Step 07.8 — Cut both belts to the same length¶
Step 8 of 39 · Chapter 07 — A/B belts and tensioning
(no image — see text)
Parts:
- Gates 2GT open belt, 6 mm wide, two equal lengths · consumable
Do:
- Measure 2000 mm from the free end and fold the belt back there.
- Lay the doubled belt flat and cut through both layers at the fold, square across.
- Cut the reel side level with the free end.
Check
Both belts side by side against a square edge: the far ends flush. About 100 mm of tail reaches each clamp (verify on bench).
What you're looking at
No picture, and the most consequential measurement in the chapter. Both belt paths are the same length by design, so two belts of identical length arrive at identical tension. A few millimetres of difference is a permanent imbalance the tensioners cannot remove.
Tip
Mark one belt A with a dot on the smooth back near each end: it goes into the upper slot. Once both are threaded they are impossible to tell apart.
Tip
Voron's own method, p.125: route the first belt off the reel as A, mark its length, remove it, cut it, then cut the second against it.
Good stopping point · ~30 min since the last one
heat-set inserts and M3 nuts in the carriage halves, stop screws set to 3 mm, both belts cut to matched length and marked A and B. Coil the two belts and bag them; the next segment is the one that cannot be broken.
Source: Voron manual p.125 · LDO 350 Rev D BOM · LDO Build Notes § Voron 2.4 build FAQ · onetwo3D Voron 2.4 350 BOM