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Ultigcode on UMO

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I was wondering why the Ultigcode flavor is not supported on the UMO?

What else does it do aside from having its own start and end print section for the UM2 and the filament diameter on the printer controller?

Isn't it just a firmware thing on the printer side?


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Isn't it just a firmware thing on the printer side?



It *could* be implemented. The UMO would have to have an interface to allow you to set 3 things:

filament diameter

retraction distance

retraction amount

The changes in gcode for ultigcode are that retraction (and un-retraction) is done with G10,G11 commands instead of moving extruder axis. The other change is that extruder position in regular gcode is mm of filament at the feeder and in ultigcode it is in cubic mm.

You need to know the filament diameter to convert between these two units.

The code to handle ultigcode is already in a version of Marlin but I don't know if it will (or has already) made it's way into the "standard" ErikZalm version of Marlin. Although Erik works for Ultimaker now (started a few months ago I think).


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An alternative is to select 'RepRap volumetric' flavor in Cura and use standard Marlin with FWRETRACT enabled. Then you can set the retraction settings on your Ulticontrolle quite similar as in the menu of the UM2 and the GCODE also uses G10 and G11. This is implemented in the 'standard' version for quite some time now. And it works like a charm... ;)


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I made and submitted updates to Marlin to save/restore retract and filament diameter settings. I also added a menu to the display to turn on/off volumetric mode and set filament sizes.

Hopefully it will be in the next release of Marlin.



PS: If you are a developer and speak a language other than English, please find and update these values in the language_XX.h file:

#define MSG_VOLUMETRIC "Filament"


#define MSG_FILAMENT_SIZE_EXTRUDER_0 "Fil. Dia. 1"

#define MSG_FILAMENT_SIZE_EXTRUDER_1 "Fil. Dia. 2"

#define MSG_FILAMENT_SIZE_EXTRUDER_2 "Fil. Dia. 3"


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Did this died into vacuum? Just wondering, because an update for umo+ firmwares could be really welcome to allow ultimaker gcode flavor.

Maybe a reduced flavor that could control filament/heat/retracttion on the machine and leave the homming/start as default?

Wondering if umo+ firmware will ever get a boost or it will only advance with the @amedee work upgrading it.

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