Step 07.28 — Tighten the carriage bolts¶
Step 28 of 39 · Chapter 07 — A/B belts and tensioning
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Parts: none.
Do: Fully tighten the four M3×8 belt-clamp screws first, as p.141's middle panel shows. Then "Fully tighten the carriage bolts." These thread into plastic and captive nuts, so stop at solid (not specified — snug).
Check
Pull hard on each belt at the carriage: nothing slips. The X carriage still runs the full X rail without fouling.
What you're looking at
Everything closed and firm at last. These screws go into printed plastic and captive nuts, so "solid" is the stopping point: the manual gives no torque figure, and a stripped insert here means splitting the carriage back open with both belts threaded through it.
Good stopping point · ~80 min since the last one
the long one, and it has no safe interior stop: both belts routed, both ends captured in the carriage, tails equalised and the carriage bolts tightened. Only stop here once the carriage is closed and both belts are held at both ends.
Source: Voron manual p.141