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Thread: Possible x motor issue.

  1. #1
    Join Date
    Feb 2013
    Location
    Healdsburg CA
    Posts
    22

    Default Possible x motor issue.

    Trying to figure out how to get rid of a rattle on one side of my ganty. See videos below. Any help is appreciated.

    https://youtu.be/5CF7DEGoFk0

    https://youtu.be/QrHRfNEwyxQ

  2. #2
    Join Date
    Sep 2006
    Location
    Garland Tx
    Posts
    2,294

    Default

    Sure sounds like the pinion is loose on the motor shaft!

    When checking the “grub” or set screws, remove it completely first to see if there’s another onr below it…

    SG

  3. #3
    Join Date
    Feb 2013
    Location
    Healdsburg CA
    Posts
    22

    Default I think you're on the right track

    Hi Steve.

    Thanks. I just reinstalled the motor a second time. This time I moved it side to side a bit before reattaching it to make sure it was properly seated in the rack and it seems much tighter (still a little bit looser than the other side but not much). Makes me think perhaps I didn't just need to lift it. I needed to "seat" it also. The other thing I noticed is the gear itself felt a tiny bit loose on the shaft. Is it possibly this set screw that I should tighten? I might try removing it one more time and tightening that set screw also.

    Thanks again for your help.

    Mike


    a
    Quote Originally Posted by steve_g View Post
    Sure sounds like the pinion is loose on the motor shaft!

    When checking the “grub” or set screws, remove it completely first to see if there’s another onr below it…

    SG

  4. #4
    Join Date
    Sep 2006
    Location
    Garland Tx
    Posts
    2,294

    Default

    The gear or “pinion” on the motor shaft should be absolutely tight! The set or “grub” screws were often installed two deep with the top one locking the bottom one. If you only re tighten the top one, you haven’t tightened the one that’s loose… if this is a stacked grub screw arrangement.

    SG

  5. #5
    Join Date
    Dec 2000
    Location
    Thorp, WI
    Posts
    2,742

    Default

    If you confirm that the pinion is tight, check the amount of backlash in that gearbox and compare it to the others. You can do this with a dial indicator on the X rail touching off on the gantry end plate or with a lever of sorts (large vise grip) clamped to the gear when the motor is off the machine.

    "He who would trade liberty for some temporary security, deserves neither liberty nor security" - Benjamin Franklin
    "Make yourself sheep and the wolves will eat you" - Benjamin Franklin




  6. #6
    Join Date
    Apr 2007
    Location
    Marquette, MI
    Posts
    3,381

    Default

    This may help
    Attached Files Attached Files
    Gary Campbell
    GCnC Control
    GCnC411(at)gmail(dot)com
    Servo Controller Upgrades
    http://www.youtube.com/user/Islaww1


    "We can not solve our problems with the same level of thinking that created them"
    Albert Einstein


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