Problem Harmonic drive knocking noise


Results 1 to 5 of 5

Thread: Harmonic drive knocking noise

  1. #1
    Member NORDLE's Avatar
    Join Date
    Sep 2016
    Location
    RUNECK
    Posts
    2
    Downloads
    0
    Uploads
    0

    Default Harmonic drive knocking noise

    https://youtu.be/XhlZheT1fu0

    Hello, i recently got a 4th Axis harmonic drive for my diy mill. It works totaly fine but makes some strange knocking noise when spinning in one direction (clock wise @12sec in the video).
    Is this something to worry about?

    Similar Threads:


  2. #2
    Community Moderator Jim Dawson's Avatar
    Join Date
    Dec 2013
    Posts
    4836
    Downloads
    0
    Uploads
    0

    Default Re: Harmonic drive knocking noise

    It sounds more electronic than mechanical. Like the stepper motor is skipping a beat or something. I would remove the stepper from the unit and see if the same thing occurs. Then rotate the harmonic drive by hand and maybe you can feel something. Maybe put a shaft in an electric drill to rotate the harmonic drive to check for a mechanical problem.

    Jim Dawson
    Sandy, Oregon, USA


  3. #3
    Member
    Join Date
    Mar 2006
    Location
    US
    Posts
    37
    Downloads
    0
    Uploads
    0

    Default Re: Harmonic drive knocking noise

    If you've had the drive apart, check to be sure the flex spline isn't off-center. If the spline is installed correctly where it only contacts the circular spline 180* apart. If the flex spline is even 1 spline off, you will get contact between non-engaged spline tips on one half of the circumference, so you'll get knocking/tapping in one direction as the splines snap over each other.



  4. #4
    Member NORDLE's Avatar
    Join Date
    Sep 2016
    Location
    RUNECK
    Posts
    2
    Downloads
    0
    Uploads
    0

    Default Re: Harmonic drive knocking noise

    Today i tried to spin my drive by hand couldn't hear any knocking tough. Also wen spun by the stepper the knocking seems to just went away. All it makes now is a gentle grinding noise, its a bit uneven tough. Does not sound too bad, but as i have no previous experience with harmonic drives dunno if thats normal?



  5. #5
    Member
    Join Date
    Mar 2006
    Location
    US
    Posts
    37
    Downloads
    0
    Uploads
    0

    Default Re: Harmonic drive knocking noise

    Check through this.

    I suspect your problem is covered on page 35 out of 57.

    https://www.harmonicdrive.net/_hd/co..._Component.pdf



Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

Harmonic drive knocking noise

Harmonic drive knocking noise

Harmonic drive knocking noise