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7. 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 --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