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Slide the first motor holder over motor 1 Loading 3D view…
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Slide the base motor holder down over motor 1 so it sits flat on the base. src Fix it with 2 small self-tapping screws, Self-tapping screw. A screw that cuts its own thread into the plastic as you drive it. These are the smallest screws in the kit and hold each motor in its printed bracket. No public source confirms the exact size yet (D-001).Source: lerobot/docs/source/so101.mdx#joint-1 · waveshare.com src lerobot/docs/source/so101.mdx#joint-1 — "Slide over the first motor holder and fasten it using two M2x6mm screws (one on each side)." instructions — The two side screws are horizontal and thread through the holder into the base, 17 mm clear of the servo: they hold the holder, not the motor. check — Holder sits flush on the base; one motor-tab screw on each side; one motor-1 cable routed out of the base opening. fasteners — 2 × motor-tab-screw Bring one cable from motor 1 out through the opening in the base. src check — Holder sits flush on the base; one motor-tab screw on each side; one motor-1 cable routed out of the base opening. waveshare.com — Follower step 3: thread one wire out of the middle port of F1, the other into the wire groove of F2 Done when The holder sits flat, one screw on each side, and a cable from motor 1 comes out of the base.
Upstream numbers the follower's steps; this leader step is the same build step (extends F-012).
lerobot/docs/source/so101.mdx#joint-1 "Slide over the first motor holder and fasten it using two M2x6mm screws (one on each side)." waveshare.com Follower step 3: thread one wire out of the middle port of F1, the other into the wire groove of F2 SO-ARM100/STEP/SO101/SO101 Assembly.step placement check (viewer/public/geometry/placements.json): Base_08p (= base motor holder) encloses 74% of servo 1 and sits on the base SO-ARM100/STEP/SO101/SO101 Assembly.step placement check (pipeline hole test): both side screws pass through Base_08p holes, horizontal, 16.6 mm from servo 1 Notes: The two side screws are horizontal and thread through the holder into the base, 17 mm clear of the servo: they hold the holder, not the motor.
Check: Holder sits flush on the base; one motor-tab screw on each side; one motor-1 cable routed out of the base opening.
Motor slot: shoulder_pan · ID 1 · STS3215 1:191 ·
7.4V servo on a 5V supply;
How we placed it: Part role confirmed by placement in the upstream assembly STEP: Base_08p (= base motor holder) encloses 74% of servo 1 and sits on the base.
You need Base motor holder Base motor holder base-motor-holder-so101 details Base Base base-so101 details Small self-tapping screw (motor screw) Motor-tab screw, M2-class self-tapping motor-tab-screw unverifiedno source yet Not checked yet: no public source confirms this. Treat it as a best guess and report what you find.
Sources disagree and no kit has been measured (D-001, open). Upstream default = the assembly STEP, which models 24 positions per arm: 22 x "Type I Cross Recessed Fillister Head Tapping Screw ANSI B18.6.4 1-42 x 0.1875 Type AB" (≈ ø1.9 x 4.8 mm) and, for the two screws that enter motor 1 from above, 2 x "0-48 x 0.1875" (≈ ø1.5 x 4.8 mm). Vendor/doc variants: LeRobot "M2x6mm screws (smallest screws)"; Waveshare "pointed screws". The Feetech datasheet gives no tab screw and ships "No Accessories". Qty = count used across the LeRobot steps (24 + 21 positions); a kit inventory settles the spec and count. Seating per screw is read from the STEP by the pipeline (shank through a hole of which printed part) and drives what the 3D view shows at each step.
×2 details Phillips screwdriver #0 · PH0 tool details Phillips screwdriver #1 · PH1 tool details Sources (4) Upstream numbers the follower's steps; this leader step is the same build step (extends F-012).
How we placed it Part role confirmed by placement in the upstream assembly STEP: Base_08p (= base motor holder) encloses 74% of servo 1 and sits on the base.