Step 10.54 — Identify your umbilical and its two connectors¶
Step 54 of 80 · Chapter 10 — Wiring and Checkpoint #1
Gather for this segment — steps 10.54–10.58 (~25 min)
Fasteners, Tools & Misc box
- M3×8 SHCS (verify on bench) ×1
- M3 roll-in T-nut (verify on bench) ×1
Tools and consumables
- multimeter
Already on the bench
- the toolhead umbilical cable
- the fitted
usb_adapter_mount_partial_cover· bin 08-CW2 - the long supplied grounding cable, ring already on the USB adapter
Parts:
- the toolhead umbilical cable · already on the bench
Do: Confirm the toolboard end is an Amass XT30(2+2)-F, the partially overmolded variant, and the bay end a Micro-Fit 3.0. Nominal bend radius 28 mm, max operating temperature 105 °C.
Check
Both connectors are undamaged and the sheath is unnicked over its whole length.
What you're looking at
The umbilical is the thick cable between the bay and the toolhead, carrying 24 V and USB together. The Amass XT30(2+2) at the toolboard end is a four-contact power-plus-signal connector; the Micro-Fit 3.0 at the bay end is the latching rectangular one.
Caution
Rev D+ / LDO: never plug or unplug the Micro-Fit end with the machine powered — it can take out the Nitehawk or the Pi. src
Source: Nitehawk-SB V2 doc § Umbilical cable · Nitehawk-SB V2 doc § Cable pinout — adapter side · LDO board doc image nk36_cable_comparison.jpg · Video: Part 8 @1:35:03 (differs: no toolboard — loom to the mainboard; this kit runs a Nitehawk-SB V2 on one USB+24 V umbilical)