Prusa Research MMU3 - User Manual

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Table of Contents
1. Introduction 7 .......................................................................................................................
Step 1 - MMU History and Printer Compatibility 8 ......................................................
Step 2 - Supported printers 9 ..........................................................................................
Step 3 - Disclaimer 9 ........................................................................................................
Step 4 - Tools required 10 ................................................................................................
Step 5 - View high resolution images 10 .......................................................................
Step 6 - Labels guide 11 ....................................................................................................
Step 7 - We are here for you! 11 .......................................................................................
Step 8 - Pro tip: inserting the nuts 12 .............................................................................
Step 9 - Printed parts 13 ...................................................................................................
Step 10 - Prepare your desk 14 ........................................................................................
Step 11 - Continue 14 .........................................................................................................
2. MMU2S Disassembly (UPG) 15 ....................................................................................
Step 1 - Introduction 16 .....................................................................................................
Step 2 - Tools necessary for this chapter 16 .................................................................
Step 3 - Disconnecting the PTFE tubes 17 ....................................................................
Step 4 - Disconnecting the MMU2S (part 1) 17 ............................................................
Step 5 - Disconnecting the MMU2S (part 2) 18 ...........................................................
Step 6 - Removing MMU2S from the printer 18 ..........................................................
Step 7 - MMU-to-Extruder PTFE tube disassembly 19 ...............................................
Step 8 - MMU2S Unit disassembly 20 ..........................................................................
Step 9 - Textile wrap removal 20 ....................................................................................
Step 10 - Idler motor removal 21 .....................................................................................
Step 11 - 5x16sh shafts removal 21 ..................................................................................
Step 12 - Bearings removal 22 .........................................................................................
Step 13 - Selector motor removal 22 ..............................................................................
Step 14 - Selector removal 23 ..........................................................................................
Step 15 - Pulley motor removal 23 ..................................................................................
Step 16 - Selector disassembly 24 ..................................................................................
Step 17 - Control board disassembly 24 ........................................................................
Step 18 - Summary 25 ......................................................................................................
3. MMU2S Buffer Disassembly (UPG) 26 .....................................................................
Step 1 - Preparation 27 ......................................................................................................
Step 2 - Disconnecting the PTFE tubes 27 ...................................................................
Step 3 - Buffer disassembly 28 .......................................................................................
Step 4 - Summary 28 ........................................................................................................
4. Idler Body Assembly 29 ...................................................................................................
Step 1 - Tools necessary for this chapter 30 .................................................................
Step 2 - Idler versions 30 ..................................................................................................
Step 3 - Idler parts preparation 31 ..................................................................................
Step 4 - Idler bearings assembly (part 1) 31 ..................................................................
Step 5 - Idler bearings assembly (part 2) 32 .................................................................
Step 6 - Idler center bearing assembly 32 ....................................................................
Step 7 - Coupler parts preparation 33 ...........................................................................
Step 8 - Coupler preparation 33 .....................................................................................
Step 9 - Coupler assembly 34 .........................................................................................
Step 10 - Final check 34 ...................................................................................................
Step 11 - Idler Body parts preparation 35 ......................................................................
Step 12 - Silicone stopper instalation 35 .......................................................................
Step 13 - Idler installation 36 ...........................................................................................

Summary

Introduction to MMU3

MMU History and Printer Compatibility

Overview of MMU versions and compatible printers.

Supported Printers

Lists officially supported printer models for MMU3.

Tools and Preparation Guide

Lists assembly tools and workspace preparation advice.

Printed Parts Guidelines

Details requirements for printing plastic parts for the MMU3.

MMU2 S Disassembly for Upgrade

Introduction and Necessary Tools

Outlines chapter goals and lists necessary tools for disassembly.

Disconnecting PTFE Tubes and MMU Unit

Guides on disconnecting PTFE tubes and the main MMU unit.

MMU2 S Unit Disassembly Process

Details steps for disassembling the MMU2S unit, removing key components.

MMU2 S Buffer Disassembly

Buffer Preparation and PTFE Tube Removal

Prepares the buffer and removes PTFE tubes.

Buffer Disassembly and Part Salvage

Completes buffer disassembly and summarizes salvaged parts.

Idler Body Assembly Guide

Tools and Idler Version Identification

Lists tools and identifies the correct Idler version for MMU3.

Idler Bearings and Coupler Assembly

Guides on assembling bearings and preparing the coupler.

Idler Body Final Assembly Steps

Details installing the idler motor, stopper, and shafts.

Selector Assembly Procedure

Tools and Parts for Selector Assembly

Lists tools and parts needed for the selector assembly.

Magnetic Ball and Trapeze Nut Installation

Guides on installing the magnetic ball and trapeze nut.

Rods, Cover, and Sensor Integration

Details assembling rods, cover, bushing tubes, and the FINDA sensor.

Pulley Body Assembly Steps

Tools and Pulley Body Part Prep

Lists tools and parts for the Pulley Body.

Bearings, PTFE Holder, and Collets Installation

Guides on inserting bearings, attaching PTFE holder, and installing collets.

Pulley Motor and Selector Installation

Details pulley motor and selector assembly, including alignment.

Electronics Board and Cable Management

Covers control board, PD-board, and cable management steps.

Cassette Buffer Assembly

Tools and Parts for Cassette Buffer

Lists tools and parts needed for the cassette buffer assembly.

Buffer Assembly and Plate Holders

Guides through buffer assembly, plate holders, and segments.

PTFE Tubes Installation for Buffer

Details preparing and installing the PTFE tubes for the buffer.

Spool Holder Assembly

Spoolholder Type Identification and Prep

Identifies spoolholder types and prepares vacuum-formed parts.

Vacuum-Formed Spoolholder Construction

Guides on assembling vacuum-formed spoolholders with rods and bearings.

Injection-Molded Spoolholder Assembly

Details assembling injection-molded spoolholders and joining guides.

MK3 S+ Extruder Modification Procedures

Printer Prep and Extruder Cable Handling

Prepares the printer and handles extruder cables before modification.

Extruder Disassembly and Component Swap

Guides on disassembling the extruder, removing fans, sensors, and PTFE tubes.

New Chimney and IR Sensor Installation

Details assembling the new extruder chimney and IR filament sensor.

Extruder Reassembly and Cable Securing

Guides on reassembling the extruder, fan, and managing cables.

MK3 S+ Setup and Calibration Guide

MMU Unit Attachment and Cable Routing

Guides attaching the MMU unit and routing its cable.

Electronics Wiring and Software Setup

Details connecting electronics, downloading software, and configuring PrusaSlicer.

Firmware Update and MMU Initialization

Guides flashing MMU and printer firmware and performing an MMU reset.

Filament Sensor Calibration Process

Crucial steps for calibrating IR and SuperFINDA filament sensors.

First Flight: MMU3 Operation

Filament Preparation and Loading Procedure

Guides on preparing filaments and loading them into the MMU.

Test Prints and Model Preparation

Details running test prints and preparing custom models.

Single Material Printing and Usage Tips

Explains single-material printing and offers usage tips.

Prusa Research MMU3 Specifications

General

Brand	Prusa Research
Model	MMU3
Category	3D Printers
Language	English