SOLVED Y-Axis "clunk"

Discussion in 'Calibration, Help, and Troubleshooting' started by Syko_Symatic, Jun 12, 2016.

  1. Syko_Symatic

    Syko_Symatic Well-Known Member

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    I keep suffering with a "clunk" noise in the Y-Axis. I follow the commissioning process and everything is nice and smooth. When I tighten it all up the X motor side rod makes a big clunk noise when I reach around the middle of the bed while printing. I have done the process several times and always get the same result.

    The bars appear to be straight and as I said everything moves great until tightening and putting the Y axis motor in position. Could it possibly be the Astrosyn dampener? I know that I level the Y motor as I tighten it onto the frame and it gets pulled down/up as it runs.

    Just wondering if anyone has had a similar experience.
     
  2. mike01hu

    mike01hu Well-Known Member

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    It will not be the damper. With the motors turned off, does the clunk happen when you push the carriage through that point? Also, check that nothing is hitting the side frame as it does run quite close to it. I had a similar problem that turned out to be the bush but I cleaned and re-lubricated the shaft and the effect got less and after a few hours of printing it has disappeared.
     
  3. Syko_Symatic

    Syko_Symatic Well-Known Member

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    I tried again tonight. Looks like I may be heading for a strip down of the top of the machine. It appears fine, no lumps and bumps, then I tighten all the cap heads and the clunk appears again.

    Quick strip down and clean up tomorrow evening and see what I can find!
     
  4. Steven Burns

    Steven Burns Well-Known Member

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    If you do figure this out, please share. I have the same issue on mine. If I move the Y back and forth it seems like it is clicking on something. I have looked everywhere for the sound and cannot seem to locate it at all, just like you.

    I am planning on upgrading to the Pro Titan Hybrid over the next few days and will probably just tear out the whole X/Y carriage and start over again. I already have an astrosyn damper in place on the Y so at least I am a little ahead.
     
  5. Syko_Symatic

    Syko_Symatic Well-Known Member

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    Will do. I'm going to do the same thing. Take the X/Y carriage out, maybe pack the bearings/change some bearings, clean everything up and put it all back again. Should be fun!
     
  6. Stian Indal Haugseth

    Stian Indal Haugseth Well-Known Member

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    I had problems the whole box being too narrow in front. So before I commisoned everything I had a lot of "lumps" moving Y back and forwards. I realized I had two things. First the rods were too tight in the X motor mount and the X motor idler. I could not even move, twist the shaft by hand. After disassembly I drilled out the shaft holes (carefully). Now the shafts could slide in and out. When now pushed the carriage back and forwards I got some clunks as the shafts where slipping. This disappeared when I tightened the shaft clamps on X motor mount and idler. To get around the box being narrower in front I tightened them at the back. Should probably loosen every bolt on the box to straighten it instead.
     
  7. R Design

    R Design Well-Known Member

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    One of the bearings?
     
  8. Chase.Wichert

    Chase.Wichert Well-Known Member

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    The problem is the motor mount or motor idler carriages. One of the x-axis rods is slipping in the their clamps. And it will thunk every time it slips, mine was the right rear clamp the one closest to the y-axis motor. I tightened the bejeezus out of it, and it stopped.

    Edit:
    They didn't leave enough of a gap to allow for tight enough clamping. In the dual titan design I have widened the gap for this very reason, so you should be able to tighten it enough to keep the clunk from happening.
     
    #8 Chase.Wichert, Jun 13, 2016
    Last edited: Jun 13, 2016
  9. Steven Burns

    Steven Burns Well-Known Member

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    I will give this a try when I get home tonight. I hated the idea of having to take the entire carriage out if it was a simple fix.

    Thanks again and I'll let you know if this fixes it.
     
  10. Chase.Wichert

    Chase.Wichert Well-Known Member

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    if you get your ear close you should be able to tell if it is one of the rods.
     
  11. Steven Burns

    Steven Burns Well-Known Member

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    Chase, You're a mad genius. Quite a few of the screws were loose (some of my own as well, but that is a completely different story). Once I tightened them all up the sound went away.

    Thanks!!
     
  12. Stian Indal Haugseth

    Stian Indal Haugseth Well-Known Member

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    I tried saying the same but probably wrote to much :p
     
  13. Chase.Wichert

    Chase.Wichert Well-Known Member

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    That you did, lol
     
  14. Syko_Symatic

    Syko_Symatic Well-Known Member

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    I took out the entire X/Y axis assembly replaced one of the bearings that might have been the problem. It was all nice and quiet for a few prints but now the clunk is back! I am assuming it must be a bolt "relaxing" and the assembly moving slightly. It is still better than before but annoying none the less.
     

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