Belt-Tension Problems
I have a vcore 3.1 enclosure. However, there are belt tension problems, what could be the problem?
21 Replies
optimistic-gold•12mo ago
and 300x300
I just watched this video https://www.youtube.com/watch?v=M-yc_XM8sP4
and i think he mentioned that a broken idler can cause those rugged edges. Check you belt path and Idlers?
3D Printers & a Whiteboard
YouTube
How to Read and Analyze Input Shaper Graphs Generated by Klipper
This video is supposed to be a brief overview on what the input shaper graphs can tell us. It is the first video of a series of videos which will give a more in depth view on the kinematic system and input shaping in Klipper.
As always: feel free to jump to those parts, that help you with your problems:
00:00 Intro
00:57 What we can learn from...
check, if all idlers turn easily when not belt is grabbing them.
Sometime you tighten the screws to hard and they compress the idler stack.
optimistic-gold•12mo ago
optimistic-gold•12mo ago
I loosened all the screws and tightened them hand-tight so that the bearings are not compressed
That barely changed it 🤔
But now they are more in sync
Try inputshaping now. Would like to see that graph
optimistic-gold•12mo ago
Okay, first I have to attach the cables to the toolhead
Where are they now?
optimistic-gold•12mo ago
I mean with cable ties
Do that and then measure again 
optimistic-gold•12mo ago
optimistic-gold•12mo ago
optimistic-gold•12mo ago
optimistic-gold•12mo ago
standing in front of it and have no plan 😄
Your printer seems to be a rattle
optimistic-gold•12mo ago
Yes, but what can I do now?
find whatever is vibrating/loose
optimistic-gold•12mo ago
Screws are tightened
cant tell you more actually at this point
optimistic-gold•12mo ago
and what about the belt tension rushes
oh yes, I use the adxl from ebb42
On a stock 3.1 300 you should be able to get better results than this. Its a lot of work, but personally I'd take the entire gantry assembly apart and all idlers, check the belt path, inspect each idler stack. re-assemble, make sure idlers/shims are in the correct order. check each one after assembly, there should be no upward play and spin freely. It will take the better part of the day if you take your time. I would then assemble the printhead with just the bare necessities to measure belt and resonances. When the belts are attached, manually move the gantry and printhead, feel if it moves smoothly. No judders. Also check the belt does not run up or down on the idlers (which is an indications of frame being out of square, or idler stacks (usually front one) not being perpendicular to the belt path).