Step 07.15 — A belt: U-turn at the front-right idler¶
Step 15 of 39 · Chapter 07 — A/B belts and tensioning
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Parts:
- the A belt · already on the bench
Do: Wrap the belt 180° around the front-right idler bearing stack and bring it back rearward, parallel to the run you just made.
Check
Two right-side runs, parallel and not touching. Smooth back on the idler, teeth away from it on both runs: outboard outbound, inboard returning.
What you're looking at
The front-right idler is a 180° turnaround: the belt goes round it and comes straight back, which is why the right-hand side ends up with two parallel runs. It is the smooth back of the belt that rides this stack, not the teeth.
Tip
If the stack will not take the belt, remove that idler's M3×40 SHCS tensioner screw, thread the belt, refit, then redo Step 07.5. No drive or joint has that screw.
Source: Voron manual p.134