Step 02.21 — Fit the 188 mm closed belt loop over the 80T pulley¶
Step 21 of 44 · Chapter 02 — Z drives, Z idlers, Z rails, deck panel
Tap to enlarge
Parts:
- Gates 2GT closed loop 6 mm × 188 mm ×4 · Belts, Chains & Fans box
Do: Drop one closed belt loop over each 80T pulley, teeth inward, before the shaft goes into the housing. The loop has no join, so this is the only moment it can go on.
Check
Four loops, each seated in its 80T pulley's teeth, hanging free, not twisted.
What you're looking at
Manual p.34: the closed 188 mm belt loop dropped over the 80T pulley. It is a continuous loop with no join, so it has to be threaded on before the drive is closed.
Caution
Rev D+ / LDO: LDO publishes no deviation for the Z belt loop, the 16T/80T pulleys or the Z gear ratio — the Build Notes for p.22–51 cover only p.29–30 (deck supports) and p.39 (stepper wiring). The kit's Klipper config confirms the stock arrangement: [stepper_z] rotation_distance: 40, gear_ratio: 80:16. Use the 188 mm loops as supplied. src
Good stopping point · ~35 min since the last one
four complete shaft assemblies: 20T pulleys at 33 mm, bearing and precision-spacer stacks built, 80T pulleys threadlocked, and the 188 mm belt loops hung on. The bearings are only slid onto the shaft here, so nothing is mid-assembly. Do not start Step 02.22 until you can close a drive in one sitting.
Source: Voron manual p.34 · LDO Build Notes (Rev D) · LDO Klipper config leviathan-printer-rev-d-sbv2.cfg · Video: Part 1 @3:29:28