Klipper Toolboard
A very small 3D printer board for use on a toolhead.
Features:
- TMC2209 driver
- STM32F042C6T6
- Two MOSFET drivers fans
- One bigger MOSFET driver for a hotend heater
- Thermistor input
- One endstop
- CAN bus
Main power is 12-24V
The CAN Bus is not terminated, instead it uses 4 wires, termination should be done at other end.
It uses an external 5V switch regulator.
All done in KiCad
Possible issues:
- Is the cooling for the TMC2209 adequate?
Change ideas:
Is the endstop useful? Better with a servo output?
Use an STM32F103 instead? Pinout is the same. F042 has klipper CAN support. Porting the klipper code to F103 should not be that hard.