Step 07.21 — B belt: run right along the rear and turn 90° at the rear-right idler stack¶
Step 21 of 39 · Chapter 07 — A/B belts and tensioning
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Parts:
- the B belt · already on the bench
Do: Run the belt right along the rear extrusion to the A drive unit. Wrap it 90° round that unit's idler stack, not the A motor pulley beside it, and turn it forward down the right Y extrusion.
Check
The A motor pulley still turns freely. B runs along the rear below A, not touching it, and leaves forward as the single right-side run.
What you're looking at
The rear-right corner is the A drive unit and, like the rear-left, carries a motor pulley and a plain stack. B wraps the plain stack only, smooth back on it, and turns from the rear extrusion to forward down the right Y.
Source: Voron manual p.138