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  1. 14th October 2013, 05:51 PM #1
    ben_marrett
    ben_marrett is offline Novice
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    Default CNC Machine Problems

    Hi All,

    New to this part of the forum. Have almost finished building my 2.4mx1.2 metre rig but having some troubles. Using Nema23 380oz 3.5A with the G540.

    Im running ballscrews on all axis (x,y,z) with one on each side of the x axis. They are Chinese/Malaysian ones from linearmotionbearings(ebay).

    Im not having any troubles when running them forward but in reverse they seem to keep "binding" up.

    Ive tried tightening the nuts on the end of the ballscrew but still experiencing the same issue. When i run the machine super slow it doesn't happen but still isn't very smooth. Not sure if greasing it all up well will help (also what grease should i be using)

    Thanks All,

    Ben
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  3. 15th October 2013, 07:36 PM #2
    Smirkin
    Smirkin is offline Member
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    Default

    Hi Ben

    how are you driving the X axis? Are you using one stepper to drive both ball screws? If you disconnect the stepper motor and the gantry from the X axis ball nuts, are you able to turn each ball screw without any binding in both directions? Could it be the ball screws are misaligned to each other?

    Craig
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  4. 16th October 2013, 01:31 AM #3
    laurent_parti
    laurent_parti is offline Novice
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    Default

    Hi Ben,

    Check also the wiring connector on the stepper and the driver. I had the following concern with one axis on my machine. It was running quiet good in one direction and strugle in the other. I spent a lot of time to discover this junky connection one one single wire .
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