Arduino configuration for Megatronics

• Download and install Arduino 1.6.8
• Add megatronics board to the boards.txt

vi /Applications/Arduino.app/Contents/Java/hardware/arduino/avr/boards.txt

megatronics.name=Megatronics
megatronics.upload.protocol=wiring
megatronics.upload.maximum_size=258048
megatronics.upload.speed=115200
megatronics.upload.tool=avrdude
megatronics.bootloader.low_fuses=0xFF
megatronics.bootloader.high_fuses=0xDA
megatronics.bootloader.extended_fuses=0xF5
megatronics.bootloader.file=stk500v2/stk500boot_v2_mega2560.hex
megatronics.bootloader.unlock_bits=0x3F
megatronics.bootloader.lock_bits=0x0F
megatronics.build.mcu=atmega2560
megatronics.build.f_cpu=16000000L
megatronics.build.core=arduino
megatronics.build.variant=mega
megatronics.build.board=AVR_MEGA2560

• Start the Arduino.app and select the board and serial port:
  • Tools -> Board -> Megatronics
  • Tools -> Port -> /dev/cu.usbserial.A702WH5Z
• Download and unzip latest megatronics firmware (Currently "Megatronics_Marlin_05052015.zip")
• In Arduino, open Megatronics_Marlin_05052015/Marlin/Marlin.ino
• Modify Configuration.h (only modified values are shown)

  #define STRING_CONFIG_H_AUTHOR "(jorg, owobi_bot)" // Who made the changes.
  #define TEMP_SENSOR_0 5
  #define HEATER_0_MAXTEMP 300
  #define  DEFAULT_Kp 21.79
  #define  DEFAULT_Ki 2.38
  #define  DEFAULT_Kd 49.99
  #define PIDTEMPBED
  #define  DEFAULT_bedKp 85.56
  #define  DEFAULT_bedKi 7.50
  #define  DEFAULT_bedKd 243.91
  #define EXTRUDE_MINTEMP 150
  const bool X_MIN_ENDSTOP_INVERTING = false; // set to true to invert the logic of the endstop.
  const bool Y_MIN_ENDSTOP_INVERTING = false; // set to true to invert the logic of the endstop.
  const bool Z_MIN_ENDSTOP_INVERTING = false; // set to true to invert the logic of the endstop.
  #define INVERT_X_DIR true
  #define INVERT_Y_DIR true
  #define X_MAX_POS 190
  #define Y_MAX_POS 190
  #define Z_MAX_POS 290
  #define HOMING_FEEDRATE {50*60, 50*60, 10*60, 0}  // set the homing speeds (mm/min)
  #define DEFAULT_AXIS_STEPS_PER_UNIT   {80, 80, 400, 521}  // default steps per unit for Ultimaker
  #define DEFAULT_MAX_FEEDRATE          {1000, 1000, 50, 25}  // (mm/sec)
  Modify Configuration_adv.h (only modified values are shown)
  #define EXTRUDER_0_AUTO_FAN_PIN 7
  #define EXTRUDER_AUTO_FAN_SPEED   180  // == full speed
  

Upload the new firmware to the megatronics v3.0