TeensyPrinter
WORK IN PROGRESS
This is a RAMPS-like 3D printer control board that uses a Teensy 3.6 as its controller, instead of the more usual Arduino Mega or other options. Right now, I've planned out the following capabilities:
- three motor controller sockets for X/Y/Z
- three motor conrtoller sockets for up to three extruders
- jumper-selectable SPI and soft-endstop wiring for TMC2130 drivers
- min/max endstop inputs on all three axes
- thermistor inputs for bed, up to 3 extruders, and enclosure
- heater outputs for bed and up to 3 extruders
- part-cooling fan output
- built-in connection for a graphical LCD with encoder knob and SD slot
- two servo outputs
- one uncommitted analog input
- three uncommitted digital I/O lines, two with PWM
This uses up all available I/O on the Teensy 3.6. The uncommitted analog input would be usable for a filament-width sensor, while the uncommitted digital I/O could be used for power-supply control, a filament-runout sensor, or solenoid control (with some external electronics). If you only need X/Y/Z-min endstop inputs, the X/Y/Z-max inputs could also be used for additional digital I/O lines.