Chess Printer

A chess bot, but on steroids.

A completely custom-designed 3D printer control board with an ESP32 MCU. Designed to control a CoreXY printer, but can probably be adapted to any kinematic system.

Warning: This is an experimental project with no gurantees - use at your own risk and discretion!

Notable Features

• 6 stepper drivers (labelled X, Y, E0, Z1, Z2 & Z3)
  • Designed for TMC2209 drivers
  • 1-wire Serial communication with all drivers supported
• ATX & screw terminal power input
  • PS-ON control (standby & emergency kill poweroff supported in Marlin)
  • MCU can be powered from 5VSB ATX power rail with jumper selection (DO NOT power via USB and 5VSB concurrently - doing so will almost definitely damage something!)
• ESP32 MCU (DevKit-C footprint)
• I2S stepper stream
  • 2x daisy-chained 75HC595 shift registers
• I2C LCD
• 1 hotend & 1 heatbed thermistor input
• 1 high power MOSFET bed heater & 1 heatbed output (for external relay/SSR)
• 1 controllable & 1 always-on fan output