Its compatible with prusa mk2.5 and mk3
the mk2.5 uses Mini Rambo [reprap.org]
There are several issues
1) hotend, Prusa had to get the hot end redesigned to be nice and smooth inside, so that filament change didn't suffer from jams. A clone hotend most likely will jam
2) Filament sensor, you need a filament sensor on your extruder, its parts of the operation of the MMU (yes there is a second one on the MMU)
3) firmware, Prusa firmware has custom code to operate the MMU, at this time it is only in Prusa firmware
electrically it is connected to rx2/tx2 and reset , so you need to be able to access a unused serial port on your controller and the reset line.
Atmel 2560 chips have 4 serial ports 0-3, 0 is connected to a usb/serial converter (ie the usb cable) on reprap controlers
1,2 and 3 are generally taken up as normal IO pins used in some other function.
the mk2.5 uses Mini Rambo [reprap.org]
There are several issues
1) hotend, Prusa had to get the hot end redesigned to be nice and smooth inside, so that filament change didn't suffer from jams. A clone hotend most likely will jam
2) Filament sensor, you need a filament sensor on your extruder, its parts of the operation of the MMU (yes there is a second one on the MMU)
3) firmware, Prusa firmware has custom code to operate the MMU, at this time it is only in Prusa firmware
electrically it is connected to rx2/tx2 and reset , so you need to be able to access a unused serial port on your controller and the reset line.
Atmel 2560 chips have 4 serial ports 0-3, 0 is connected to a usb/serial converter (ie the usb cable) on reprap controlers
1,2 and 3 are generally taken up as normal IO pins used in some other function.