Prusa Research i3 MK3S+ User Manual

1
Table of Contents
1. Introduction 7 .......................................................................................................................
Step 1 - All the required tools are included 8 ................................................................
Step 2 - Labels guide 8 .....................................................................................................
Step 3 - Use labels for reference 8 .................................................................................
Step 4 - Spare bag 9 .........................................................................................................
Step 5 - View high resolution images 9 ........................................................................
Step 6 - Printed parts - versioning 10 .............................................................................
Step 7 - We are here for you! 10 ......................................................................................
Step 8 - Pro tip: inserting the nuts 11 .............................................................................
Step 9 - Important: Electronics protection 11 ...............................................................
Step 10 - Reward yourself 12 ...........................................................................................
Step 11 - How to successfully finish the assembly 13 ..................................................
2. Y-axis assembly 15 ............................................................................................................
Step 1 - Tools necessary for this chapter 16 ..................................................................
Step 2 - YZ frame - preparing the components 16 ......................................................
Step 3 - YZ frame - mounting the longer extrusions 16 ..............................................
Step 4 - YZ frame - mounting the shorter extrusions 17 .............................................
Step 5 - YZ frame - final check 17 ...................................................................................
Step 6 - Y-axis: front and rear plate preparation 18 .....................................................
Step 7 - Y-axis: front plate assembly 18 .........................................................................
Step 8 - Y-axis: preparation for the PSU 19 ..................................................................
Step 9 - Y-axis: rear plate assembly 19 ..........................................................................
Step 10 - Y-axis: geometry check 20 ..............................................................................
Step 11 - Mounting antivibration feet (optional) 20 .....................................................
Step 12 - Preparing Y-belt-idler (part 1) 21 ....................................................................
Step 13 - Preparing Y-belt-idler (part 2) 21 ...................................................................
Step 14 - Preparing Y-belt-idler (part 3) 22 ...................................................................
Step 15 - Mounting the Y-belt-idler 22 ..........................................................................
Step 16 - Y-axis: motor and motor holder 23 ................................................................
Step 17 - Preparing Y-motor-holder 23 ..........................................................................
Step 18 - Mounting Y-motor-holder 24 ..........................................................................
Step 19 - Y-axis: Y-carriage 24 ........................................................................................
Step 20 - Correct bearing orientation 25 ......................................................................
Step 21 - Installing bearings on the Y-carriage 25 .......................................................
Step 22 - Inserting smooth rods into Y-carriage 26 ....................................................
Step 23 - Y-axis: smooth rods holders 26 .....................................................................
Step 24 - Preparing Y-rod-holder 27 ..............................................................................
Step 25 - Mounting the Y-rod-holder parts 27 .............................................................
Step 26 - Installing the Y-carriage 28 ............................................................................
Step 27 - Aligning the smooth rods 28 ..........................................................................
Step 28 - Assembling the Y-motor pulley 29 ...............................................................
Step 29 - Y-axis: Assembling the belt 29 ......................................................................
Step 30 - Y-axis: Assembling the belt 30 ......................................................................
Step 31 - Y-axis: Assembling the belt 30 .......................................................................
Step 32 - Y-axis: Assembling the belt 31 .......................................................................
Step 33 - Y-axis: Assembling the belt 31 .......................................................................
Step 34 - Y-axis: Assembling the belt 32 ......................................................................
Step 35 - Aligning the Y-axis belt 32 .............................................................................
Step 36 - Tensioning the Y-axis belt 33 ........................................................................
Step 37 - Testing the Y-axis belt 33 ...............................................................................

Prusa Research i3 MK3S+ Specifications

General

Brand	Prusa Research
Model	i3 MK3S+
Category	3D Printers
Language	English

Summary

Introduction to Printer Assembly

Tools and Initial Setup

Identifies required tools and explains label usage for parts organization.

Assembly Guidelines and Tips

Provides essential advice for successful assembly, including handling electronics and rewarding progress.

Y-axis Assembly

YZ Frame Construction

Assembling the main YZ frame structure by mounting extrusions and checking geometry.

Y-Belt Idler and Motor Mount

Preparing and mounting the Y-belt idler and the Y-axis motor holder.

Y-Carriage and Rod Installation

Installing linear bearings and smooth rods onto the Y-carriage.

Y-Axis Belt Assembly and Tensioning

Assembling and tensioning the Y-axis belt for proper movement.

X-axis Assembly

X-Axis Frame and Bearings Setup

Assembling X-axis ends, inserting linear bearings, and preparing smooth rods.

Motor Pulley and X-Axis Motor Mount

Assembling the motor pulley and mounting the X-axis motor.

Z-axis Assembly

Motor Holders and Screw Covers

Assembling Z-axis motor holders and placing Z-screw covers.

Trapezoidal Nuts and Rods Integration

Installing trapezoidal nuts and smooth rods for Z-axis movement.

E-axis (Extruder) Assembly

Extruder Core and Gear Assembly

Assembling the extruder body, lever, steel ball, and Bondtech gears.

Hotend and Fan Integration

Mounting the hotend, extruder fan, IR sensor, and related components.

X-Axis Belt and Cable Management

Installing the X-axis belt and organizing all printer cables.

LCD Assembly

LCD Preparation and Mounting

Preparing LCD parts, checking cables, and assembling supports.

Final LCD Assembly and Knob

Assembling the LCD cover, controller, and attaching the control knob.

Heatbed & PSU Assembly

Heatbed Cable and Cover Setup

Connecting power cables to the heatbed and securing its cable cover.

PSU Mounting and Power Connections

Mounting the power supply unit and connecting power cables correctly.

Electronics Assembly

Einsy-Door and Base Preparation

Preparing and mounting the Einsy-door, hinges, and the main Einsy-base.

Comprehensive Cable Management

Organizing and securing all printer cables using zip ties and channels.

PSU Cover and Final Power Checks

Securing the PSU cover and performing final checks on power cable connections.

Preflight Check

SuperPINDA Sensor Adjustment

Adjusting the SuperPINDA sensor height relative to the nozzle.

Printing Preparation and Resources

Guides for first prints, handbooks, knowledge base, and community resources.