X-belt rubs
Closed, ResolvedPublic

Description

The x-belt rubs along the belt clamp when it gets close to the home position. I do not know if this will be an issue going forward since it may need a part re-design. But if we do not want any belt rubbing like our mock checklist says then this will be a problem.

MikeR created this task.Dec 11 2018, 4:34 PM
MikeR triaged this task as Normal priority.
logan added a comment.Dec 12 2018, 7:08 AM

I noticed this while building as well, I wouldn't consider it acceptable as the rub is audible.
Keeping lessons learned in mind from TAZ 6, this is something our customers will notice and will be concerned about.

west added a comment.Dec 12 2018, 7:14 AM

Where is it rubbing on the tensioner clamp

west added a comment.Dec 12 2018, 11:44 AM

That doesnt give me an answer

@west

Where is it rubbing, on the tensioner clamp?

Yes

Where is it rubbing on the tensioner clamp?

The entire portion of the tensioner clamp that is above the belt.

west added a comment.Dec 12 2018, 1:07 PM

@logan is your tensioner fastened securely against the x carriage?

MikeR added a comment.Dec 12 2018, 1:11 PM

I know mine is.

logan added a comment.Dec 12 2018, 1:12 PM

@west Do you mean that the tensioner should be bottomed out against the x carriage? If so, yes.
And yes it still rubs when fully tightened against the x carriage.

west added a comment.Dec 12 2018, 1:15 PM

Is it barely touching when it reaches x home or is it rubbing for a couple mm

logan added a comment.Dec 12 2018, 1:17 PM

If you move the x carriage around x min by hand, you can hear the belt rubbing on multiple teeth.
Doesn't bottoming out the tensioner kinda remove ability to adjust?

MikeR added a comment.Dec 12 2018, 1:19 PM

@west it will start rubbing several mm away from the x home.

The newest part doesnt rub on quiver 3 and 18, its close but just clears and touches the belt when it hits the home position. @EricNugent what are your findings with this part on quiver 6 and 7

@west Quiver 7's belt touches during the final 40mm of the X axis when homing.

Quiver 6 is currently printing, we will verify once it finishes.

MikeR added a comment.Wed, Dec 26, 1:05 PM

I will post my findings tomorrow after my print finishes.

west added a comment.Wed, Dec 26, 2:06 PM

@EricNugent is the tensioner all the way tight against the x carriage?

@west nope, I can tilt it up and down a little. Wouldn't that conflict with it being a tensioner if it was meant to be installed the full length of the threads?

west added a comment.Wed, Dec 26, 2:22 PM

We want to have the belt tension above the minimum so why not tighten it more?

west added a comment.Wed, Dec 26, 2:23 PM

Since the x is double shear the chance of shearing the motor shaft is greatly reduced

west added a comment.Wed, Dec 26, 2:24 PM

I suppose if people see an issue with that I could widen the tensioner and create a pocket in the x carriage as a guide to keep it straight even if it isnt fully tight

west added a comment.Wed, Jan 2, 2:10 PM

Another solution is to mirror the x carriage and the interface board mount. The tensioner would be on the right side where there is more room

west added a comment.Wed, Jan 2, 4:12 PM

rTAZQUIVER7249c41beabe

Commit adds a version of the interface board mount that will work with the mirrored x carriage

@MikeR @EricNugent not certain who tested this on MER machines. Can whoever did please provide some feedback on these changes?

@Steven Installed on Quiver 7 this morning, belt is fully tightened and has a clear path with no rubbing.

Steven closed this task as Resolved.Wed, Jan 9, 12:27 PM

@EricNugent thanks! This is now merged into master.

MikeR added a comment.Wed, Jan 9, 12:55 PM

I had the same results.