[FEATURE REQUEST] Prusa mini+ MMU 3 support

[Niflheim123]

Printer model

Mini+

Describe the feature

Hello, I would like to use the MMU 3 with the Prusa Mini+. Bamboo lab a1 mini has this feature with their AMS system. If the form factor is an issue maybe add a different 3d design to it.

Expected functionality

MMU 3 multi material usage.

[danopernis]

This looks like a fairly complicated project. It may be feasible, but certainly not easy to implement. Possible challenges I see straight away:

• limited FLASH space, STM32F407VG only has 1MB of FLASH and we are at the limit
• not enough peripherals; you could possible remove Wi-Fi module and reuse the serial line to control MMU
• power source, MMU requires 24V
• hardware changes to extruder
• all the other stuff I don't see straight away 🙂

References:

• BUDDY schematics
• MMU schematics

I would love to see somebody make this work. It would involve hacking a lot of #ifdefs, making adjustments to electronics and also figuring out the hardware.