Step 05.9 — Bolt the B drive and check the bridge¶
Step 9 of 48 · Chapter 05 — Gantry: X and Y axes, XY joints, X carriage, titanium backers
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Parts:
- M5×10 BHCS ×4 · Fasteners, Tools & Misc box
Do: Fit the last four M5×10 BHCS, snug. Then compare with p.87's lower elevation: drive frames parallel, and the two pulleys one belt plane apart, one high and one low, as drawn.
Check
Drives parallel, no twist along the bridge, pulleys one plane apart, all eight M5×10 in and snug. Nothing here is torqued yet.
What you're looking at
With both drives bolted on, bridge plus drives is a single rear beam: the fixed back edge of the gantry, and the reference everything else is built to. p.87's lower elevation is the alignment check.
Tip
A's pulley sits high, B's low; p.87's elevation views from behind, A on the left. Never move a pulley to match them: the 10 mm step keeps the belts apart.
Good stopping point · ~30 min since the last one
XY bridge bolted to both drive units, all eight M5×10 snug, none torqued. Lay the assembly flat, motors down. Do not start a Y rail: a rail must be centred and screwed down in one sitting.
Source: Voron manual p.87