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Single layer shifts- can I use a belt tensioner?

Posted: Wed Jul 29, 2015 8:24 am
by helix_3
I have been getting layer shifts recently, but usually only 1 or 2 layers before correcting. It also always happens in the X direction, but not the Y direction.

Re-tensioning the X-axis stepper every week seems to help. Can I use a GT2 tensioner to help keep tension constant?

Re: Single layer shifts- can I use a belt tensioner?

Posted: Wed Jul 29, 2015 2:27 pm
by chad
Double check that your set screw on the belt pulley is tight. Second, move the x back and forth and make sure that it isn't binding.

chad

Re: Single layer shifts- can I use a belt tensioner?

Posted: Wed Jul 29, 2015 4:01 pm
by PcS
Use z hop and slow x y speed down to 200 and report back if problem still persists.

Re: Single layer shifts- can I use a belt tensioner?

Posted: Wed Jul 29, 2015 5:01 pm
by jimc
Yes i agree with both these guys. unless your belt is really loose then thats not the issue.

Re: Single layer shifts- can I use a belt tensioner?

Posted: Wed Jul 29, 2015 7:58 pm
by swbluto
chad wrote:Double check that your set screw on the belt pulley is tight.
Indeed, tighten the x-motor's set screw down and loctite it down for good measure. I had this problem, and that resolved it.

Re: Single layer shifts- can I use a belt tensioner?

Posted: Thu Jul 30, 2015 2:20 pm
by helix_3
Okay, set screw is tightened, loctite is applied, binding isn't present, and I'm already printing at sub-100 mm/s speeds.

Re: Single layer shifts- can I use a belt tensioner?

Posted: Thu Jul 30, 2015 4:31 pm
by rpollack
try swapping the x and y connectors where they plug into rambo. see if the problem follows the axis.

have you changed the firmware recently?

Re: Single layer shifts- can I use a belt tensioner?

Posted: Fri Jul 31, 2015 2:29 pm
by helix_3
rpollack wrote:try swapping the x and y connectors where they plug into rambo. see if the problem follows the axis.

have you changed the firmware recently?

After strengthening the x-axis hub's connection, there appeared to be an immediate improvement in quality.

If the problem re-surfaces, I will try the connector swap. Also, I have not changed the firmware recently.

Re: Single layer shifts- can I use a belt tensioner?

Posted: Sun Aug 02, 2015 8:09 am
by Kulturfolger
Its not the belt but the extruder stepper is not fastened enough!