Bare Bones ESP32 Gear Hobbing Controller

This quick and dirty controller is designed for an esp32 devkit v4 board (az_delivery) using an optical encoder and an external stepper or servo controller.

This requires minium of 4 pins for step, dir, encoder_a, encoder_b signals. This is the simplest and most basic controller and it may have bugs. Use at your own risk. PR's and questions (via issues) welcome.

Configuration:

The main.cpp file contains most of the configuration The items below need to be updated in the file.

int motor_steps = 200;
int microstepping = 8;
int reduction = 40;  // This is the indexer gear reduction 
int hob_encoder_resolution = 2400;
bool dir = 1; // this controls the motor direction
int led = 25; // the LED pin 

#define dirPinStepper 12
#define enablePinStepper 26
#define stepPinStepper 13
int stepper_speed = 150000;

Encoder.cpp requires the A and B encoder pins as well as the pulses per revolution. PPR is the 3rd argument of the initializer for the Encoder class.

int EA = 17;
int EB = 16;

Encoder encoder = Encoder(EA, EB, 600);

Running:

To configure the tooth count connect to serial and paste teeth=N where N is the number of teeth for the gear.

Board

Schematic

PCB