This board converts encoder movement to stepper motor rotation.
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If you want to use any mechanical rotation in order to drive a stepper motor this board is for you. We needed this board for converting our industrial CNC machine to a 3D Printer. The mechanical huge 4th axis needs to be used as filament driver. We did not want to touch the complex and expansive CNC circuits. What we did here is just connect a the shaft of the quadrature rotary encoder to the 4th axis chuck. With this board we used standard 3d printer extruders with our industrial CNC.
The board has one DRV8825 stepper driver and an Atmega328P chip connected. You can think this board as one arduino with a built in stepper motor driver capability. I am sure people will find other possible usage for this board.
VCC : Positive 5 volt DC for encoder
GND : Ground for encoder
CHA : Encoder Channel A signal
CHB : Encoder Channel B signal
DIR : DIR signal from the microcontroller if you like to use a bigger stepper motor driver other then the one on board.
STEP: Step signal from the microcontroller if you like to use a bigger stepper motor driver other then the one on board.
VDD : Positive 12-24 Volt DC for Motor driver
GND : Ground for motor power
1B,1A,2A,2B : Stepper motor coil connections
You can find the source files including the firmware at MakerStorage Github Repo