2.7 KiB
2.7 KiB
Bill of Materials (BOM)
Mechanics
| Name | Qty | Description | Comments | Suggested link | Image |
|---|---|---|---|---|---|
| Steel ball | 12 | Ø1.25 mm (0.05") | Precision G10 or better. Can be sourced from small ball bearings | ||
| PU stretch cord | 1 m | Ø1mm | e.g. "Stretch Magic" or "Magic String" | Aliexpress |  |
| Neodym Cylinder Magnet | 70 | Ø3mm h=5 mm | N52 Grade | NeoMagnets | |
| Brass Pipe | 1 m | OD=Ø2mm ID=Ø1 mm | Amazon |  |
|
| M2 Screw | 12 | M2×12 mm, Countersunk | |||
| M3 Grub Screw | 6 | M3×4 |
Electronics
| Name | Qty | Description | Comments | Suggested link | Image |
|---|---|---|---|---|---|
| DC-DC Step Down Module | 1 | 4.75–23 V Step-Down Buck Converter | Aliexpress |  |
|
| (1N5819) OR (PMEG4010) | 1 | Diode (through-hole or SMD) | |||
| Raspberry Pi Pico 2 | 1 | Microcontroller board |  |
||
| MT6835 Magnetic Encoder Module | 3 | Magnetic encoder | Aliexpress |  |
|
| TB6612FNG Driver | 3 | Aliexpress |  |
||
| 470 µF Electrolytic Capacitor | 3 | > 100 µF | anything > 100µF will work well | ||
| 10 µF Ceramic Capacitor 0603 | 3 | Optional | |||
| 4.7 k Resistor 0603 | 2 | Optional | |||
| 2 Pin Power Header | 1 | 7.5 mm pitch | |||
| 4 Pin Header | 4 | 2.5 mm pitch | |||
| 8 Pin Header | 1 | 2.0 mm pitch | |||
| NEMA 17 Stepper Motor | 3 | Body ≤ 38 mm | Body length <= 38mm |
3D Printing
| Name | Qty | Description | Comments | Image |
|---|---|---|---|---|
| Motor Horn | 3 | 0.4 mm+ nozzle may require post-processing |  |
|
| RubberBandCollet | 12 | 0.4 mm nozzle, 0.1mm Layer height + may require post-processing |  |
|
| BallJointMount | 6 | 0.4 mm nozzle, 0.1mm Layer height + may require post-processing |  |
|
| Motor Mount | 3 |  |
||
| End Effector | 1 |  |
||
| Base Block | 1 |  |