Need to update the ohai with information on how to tension the belts on the X end's left /right. Also add how to make adjustments if the belts are rubbing.
@DaniAO These things are already there, unless this is insufficient:
Step 4: https://ohai.lulzbot.com/project/x-end-left-assembly/quiver/
Step 3: https://ohai.lulzbot.com/project/x-end-right-assembly/quiver/
Step 24: https://ohai.lulzbot.com/project/final-assembly/quiver/
It has to check for rubbing at the frame QA checksheet but there are no instructions in the x-end or frame assembly instructions. I think it would make more sense if we put what is currently step 24 in the finals into a QA checksheet completion instructions at the end of the frame assembly, or maybe have it both places.
@kent I guess I am just confused on order of operations here. Wouldn't it make more sense for only finals to adjust the belts on x ends after they install the x axis? Since we would be influencing the belt path with extra weight at that point? Having it adjusted at the sub-assembly and frame tier will may be repeating work that only needs to be done once.
Good questions. I don't think it changes the belt path when you add the x rods and toolhead and stuff but maybe it does and I've just never noticed it.
The idea is that the frame assemblers would set it and the finalist would just have to check it. If it changes a lot, I would suspect something else is going on like the compression hardware isn't set.
@wolffchadd have we noticed the belts changing where they ride on the z-idlers after installing the x-axis?
There are still no steps added to the OHAI in regards to setting the Z-belt tension. This is a step that should be completed before it gets to calibration. Also, it should be communicated verbally to the assemblers when the change is made, so it is not accidentally skipped over.
@wolffchadd @kent @EricNugent @logan @DaniAO @robert
@paulette The QA sheet for Finals has a step which might be too vague if we are seeing it slip through: The belts are aligned on the idler bearings and properly tensioned.
I believe @franklin and @oliver are currently speaking to the appropriate departments to ensure that the grub screws are not bottomed out when tightening the belt for the X ends. Hopefully this will help reduce the amount of machines that show up in calibration with loose belts.
Please note that Presub was doing a build process that was requested by MER.
MER has now talked to us and asked us to go back to the original build method which we will be doing. This should address the issue that is occurring.
Closing this as resolved for the moment as clarifications on procedures have been implemented. Will re-open if this is found to be ineffective in the amount of machines that need re-tensioned on the x ends.