Pointing & Momentum Control Assembly
Reaction wheels, gyros, and star trackers that slew the observatory between targets and hold it steady enough for the fine guidance loop to deliver milliarcsecond pointing. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
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Bill of materials
4 top-level lines · 20 rows shown · 484 parts total · indented to 3 levels| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Reaction Wheel Assembly 5 parts | space-telescope-reaction-wheel | 6× | 6 | 28 | assembly |
| 1.1 | Stator Assembly 3 parts | stator-assembly | 1× | 6 | 3 | assembly |
| 1.1.1 | Stator Core (laminations) | stator-core | 1× | 6 | — | part |
| 1.1.2 | Copper Winding | copper-winding | 1× | 6 | — | part |
| 1.1.3 | Slot Insulation | stator-insulation | 1× | 6 | — | part |
| 1.2 | Rotor Assembly 4 parts | rotor-assembly | 1× | 6 | 19 | assembly |
| 1.2.1 | Rotor Shaft | rotor-shaft | 1× | 6 | — | part |
| 1.2.2 | Rotor Core | rotor-core | 1× | 6 | — | part |
| 1.2.3 | Neodymium Magnet | neodymium-magnet | 16× | 96 | — | part |
| 1.2.4 | Ball Bearing | ball-bearing | 1× | 6 | — | part |
| 1.3 | Ball Bearing | ball-bearing | 2× | 12 | — | part |
| 1.4 | Hall Sensor | hall-sensor | 3× | 18 | — | part |
| 1.5 | Wheel Vibration Isolator | space-telescope-wheel-isolator | 1× | 6 | — | part |
| 2 | Hemispherical Resonator Gyro | space-telescope-gyro | 2× | 2 | — | part |
| 3 | Star Tracker | space-telescope-star-tracker | 3× | 3 | — | part |
| 4 | Attitude Control Electronics 4 parts | space-telescope-acs-computer | 1× | 1 | 311 | assembly |
| 4.1 | Bare PCB | pcb-bare | 2× | 2 | — | part |
| 4.2 | Compute SoC Module | soc-module | 1× | 1 | — | part |
| 4.3 | SMD Passive (R/C/L) | smd-passives | 300× | 300 | — | part |
| 4.4 | Connector | connector | 8× | 8 | — | part |
Used in 1 assembly
Sourcing — likely vendors
Companies that make this · indicative price $0.50–$100 · MOQ & lead are typical| Vendor | HQ | Specialty | MOQ | Lead time |
|---|---|---|---|---|
| 🇨🇳Foxconn foxconn.com ↗ | Shenzhen, CN | Electronics contract mfg | 1,000 pcs | 6–10 wks |
| flex.com ↗ | Singapore | Electronics contract mfg | 1,000 pcs | 6–10 wks |
| dixoninfo.com ↗ | Noida, IN | Electronics contract mfg | 1,000 pcs | 6–10 wks |
| bydelectronic.com ↗ | Shenzhen, CN | Electronics contract mfg | 1,000 pcs | 6–10 wks |
| venture.com.sg ↗ | Singapore | Electronics contract mfg | 1,000 pcs | 6–10 wks |