The EiBotBoard v.2.7 USB Motor Controller
The EiBotBoard ("EBB") is a USB-based dual stepper motor controller board that is useful for many general purpose robotics applications. Originally designed for the EggBot project, it was also used as the control board of the EggBot, AxiDraw and WaterColorBot, and can be used as a spare or replacement control board for those machines. It is also a popular control board for various other applications, including DIY pen plotters.
Aside: Please note that the EBB 2.7 is not compatible with the Bantam Tools NextDraw; contact support if you need to purchase a control board for your Bantam Tools NextDraw.
The EBB was designed by Brian Schmalz of Schmalz Haus LLC. It is an open source (in both hardware and software), PIC18F46J50-based motor controller board. Standard features include two Allegro A4983 16X microstepping motor drivers for bipolar steppers. It also has a separate onboard regulator to power up to two hobby servo motors. It is 2.2 x 2.2 inches square (5.6 x 5.6 cm). Works well with our 9 V 1.5 A power supply. Hardware documentation about EBB boards is available at schmalzhaus.com. EBB serial command documentation is available at github.
We are currently shipping version 2.7 of the EBB. Version 2.7 uses a standard USB micro connector and has a switch that by default turns off power to the pen-lift servo motor after one minute of inactivity. You can change the timeout duration or disable this feature using the serial command protocol.
Additional specifications:
- Motor driver ICs: Allegro A4983 (2)
- Stepper motor type: Bipolar (2)
- Step size: Full, 1/2, 1/4, 1/8, 1/16
- Motor connectors: Screw terminal
- USB jack type: Micro-B
- Power connector: Barrel Jack, 2.1 x 5.5 mm, center positive
- Voltage input range: 9 - 25 V DC
- Output current adjustment: 46 mA to 1.25 A per phase