Low Rider MMU V2.0 - for any Klipper printer
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This is a Multimaterial Unit for any 3D printer running Klipper
- Ocena
- 5 / 5
- Polubienia
- 472
- Pobrania
- 1300
- Wydruki
- 10
- Wyświetlenia
- 10 843
- Oceny
- 6
Aktualizacja u źródła:
Informacje o modelu
- Źródło
- Printables
- Kategoria
- Other Printer Parts & Upgrades
- Licencja
- Creative Commons — Attribution — Noncommercial
Welcome to the Low Rider MMU V2.0
###### Please post your Makes ######
Please like this, download and post the make if you built it
It helps us makers with feedback and gets us some Prusa meters as most people don't pay it forwardFeel free to help my projects continue https://ko-fi.com/gcodegearhead
############################################################################ Intro ###########################################################################
My project aims to build on the ideas of previous MMU's and contribute to the open source community.
This is designed to be a simple relatively low cost MMU which has less moving parts to align and tinker with. The idea is it can be mounted to the side of a printer or underneath a filament rack etc. and take up minimal space. The fact that it looks interesting, like its thinking, when in operation is also good reason to keep it out on display.
Special mention to AmfKuna who contributed to improving the double shear servo gear as well as great mods to the lever arms.
Special mention to finncois who has contributed to a large amount of manual updates and assembly verification.
############################################################################ Update Log###########################################################################
Date | Info |
23-MAY-2025 | New Channel in the Happy Hare Discord, find me here! - My Channel |
20-APR-2026 | Feed body heat set holes corrected, apologies |
19-APR-2026 | Manual updated to V4 |
14-APR-2026 | Update to the CAM shaft to reverse he rotation and not go through all gates when starting up. Assembly is the same. Print the CAM labelled |
09-APR-2026 | I have added a feeder body with adjustable limit switch as it might be useful to some. You will need
Cut away the sacrificial layer to route the ground wire in the channel.  |
03-APR-2026 | Found an issue in latest Happy Hare with filament being marked as unavailable after gate check. Please always check the Happy Hare Discord for latest updates. |
02-APR-2026 | After some use I found the tolerance stack up to result in Lane 0 gripping both Lane 0 and Lane 1 with the 623zz bearing levers. |
18-MAR-2026 | Added new 623ZZ Bearing Lever Arm to address issue of gears disengaging and then making a loud noise when re-engaging.  Updated 4 Lane Board Mount see Beta Folder |
05-MAR-2026 | Added white background Manual for printing |
27-FEB-2026 | Corrected Servo Belt length to 144mm. |
24-FEB-2026 | Updated bearing type in manual (BOM not affected). |
22-FEB-2026 | Corrected Motor Plate, please download again if you downloaded before this date. |
18-FEB-2026 | Testing ERB V2.0 Board Mount by Marc. Beta Model available below for early adopters (See beta Folder) |
Testing lever arm with smooth idler by AmfKuna Beta Model available below for early adopters (See beta Folder) | |
12-FEB-2026 | Added 5,4,3 Lane CAMs, (angles are the same minus the missing ears) |
11-FEB-2026 | Updated Manual |
08-FEB-2026 | Initial Release |
############################################################################ Assembly Instructions###########################################################################
The Assembly Video Can be found here
Download the Manuals supplied below.
I assume you know how to flash an EBB board, if not follow the linked wiki pages in the manual.
This is intended to give you a starting point, it is by no means comprehensive.
You will need to tune your purge volumes, change to a blobifier, etc etc.
This is to help you get going and lower the barrier to entry to MMU units.
This is a DIY project with multiple interfacing parts which move in close proximity to each other.
The quality of this project is strongly dependent on the accuracy of your printer, quality of your prints, and how well you pay attention to the details.############################################################################ Print Settings###########################################################################
Print all parts except for the levers as orientated, settings are in the manual
Orient the levers flat side down in the slicer
I have left a filled in version of the number in the lever for multi colour prints.
If you don't want it, split the lever to objects and delete the number body
############################################################################ BOM###########################################################################
Parts | Qty | Link or info |
|---|---|---|
EBB42 V1.2 (no Max31865) | 1 | Use the No-Max version |
LM2596 DCDC Buck | 1 |
|
Neo Pixel LEDS GRBW | 6 | Use amount required for your configuration choice |
MG996r Servo | 1 |
|
Nema 17 Stepper Motor | 1 |
|
Heat Set Inserts M3 OD5 L5mm | 19 |
|
Heat Set Inserts M5 OD7 L6mm | 1 | |
0.2mm2 / 26AWG wire | As Required |
|
Small Zipties | As Required | (approx. 5) |
Limit Switches D2FC NO+NC | 6 | Use amount required for your configuration choice. Use the exact switch type, or tolerances will be off https://www.amazon.de/DAOKAI-Switch-Straight-Moment-Arduino/dp/B09WVMRD5V |
Solder | As Required |
|
M5 x 14mm | 1 |
|
M3 x 30mm | 4 |
|
M3 x 8mm | 9 |
|
M3 x 6mm | 4 |
|
M3 x 4mm | 4 |
|
M3 Nuts | 6 | Or use 3x M3 lock nuts |
M3 Washers | 7 |
|
M2 x 10mm | 12 |
|
GT2 Belt 6mm x 186 | 1 | Closed loop for stepper [188 will also work] |
GT2 Belt 6mm x 146 | 1 | Closed loop for servo |
GT2 20 tooth pulley 5mm OD | 2 |
|
Bearing F695 | 3 | |
Bearing 685 | 3 | |
Bearing 623zz | 6 | Lever Arm Bearing Mod |
BMG Dual Extruder Gear sets | 6 | |
OD 3mm Shaft L=160mm | 1 |
|
OD 5mm Shaft L=180mm | 2 |
|
M3 threaded Rod L=160mm | 3 |
|
ECAS04 | 12 | Use amount required for your configuration choice |
6x3 N35 Magnets | 12 | Use amount required for your configuration choice |
5mm Steel Balls | 6 | Use amount required for your configuration choice |
PTFE Tubing OD=4mm ID=3mm L=20mm | 6 | For levers Use amount required for your configuration choice |
PTFE Tubing OD=4mm ID=3mm | As required | Routing from spool holder to MMU and MMU to printer |
BETA Mods | ||
623ZZ Bearing | 6 | Lever arm bearings |