Ch 0411 / 38
Step 04.11 — A idler: fit the M3 washer and M3×40 SHCS¶
Step 11 of 38 · Chapter 04 — A/B drive units and front idlers
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Parts:
- 1× M3 washer · Fasteners, Tools & Misc box
- 1× M3×40 SHCS · Fasteners, Tools & Misc box
Do:
- Washer under the M3×40 head; enter it horizontally through the frame's front wall, the face away from the extrusion, into the arm's insert.
- Run it in only until the arm meets the wall, snug. Step 07.5 sets tension.
Check
Snug, not torqued (not specified — snug). The arm sits against the wall, washer captive, head flat on the frame's front face.
What you're looking at
Manual p.67: the M3×40 entering horizontally through the idler frame's front wall and threading into the insert in the arm's back wall. It is the belt tensioner: winding it in draws the arm toward the wall. It does not clamp the frame halves.
Source: Voron manual p.67 · Video: Part 3 @1:07:00