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Mihail Dimitras

Backward filament feed

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The UM2 and the UM2+ have reverse direction feeders.  You got the wrong software.  If you have a white feeder on your UM2 then use the "plus" firmware.  If you have a black feeder on your UM2 then don't use the "plus" firmware.  Just regular UM2 extended.

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I forgot to mention you want to do a FACTORY RESET on the menu.  Some of those things (like steps/mm for the E axis) are stored in the eeprom area and different versions of the firmware (marlin) store it in different places so it's best to do a FACTORY RESET after installing firmware unless it was definitely 100% an increase in version from one UM official release to another official release.

 

For example if you switch to tinkerMarlin or from tinkerMarlin you definitely want to do a FACTORY RESET.

 

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