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Slide motor holder 4 onto the forearm Loading 3D view…
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Slide the wrist motor holder onto the end of the forearm, with its wire groove Wire slot. A channel printed into a part for the motor cable to lie in. Turn the part so the channel is on the side the cables run down.Source: waveshare.com src It has no screws of its own: motor 4's screws will clamp it in the next step. src instructions — Like the shoulder holder it has no screws of its own: motor 4's side screws clamp it to the forearm in the next step. Done when The holder is on, with its groove on the cable side.
lerobot/docs/source/so101.mdx#joint-4 "Slide over motor holder 4." waveshare.com Follower step 11: attach F7 to F6 with the wire groove and harness on the same side SO-ARM100/STEP/SO101/SO101 Assembly.step placement check (viewer/public/geometry/placements.json): Motor_holder_SO101_Wrist sits on the forearm and encloses 44% of servo 4: motor holder 4 SO-ARM100/STEP/SO101/SO101 Assembly.step placement check (pipeline hole test): no fastener passes through this part until motor 4 is fitted Orientation: Wire groove on the harness side (Waveshare).
Notes: Like the shoulder holder it has no screws of its own: motor 4's side screws clamp it to the forearm in the next step.
Check: Holder seated; wire groove on the same side as the cable run.
Motor slot: wrist_flex · ID 4 · STS3215 1:345 ·
7.4V servo on a 5V supply; 12V servo on a 12V 5A+ supply (optional variant);
How we placed it: Part role confirmed by placement in the upstream assembly STEP: Motor_holder_SO101_Wrist sits on the forearm and encloses 44% of servo 4: motor holder 4.
You need Wrist motor holder Motor holder (wrist side) motor-holder-so101-wrist details Forearm Under arm (forearm) under-arm-so101 details Sources (4) How we placed it Part role confirmed by placement in the upstream assembly STEP: Motor_holder_SO101_Wrist sits on the forearm and encloses 44% of servo 4: motor holder 4.