Step 06.25 — Release the gantry and check it moves freely¶
Step 25 of 42 with a helper · Chapter 06 — Z axis (and Chapter 06b — Gantry squaring)
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Parts: none.
Do:
- Cut any long zip ties and unscrew the four mid-rail stoppers.
- Refit the rubber stoppers at the rail bottoms; printed stops stay on top.
- Turn each Z drive pulley by hand and watch that corner rise.
Check
The gantry stays where the belts hold it unsupported, and turning any Z drive raises that corner smoothly with no slip or rubbing.
Helper Watches the corner you turn and says whether it rises smoothly, with no slip.
What you're looking at
With four belts on, the gantry holds its own weight; the zip ties and mid-rail stoppers were only scaffolding. Turning a Z drive by hand is the first end-to-end test of a corner. Never spin a connected stepper fast: back-EMF kills drivers.
Good stopping point · ~35 min since the last one
gantry squared against the A/B drives, X axis locked and released, everything moving freely by hand. Leave the machine powered off.
Source: Voron manual p.122