UM2 printhead for UMO+, top and bottom part

A 90 degrees rotated UM2 printhead top which can be used for the UMO+. Dual extruder version.


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In order to use a UM2 printhead on a Ultimaker Original+ (UMO+), the top part of the printhead needs to be rotated 90 degrees. I designed a dual extruder version, based on the original part (see github, UM2, step files). 

Also included is a modified bottom part, which enables to use a thicker fan (10mm) and still guide cables through the printhead. I used a Sunon MC25100V2-000U-A99 fan which has a good airflow while being very silent. 

Works like a charm, see video

Materials and methods




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B1bdd12eb13152b4c559fb9c929bf259?default=blank&size=40fcristy28 added this to the Ultimaker UMO collection ago
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88591ba5e59422d49d1685ff57e09a20?default=blank&size=40tuttoflash added this to the Ultimaker collection ago
531235c7420172ceddd698df9b5da7fe?default=blank&size=40Stephen Brew added this to the UMO Stuff collection ago
7e414cf6ccc5867466a47b7b1cbee668?default=blank&size=40tiedexen1 added this to the UMOplus collection ago
Cc08ffa669f01f88c5864727d98fa191?default=blank&size=40nilrog added this to the Ultimaker extras collection ago
8f921f3c040c44b3226d53e1da3cf6bf?default=blank&size=40M.Schubert added this to the Ultimaker 2 collection ago
Ab14af86ccc672d5721fdabe10431604?default=blank&size=40Brian Daw added this to the printer tools collection ago
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Mini img 4905Marco3D commented ago


1) for the heater and sensor I did not adjust the firmware. Btw I replaced the UM2 nozzle block by an olson block with a 25 W heater, so you're situation could be different. If you notice a temperature overshoot during heating up, or during printing, you should perform an autotune of the PID values. That should be sufficient for the temperature control.

2) Note: there is also a dependency on the fans and the control board. The UM2 fans only work from a certain PWM value and need a kickstart. If you do not update the firmware it will only start spinning at full PWM (see for firmware). The heater fan in my case is on by default. However, depending on the version of your control board it is being switched on/off at a certain nozzle temperature. In that case you will probably need a custom firmware.

gr. Marco

Btw see for an excellent tutorial by neotko!

Mini profile text3D-protofab commented ago


did you change some firmware settings to get UM2 heater sensor and heater cartridge working in an espected range?


3Dprint fox

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