umo mod: IRobertI's feeder on UMO v4.0

An adapter for IRobertI's feeder (UM2), to mount it on an UMO

3D printer parts and enhancements

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    inspired by:
    for use with:


    UPDATE (v4.0):
    for this version, which is even more silent than version 2.0, you only need 4 fan dampeners like those:


    UPDATE (v2.0):
    i updated the design and uploaded a new model with dampers (you need three dampers 15x15mm  - M4 and three screws PH2 M4x10mm), works pretty good so far ;). i also added a picture that compares the noise before the dampers where installed and afterwards, it doesn't look much but it is and it also is way more silent than the original feeder.
    i recommend a 1.2mm walls and infill around 25%, no support is needed since it is integrated at the model files (only true for damped version)


    Since the original version didn't fit for me, i redesgined the um2 feeder adapter for the um original.
    This one was a perfect fit at mine - it's also super rigid as you can see at the following video (printed with 0.8 shell, 30% infill, "support everywhere"!!!):


    I reach up to ~12mm³/s without any underextrusion (see picture above).

    update: since I now calibrated my feeder I reach now up to 18mm³/s , didn't tried more so far...

    The E-steps per mm for an Mk8 drigear should be around 365 as I read, since I am still waiting for my 400steps/rev. motor I cannot confirm that. At the original stepper it is much lower (but the original motor does not work for high quality prints - 1.8° steps are just too unprecise!).

    update: the stepper arrived and 340 works very fine for me! (see here for more information:

    update2: i was still extruding way too much! 302 is perfect now, to calibrate for the first time do the following:
    - pop the bowden tube out the hotend
    - preheat PLA (to activate the extruder motor)
    - extrude a bit until you can mark the filament at the bowden end
    - let it extrude 10mm
    - mark again and measure as accurate as you can
    - new E-steps = old E-steps * (10/measured mm)

    I also recommend some rubber washers between motor and the adapter to further minimize noise (it is very quiet compared to the original!). you can also use a selfmade silicone-damper as me:

    As an UMO-user you will not have an clamp for the feeder, I suggest that one:

    Materials and methods

    - 1x MK8 drive gear (ID 5mm)

    - 1x Stepper (NEMA 17, bipolar, 400steps/revolution (0.9°), around 44Ncm holding torque or more (e.g.: sparkfun's ROB-10846))

    - XH 4pol male connector (used at LiPo balancers), or the original cable (solder and use shrink tubes)

    - ball bearing from the original feeder

    - some screws and washers (normal, spring and rubber)


    for the damped version v3 you need additionally:

    - 3x 15x15mm M4 rubber buffers

    - 3x PH2 M4x10mm screws


    for the damped version v4 you need additionally:

    - 4x fan decoupling slics



    Issues are used to track todos, bugs or requests. To get started, you could create an issue.


    Mini gecko wallpaperEcologeek added this to the UMO upgrade collection ago
    06007b2e23efab58165d7ab5cf7f12f3?default=blank&size=40Tobiasz Zysk added this to the UMO collection ago
    6ba080ae05357ecaab0ec75264219a07?default=blank&size=40alnavasa added this to the Ultimaker parts collection ago
    96c2f4f604a3d3b0b968a9d52f46d57e?default=blank&size=40mbartell added this to the umo+ collection ago
    4193cd4c5caf0d0308f6049679a334a0?default=blank&size=40ballanux added this to the to make collection ago
    6de4f9d8348d785e5dbccd6a444c2086?default=blank&size=40patmik added this to the UMO stuff collection ago
    Bcbf3000397afde5dd1875cf5476e84b?default=blank&size=40wowowaa added this to the Ultimaker collection ago
    Bcbf3000397afde5dd1875cf5476e84b?default=blank&size=40wowowaa added this to the CTC Giant collection ago
    Mini foto alfredo materialised3d webMaterialised3D commented ago

    Thanks so much……….have a wonderful Day.

    2f03fcee8cbf966df2439e19c6f07641?default=blank&size=40Jochem77 commented ago
    Mini foto alfredo materialised3d webMaterialised3D commented ago

    Please, somebody can tell me, where is the complete model. Since I do not see the pieces that hold and push the filament, where the screw goes to adjust. Thank you very much.

    Mini ataraxis glow bigataraxis commented ago

    Thanks ;) Nice to hear that!

    Mini 636790 300Thomas Beck commented ago

    It's really really silent - used the newest version with the fan dumpers and can't hear anything from the feeder anymore. Thanks a lot for your effort and this design! Amazing!

    Mini 636790 300Thomas Beck added this to the UM Original updates collection ago
    55f3329613c4da5052af51fa3ce716b5?default=blank&size=40RickP added this to the Rick's Picks collection ago
    Mini rowiac avatarrowiac added this to the UMO Mods collection ago
    74637ddd9c05e8569750b756b7313729?default=blank&size=40Scherdin added this to the Ultimaker collection ago
    7af0d7bf9fd832018c1c303df4ac79e4?default=blank&size=40Giuseppe Talo' added this to the ultimaker collection ago
    2f03fcee8cbf966df2439e19c6f07641?default=blank&size=40Jochem77 commented ago

    Can you please show me (picture) how the fan dampeners are attached?

    E410067fb7b7156f22d058ab80f0ccca?default=blank&size=40Louis Rouanne added this to the UMO+ collection ago
    78612ea3a832602b202ae60d878d93d1?default=blank&size=40ockap added this to the UM2 details collection ago
    291cd18f042f65c496326608a5760345?default=blank&size=40johnfrank commented ago

    Thanks a lot! Although i havent tried yet to extrude filament.. I get filament grinding all the time.

    741d818be84363a6f5c443ce709db564?default=blank&size=40mSquared added this to the Ultimaker collection ago
    Mini ataraxis glow bigataraxis published this design ago