7. BOM and Files
1. BOM
| Type | Item | Quantity | Note | Souce | Cost |
|---|---|---|---|---|---|
| Control | Raspberry Pi Pico (Microcontroller) | 1 | Main controller | Akiduki | ¥770 |
| A4988 Stepper Motor Driver | 4 | One per motor | Amazon JP | ¥999 (5 peces) | |
| Input | Limit Switch | 3 | For endstop detection (X/Y/Z) | Amazon JP | ¥399 (20 pieces) |
| Output | NEMA17 Stepper Motor (17HS4401) | 4 | For mecanum wheels | AliExpress | ¥5267 (5 pieces) |
| 180° Servo Motor | 1 | For pen plotting | Akiduki | ¥600 | |
| Power | Stabilized 12V 10A Power Supply (120W) | 1 | High current power supply for motors and controller | Amazon JP | ¥2391 |
| 2.1mm DC Plug Connector | 1 | For connecting power adapter to the PCB | Akiduki | ¥40 | |
| DC Locker Switch | 1 | On/off control for power | Amazon JP | ¥699 (10 pieces) | |
| Heat-Resistant AC Power Cable (125V 12A, 2m) | 1 | From electrical outlet to stabilized power supply | Amazon JP | ¥527 | |
| DC Power Pigtail Cable Male Connector (2.1mm x 5.5mm) | 1 | From stabilized power supply to DC cable | Amazon JP | ¥799 | |
| DC Extension Cable (5.5x2.1mm, 18AWG, 5m) | 1 | High current DC extension (12A) | Amazon JP | ¥949 | |
| Passive Component | 35V 220µF Electrolytic Capacitor | 4 | To stabilize power to each A4988 driver | Amazon JP | ¥499 (20 pieces) |
| Connectivity | 1x20 Pin socket | 2 | For connecting Pi Pico to the PCB | Male/Female Pin Header Set: AliExpress | ¥251 (5 pieces) |
| 1x4 Pin socket / Pin header SMT | 4 | For 4 motors | (Above) | ||
| 1x10 Pin Headers | 1 | For 3 limit switches and 1 servo motor | (Above) | ||
| 4-Pin JST XH2.54 Cables | 4 | To connect stepper motors to the PCB | (Included in Nema17) | ||
| USB Type-C to Micro USB Cable (2m) | 1 | For connecting to Pi Pico | Amazon | ¥639 | |
| DC Power Pigtail Cable (2.1x5.5mm, 2m, 10A) | 1 | For power connections (DC plug to wire) | Amazon JP | ¥749 | |
| Structure | Acrylic board A4 (210x297mm), Tchickness 5mm | 1 | For frame | Amazon JP | ¥1390 |
| PETG fillament | 132 g | BambuLab | - | ||
| Fixture | M2 bolt 16mm | 6 | 2 for servo motor, 4 for 2 limit switches | ||
| M2 nut | 2 | For servo motor | |||
| M3 hex socket bolt 16mm | 24 | 16 for Stepper motor installation, 8 for mecanum wheel coupler | M3 x 4, 5, 6, 8, 10, 12, 16, 20, 25 Amazon JP | ¥1399 (280 pieces) | |
| M3 hex socket bolt 8mm | 16 | Stepper motor installation, mecanum wheel coupler | |||
| M3 nut | 4 | inserted mecanum wheel coupler | |||
| M5 hex socket bolt 12mm | 6 | 2 for PCB board and enclosure, 2 for servo motor bracket | |||
| M5 nut | 6 | 2 for PCB board and enclosure, 2 for servo motor bracket | |||
| Total | ¥17,868 |
2. Files
A. Assembled Fusion file
B. 3D print and lasercut data
C. PCB
*This PCB design contains errors that were worked around in post processing.
- Traces: FP_final_traces_4.png
- Logo: P_final_logo_2.png
- Mill holes: FP_final_holes.png
- Outline: FP_final_milloutline.png
