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IndustryArena Forum > WoodWorking Machines > Commercial CNC Wood Routers > Stepper Motor acting erratic Laguna Swift 4x4
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  1. #1
    Join Date
    Aug 2015

    Question Stepper Motor acting erratic Laguna Swift 4x4

    I have a Laguna Swift 4x4 CNC router, bought it in 2016. I wasn't really sure where to post this thread so excuse me if I'm in the wrong subforum.

    I recently moved shops and now one the stepper motors acts really odd and super jerky. It is one the Y motors. I've had this problem before, but only once or twice, and it would just disappear after a restart. Now it just wont go away.

    The good motor will spin the correct direction, while the bad one will go randomly and only correct itself once the whole gantry is moving. It shakes the whole gantry sometimes and I'm afraid of damaging the frame or rails or something. It's the moment it first move that's the problem.

    I recorded a video of the problem.


    While I've personally ran the thing for 4 years, I know very little about how internals work. I've included photos on the internals if that helps.

    Thank you

  2. #2
    Community Moderator Jim Dawson's Avatar
    Join Date
    Dec 2013

    Re: Stepper Motor acting erratic Laguna Swift 4x4

    Sounds like a bad wire connection at a terminal. I would go through and tighten all of the terminals and unplug and re-plug anything that will unplug.
    Jim Dawson
    Sandy, Oregon, USA

  3. #3
    Gold Member
    Join Date
    Apr 2004

    Re: Stepper Motor acting erratic Laguna Swift 4x4

    Switch the leads to the motor that's misbehaving with those from a motor that's working okay. If the problem migrates to the previously good motor you've at least eliminated the motor as the source of the problem. Then start doing all that stuff Jim suggests above. If none of that helps, you probably have a driver that's gone bad.
    Andrew Werby

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