1. #1
    Hi everyone, I haven't used my machine for a while, just got back from holiday and ran a program on my machine, all good but when the spindle stopped the y axis started stepping back for approx 3 complete revs of the lead screw and i have no idea why it's doing it. has any one any ideas what the problem is ?

  2. #2
    Is it repeatable? If not, consider what's changed from when the fault was apparent to now - moisture, etc.

    Almost certainly electrical noise, poor earthing, or inductive coupling (or, more insiduously, hardware failure exacerbated by those).

    Try, if you can, swapping the X/Y axis feeds to confirm that the problem follows the change (so that the X-axis moves, not Y) - that will tend to isolate the problem to the control box. From there - don't know your machine (other than it's chinese) then look into the control box to check the integrity of cabling to the stepper driver on the faulty axis, and the cabling from the BoB to the driver. Check supply voltages are common, try - if you can - swapping suspect for working drivers (again to localise the area of problem). Pay attention to the feed to the spindle, and how this is routed near signal lines - look if you can provide separation or screening. Check that the spindle feed is shielded and that this is earthed with a star topology with the rest of the control electronic supplies.

    A photo inside the control box would be interesting.

  3. #3
    Thanks for your reply, the fault isn't there when the spindle is disabled, if that helps

Similar Threads

  1. BUILD LOG: Strange X axis design
    By Zeroaxe in forum DIY Router Build Logs
    Replies: 9
    Last Post: 09-01-2017, 09:40 PM
  2. Strange problem, possibly missing steps?
    By Philly in forum Chinese Machines
    Replies: 5
    Last Post: 26-10-2012, 05:36 PM
  3. Z acting Strange
    By m.marino in forum Machine Discussion
    Replies: 2
    Last Post: 06-03-2012, 08:30 PM
  4. Replies: 2
    Last Post: 21-04-2010, 08:50 PM
  5. a strange question
    By Dan Brown in forum Programmers Corner
    Replies: 15
    Last Post: 21-12-2009, 12:00 PM

Bookmarks

Posting Permissions

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