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Ultmaker 2 extruder running backwards?


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Posted · Ultmaker 2 extruder running backwards?

lol.  You probably have the wrong firmware.  The UM2 and the UM2+ feeders run in opposite directions.  So you probably got the wrong firmware.  Also do a "factory reset" as sometimes when you downgrade or cross-grade the firmware it doesn't carry forward the eeprom values and a "factory reset" fixes this so that you have the correct directions for all the extruders.




Seriously consider getting the tinker firmware instead of the Ultimaker version.  The tinker version is much better with amazing features like the ability to reverse the feeder without installing different firmware and the ability to continue a failed print and much more.


Tinker marlin is here:



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Posted (edited) · Ultmaker 2 extruder running backwards?

You have probably flashed the wrong firmware, ie the firmware for the UM 2+ instead of the UM 2. Flash the proper firmware for your printertype and it should work correctly again.


edit: @gr5 beat me to it.

Edited by ahoeben
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Posted · Ultmaker 2 extruder running backwards?

I really appreciate your responses, but I'm still not getting this too work.


first I reset the unit to factory resets - still backwards


second I redownloaded and reloaded U2 firmware - still backwards


third As a test I downloaded U2+ to see if that reverses the extruder - still backwards


Fourth  I tried the marlin alternative firmware - still backwards


Fifth.....I don't know.  I'm getting the firmware from github....I assume that is the right location.


Any ideas are appreciated


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