Quantity   Component name
1 × Arduino Mega 2560 The main hardware controller board
1 × Custom motor driver shield Made our own when the Adafruit motor shield v2 wasn't enough
1 × Electronic ink valve Automated continuous ink control
1 × Video card fan Used for cooling the Motor Shield
1 × 250W Computer PSU Supplies power to the plotter
2 × NEMA 17 Stepper Motors Bipolar 1.8 degree step angle
1 × 6v 13kg cm Servo Used for pen lift / pen drop mechanism
2 × DPDT Throw Switch Used to control main motor power and main ink power
1 × Black Arcade Button w/ microswitch Used to provide ink valve override control
1 × 8-Channel 5V Relay Module Controls ink valve and prevents blowing an Arduino IO (ink control)
1 × Pine frame Main construction frame
2 × DRV8825 Stepper Motor Driver The commonly used A4988 drivers weren't powerful enough!
1 × 1220mm x 2200mm Masonite board Main drawing bed for the plotter
2 × 2m Beaded chain Used to provide a pully-like system for the main print head
1 × 240mm x 6mm Round MDF Main center print head housing
3 × 6004-2RS Bearing Provides smooth radial movement and weight to the print head
2 × Lead counter weights Used to provide stability and apply constant pressure to the steppermotors
2 × Stepper motor cogs Custom 3D printed cogs coupled to the stepper motors that drive the beaded chain
1 × Various 3D printed parts for the main print head Pen holder, servo mount and other main print head parts