Ethersweep

An Open Source Ethernet controllable stepper motor. Easy interfacing with JSON and UDP from any device on the network in any language you choose.

What it does

Ethersweep offers easy interfacing from computers/machines/backends to motion control. Every UDP supporting language is able to communicate with it and is able to control as many motors (on your network) as you like.

It gets an IP address from a DHCP server and shows data like IP, operating voltage, button and operation states on the OLED display.

What it needs

Every motor has to be connected to an Ethernet network (optimally with DHCP) and a power supply between 5.5...30V.

How to control

Features:

• W5500 Ethernet controller
• AtMega328 Microcontroller (with Arduino Bootloader)
• Trinamic TMC2208 Stepper motor driver
• AS5600 magnetic rotary encoder
• XT30 power connector
• Oled 128x32 Display
• USB / ISP programmable
• Inputs for E-Stop and End-Stop
• Reset button
• Motor current setting via potentiometer
• Fits on a NEMA17 stepper motor

How to get started:

Build an (or multiple) Ethersweep controller. All manufacturing/assembly files work with JLCPCB and only some easy THT soldering + ICSP programming when the boards arrive. Arduino code is available in repository.

Connect your Ethersweep controller to your network via ethernet and connect to a 5.5...30V power source. Stick an encoder magnet (radial magnetized) on a NEMA17 motor shaft and connect the controller to the four M3 screws of the motor. Once connected to power and Ethernet, it serarches for an IP address using DHCP. When an IP is found, the controller shows it on the display and its ready to use. When no IP is found, it defaults to 192.168.1.111.

Now you can use the Python script to control the motor.

Using Python to control a stepper motor:

import socket
import json

IP_MOTOR = "192.168.1.185" #local motor controller IP
UDP_PORT = 1337


def drive_motor(steps, speed, direction, stepmode, motor_ip):
    json_data = json.dumps({'steps': steps, 'speed': speed, 'direction': direction, 'stepmode': stepmode})
    message = json_data.encode()
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    sock.sendto(message, (motor_ip, UDP_PORT))


drive_motor(100, 9500, 1, 32, IP_MOTOR)

Video:

Follow the project on hackaday.io: https://hackaday.io/project/187187-ethersweep

Upcoming Features:

• [x] automatic MAC address generation at first start + EEPROM storage
• [ ] USB interface
• [ ] improved Broadcast mode + motor synchronization for multiple motors
• [x] motor ramping mode
• [ ] motor servo mode
• [ ] (state) response to sender
• [ ] µC upgrade ?