-axis Vibration Issues.

Discussion in 'Calibration, Help, and Troubleshooting' started by Syko_Symatic, Jan 8, 2017.

  1. Syko_Symatic

    Syko_Symatic Well-Known Member

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    Evening All,

    So I have been have vibration issues on the Y-axis for a while. I have changed the motor, bearings, motor mount for the x-axis but no luck. I have done the axis commissioning about 5 billion times now but this happens every time. Can anyone help? I have attached a video. As you can see it doesn't happen all the time, it only seems to be at certain speeds (that it's audible at least).
     
  2. Syko_Symatic

    Syko_Symatic Well-Known Member

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    Any tips for how to make sure things are all straight and parallel welcome!
     
  3. Spoon Unit

    Spoon Unit Well-Known Member

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    The fact that it's not happening all the time is curious. It almost points to a slicing issue rather than anything else. Could it be a stepper driver voltage issue, or stepper driver issue?
     
  4. Kanedias

    Kanedias Well-Known Member

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    On the Advanced Tab in S3D do you have 'Allow gap fill when necessary' enabled?
     
  5. Syko_Symatic

    Syko_Symatic Well-Known Member

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    I do have a spare driver so I could try that. I have the voltage set to 0.58 and have tweaked it both ways but no luck. Yes I do have 'Allow gap fill' enabled? Is that an issue?
     
  6. Spoon Unit

    Spoon Unit Well-Known Member

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    Could you write a few simple gcode commands into a file, just to move the carriage in the X and Y axes at various Y and at various speeds to try to create a repeatable problem? This might help focus in on the specifics of the problem.
     
  7. Syko_Symatic

    Syko_Symatic Well-Known Member

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    I think I can, let me get my CNC head on and I will get on it!

    OK, code is done. Going up to a max F2000 in X and Y. Checked it in S3d and it seems spot on. Could someone cast a quick eye to make sure I have not forgotten anything!?
     

    Attached Files:

    #7 Syko_Symatic, Jan 9, 2017
    Last edited: Jan 9, 2017
  8. Syko_Symatic

    Syko_Symatic Well-Known Member

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    ^^ Code is done.
     
  9. Jasons_BigBox

    Jasons_BigBox Well-Known Member

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    It's a bit hard to confirm from the video but I had an issue with a buzzy vibration type sound on my y-axis. one thing I found was that the y shaft pulley was rubbing on the motor mount (the red/orange part on your video). Not the belt pulley on the motor, the one on the shaft that runs across the back of the machine.
    I moved it's position a little and applied a small amount of grease to the face that was rubbing and it seemed to improve the situation.

    Even with a damper fitted, my y-axis is still more noisy than the x or z axes. I assume it's using the backplate as a sound board.
     
  10. Spoon Unit

    Spoon Unit Well-Known Member

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    Yeh, that's what I had in mind. Just motoring around to check everything seems fine. Did that run smooth?
     
  11. Spoon Unit

    Spoon Unit Well-Known Member

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    Yeh - I think that's the situation. I think I re-printed the motor holder with one that Alex designed to try to hold the motor a touch further away from the edges. I don't think it made a lot of difference to my setup as I already had the damper installed. The damper did mike quite a difference but didn't silence it. I think alternate drivers or a different driver board can help (those fitting the Duet suggest it's near silent - making that fans the noisiest thing).
     
  12. Syko_Symatic

    Syko_Symatic Well-Known Member

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    Just a thought on the commission process. You should tighten the x rods and the belt before you do the y ones? Does this not stop the x axis rods "self centering" using as the carriage is slid along the y? As with the dual design with titans the rods can move fairly freely so it seems a little counter productive to tighten them before aligning the y?

    Just playing on my mind while I wait to go home.
     
  13. Syko_Symatic

    Syko_Symatic Well-Known Member

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    I thought that but you would've thought you could absorb the vibration by holding the back panel but it doesn't change a bit.

    I will conquer this!
     
  14. Syko_Symatic

    Syko_Symatic Well-Known Member

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    When I get home I will run it and we will see!
     
  15. Kanedias

    Kanedias Well-Known Member

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    Just thinking that it looks like the jitteriness you get when there is only just enough of a gap for it to attempt to do infill.
     
  16. Syko_Symatic

    Syko_Symatic Well-Known Member

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    Ladies and gentleman the winner is..... (Drum roll please)...... Replacement stepper driver! Pretty much all of the vibration has vanished. Thanks all for your help and suggestions.

    Running the bit of gcode resulted in vibrations around the 1000 to 1200 speed. So I rechecked everything replaced the stepper driver and boom! Job done!
     
    Spoon Unit likes this.

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