Step 08.11 — Fit the latch shuttle and the BMG thumbscrew assembly¶
Step 11 of 65 · Chapter 08 — Toolhead: Stealthburner, Clockwork 2, Revo HF, Nitehawk-SB V2
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Parts:
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[a]_latch_shuttle×1 · bin 08-CW2 - Thumb Screw Kit ×1 · Motion box
Do: Seat the latch shuttle on top of the guidler's boss, hook facing the latch side, p.18 right. Slide the kit's spring then washer onto the thumbscrew, pass it through the boss and thread it into the shuttle's insert.
Check
The shuttle is captive and draws against the spring by hand. The spring measures roughly 12 mm long, 6 mm OD, 1 mm wire.
What you're looking at
The thumbscrew, spring and washer are the extruder's grip adjustment; the latch shuttle is what they thread into. Winding the thumbscrew in compresses the spring and pushes the guidler arm, and so the idler, harder onto the filament.
Tip
a substitute spring of the wrong size changes the tension curve and prints badly; source the Bondtech part before continuing.
Source: SB manual p.18