584,833 active members*
5,450 visitors online*
Register for free
Login
Results 1 to 5 of 5
  1. #1
    Join Date
    Jul 2014
    Posts
    2

    Stepper does not turn

    I got a 7x7 kit from zen recently and put it together.I got Arduino CNC Shield for Arduino UNO, put it together, wired & powered up. I use grbl as controller.

    When I send a move command for 1 axis stepper makes a small move to the direction and than makes a grinding noise.

    I uploaded a video to show the exact problem:
    Stepper issue - YouTube

    I was tested it with 5 and 20 steps, it didnt make any difference


    I plugged only 1 driver and 1 stepper (X axis) and also tried Y & Z (1 at a time) but the results were same.


    I have Nema 17 steppers (model# SST43D2121) and I use 20V 14 A power supply.



    I am attaching 2 photos, 1 shows the whole machine and 2 show the board.


    Thanks for helping me out.

    Attachment 243434Attachment 243436

  2. #2
    Join Date
    Oct 2012
    Posts
    179

    Re: Stepper does not turn

    That is a stalled stepper. Uncouple and test. Check the polarity on your motor connections. It could be that one phase is trying to run opposite the other.

  3. #3
    Join Date
    Jul 2014
    Posts
    2

    Re: Stepper does not turn

    I tried all possible combinations, no luck.

    PS: There is no mechanical jam, before wiring I attached a battery powered screw driver to the outer shaft of stepper and moved each axis all the way back and forward. All 3 axis moves smoothly, I also can turn the steppers by hand.

  4. #4
    Join Date
    Oct 2012
    Posts
    179

    Re: Stepper does not turn

    There are 6 leads coming out of the motor. What is happening with the other 2 leads?

  5. #5
    Join Date
    Jun 2004
    Posts
    6618

    Re: Stepper does not turn

    I would dress up the power connections on the Pos and Neg terminals. Too easy for a short to occur there. Maybe a bit of shrink wrap. I killed my very first driver kit with and incidental contact of a motor wire. It didn't feel good.
    If the acceleration is set too high, then the motor cannot get up to speed and will foul out missing steps. Even with it not mounted to anything.
    Lee

Similar Threads

  1. No stepper turn
    By Georgie in forum Open Source Controller Boards
    Replies: 6
    Last Post: 05-16-2013, 08:19 PM
  2. stepper motors will not turn
    By markymark1 in forum Stepper Motors / Drives
    Replies: 4
    Last Post: 03-21-2013, 05:18 PM
  3. Stepper Motors Turn Wrong Way
    By henryblowery in forum Stepper Motors / Drives
    Replies: 6
    Last Post: 06-01-2009, 12:58 AM
  4. stepper motors turn off
    By gaffa in forum CNC Machine Related Electronics
    Replies: 2
    Last Post: 03-15-2009, 03:07 PM
  5. how turn stepper motors off when not in use in Mach 3?
    By uplb in forum Mach Software (ArtSoft software)
    Replies: 3
    Last Post: 01-01-2009, 03:24 PM

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
  •