Space Issues

Version Differences

The single extruder build enables the S_CURVE_ACCELERATION feature due to extra available space.
The dual extruder build enables MARLIN_SMALL_BUILD to match feature parity with the single extruder build with exception to S_CURVE_ACCELERATION.

Features disabled/enabled to save space.

AUTOTEMP
SDCARD_READONLY
NO_SD_AUTOSTART
ARC_SUPPORT
NO_VOLUMETRICS
NO_WORKSPACE_OFFSETS

Fitting S_CURVE_ACCELERATION in the dual build.

Removing BABYSTEPPING entirely will allow S_CURVE_ACCELERATION to fit on dual extruder builds. However commenting out DOUBLECLICK_FOR_Z_BABYSTEPPING, BABYSTEP_DISPLAY_TOTAL, and CONFIGURE_FILAMENT_CHANGE will fit S_CURVE_ACCELERATION without entirely losing BABYSTEPPING.

Flashing

USB Flashing

MakerBot's Mightyboard Rev E’s are missing capacitor c20. This prevents the board from self resetting to flash over USB. You can try to time pressing the reset button with uploading firmware. I have only ever accomplished this once.

ICSP Flashing

I find it much easier to flash over the ICSP header using an Arduino and AVR Dude. Adjust settings as necessary such as the port or if you are using a different device to flash. Feel free to reach out to the author of this config in Discord for help.
avrdude -v -patmega1280 -cstk500v1 -PCOM4 -b19200 -U flash:w:firmware.hex

Printer Information

Primary Extruder (Dual)

The right nozzle is Extruder 1 (E0) on this printer which will often be confusing as it will be the left temperature on the screen. There are a couple of ways to change this, you can pin swap the pins file. Don’t forget to invert the motor direction. It is possible but not as easy to edit the display order instead.

Motor Current

The FlashForge Creator Pro example sets current a little higher at .84 for XY&E and .4 for Z. I have matched the MakerBot values from beta.ivc.no of .81 except for Z rounding from .278 to .28. The Z motor will whine more at higher current.

Modifications

Part Cooling Fan

If you have added a part cooling fan to the extra mosfet you need to uncomment #define NUM_M106_FANS
#define NUM_M106_FANS 1

You will also need to set the pin definition. This can actually be inserted right below the line you just uncommented.
#define FAN0_PIN MOSFET_F_PIN

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