Brainwave is a low cost controller for Reprap 3D printers derived from the well known Sanguinololu. The primary design goal was lower cost, achieved by providing only the minimum required components for a single extruder printer. It can be used to drive a cartesian or delta style printer.
- Small footprint: only 60mm x 79mm!
- 12V power input
- Micro USB connector
- All connectors at edge of board, vertical or right-angle connectors will fit.
- Atmel AT90USB646 microcontroller w/ USB bootloader
- 1, 2, 16 or 32x microstepping @ up to 800mA
- Dual Z-axis connectors
- Optional per channel current attenuation
- Heated bed support with separate power input (up to 24V @ 15A)
- Integrated heater/thermistor/stepper connector for E channel
- Fan control
- Build, buy or borrow a Brainwave
- Install Arduino 1.0.2
- install the brainwave arduino hardware bundle from github.com/unrepentantgeek/brainwave-arduino into the Arduino hardware directory.
- Get Marlin. I am maintaining a branch of Marlin that will compile for brainwave at github.com/unrepentantgeek/Marlin Marlin HEAD has support, but it doesn't always compile cleanly for this board.
- Set micro-stepping selector jumpers (D1, D2) per channel as follows. Short both for 32x microstepping. Default: single-step.
- Set stepper current reference voltages. I = V / 2.55. Default: 1V == 400mA.
Step Mode D1 D2 Mode 0 0 Full 1 0 Half 0 1 16x 1 1 32x
- Open Arduino, find the Marlin directory and open Marlin.ino.
- Select 'Brainwave' from the Board menu. Find the Configuration.h file and change DEFAULT_AXIS_STEPS_PER_UNIT to suit your printer (remember, 32x microsteps!)
- Power on the Brainwave and connect the USB cable (note: the brainwave will not power up off USB, you need the 12V supply.)
- Hold down the PROGRAM button and press RESET, the STATUS led should pulse.
- Press the Upload button in Arduino.
- After a reset the brainwave will show up as a CDC ACM serial device (/dev/ttyACM[0..9] on Linux) and be ready to accept commands.
Brandon Bowman wrote up an excellent guide for getting the board working under Windows and MacOS: fabbersuw.blogspot.com/2012/12/if-your-brainwaves-got-no-brains-or.html
- It may take a couple of presses of the RESET button to get the firmware to come up after flashing.
- You may need a thermistor or similar 100k resistance present across the bed and extruder thermistor inputs. Otherwise Marlin may go into a deathloop and you'll never even see a serial device. Even if it doesn't fall on its face it will only sit and complain about too high temp.
= how to get it
- Julie Atwood
- Matt Westervelt
- Frederik Hubinette
- Silas Snider
- Johann Rocholl
- JP Sugarbroad
- Austin Appleby
- Richard DeLeon
- Plamena Milusheva
- Mark Ganter
- Brandon Bowman