1 Topic by rsheldiii (edited by rsheldiii 2013-08-01 21:12:52)

  • rsheldiii
  • Member
  • Offline
  • Registered: 2013-05-12
  • Posts: 18

Topic: S3 y-axis groaning

Hi there,
for some reason no matter how much I align the belts i cannot get my y-axis to stop complaining. Part of the problem I'm sure is my back right pulley mount usually refuses to move - it catches and requires a lot of force to get it to unseat. I'm not able to slide it around on the rod, even after greasing it. I try to align it as well as possible, but it's a lot harder to do by eye. I'm wondering if the catching means the rod is bent, which would explain why it's impossible to get the groaning to go away.

if I have a bunch of slack in all the pulleys, the groaning is a lot better, but still noticeable, which brings me to another question: how tight are the pulleys supposed to be? the belt adjustment video he just says 'not too tight,' which is kind of useless. The slack I need to give it to reduce the noise causes inaccuracies in the prints, as well.

here's a video: http://www.youtube.com/watch?v=fk2kZVkt … e=youtu.be

2 Reply by adrian (edited by adrian 2013-08-02 12:33:32)

  • adrian
  • Member
  • Offline
  • From: Canberra, Australia
  • Registered: 2013-01-15
  • Posts: 1,623

Re: S3 y-axis groaning

its most likely the front idler brackets... either the brackets themselves flexing, or a lack of lubrication on the pulleys and the sides of the pulleys (they rub).

Trying grabbing the brackets at the front and lightly holding them to feel if they are moving when the y-axis moves (run a print with multiple layers so you have time to work stuff out). Or if its the front pulleys rubbing. And yes, the tighter the belts, the more they flex, the louder the groans...

But its not going to be an alignment issue or at all related to the pulleys on the y-axis link rod.