E3D Tool Changer Assembly
E3D Tool Changer Assembly at Midwest RepRap Festival

So you’re looking for the CAD download files…… Well E3D has finally released the files. You can find the files at their Github. https://github.com/e3donline/ToolChanger

E3D ToolChanger Assembled

E3D Tool Changer CAD Assembled
E3D ToolChanger CAD

The E3D tool changer files are published on github but if you’re looking for the assembled files or toolchanger assembly check out EJaworenko on Thingiverse here.

“E3D released their ToolChanger printer design to be open source! Exciting times. I went through the process of assembling the entire printer as a way of studying what they did and why they did certain things while designing a printer based off of it.” -EJaworenko

  • Iges
  • Step
  • Fusion 360 F3Z files
  • DXF

E3D ToolChanger Enclosure

E3D Tool Changer CAD Files 21
E3D Tool Changer Enclosure

Gregory Holloway published the enclosure design on Thingiverse along with many other E3D Toolchanger files such as the ASMBL Subtractive Tool. Greg’s laser-cut acrylic enclosure design is for the ASMBL Subtractive Tool. Check out Gregory’s Thingiverse here.

E3D ToolChanger Clones

While E3D has been perfecting their motion system and toolchanger design it take long for the clever engineering detectives that make up the Reprap community to reverse engineer the motion shystem. Makers have been developing tool changing techniques before E3D changed the game with their new machine. The concept has been presented in many ways but since the E3D MRRF 2019 presentation many inspired designs and clones have appeared. The best one that I have seen is by a Thingiverse User: TPRA.

E3D Tool Changer CAD Files
e3d tool changer clone design open source

TPRA’s FunX4 Toolchanging 3D Printer https://www.thingiverse.com/thing:3552566

e3d tool changer clone design open source thingiverse
E3d Tool Changer Clone Design Open Source

First tests here :

Still work in progress :

I’m releasing this now even if not definitive because people asked for it, but it’s still a prototype.” -TPRA
I’ll keep posting updates when i will do some.


Duet Wifi + Duex 5 boards.
Suspended Z
Igus bushings
MGN15 hiwin rails for Z, MGN9 hiwin rails for XY
Openbuilds C-Beams + laser-cut aluminium plates frame
4x titan extruder
4x e3d v6 with threaded heatsink, pt100 sensors and precision cartridges
0.9° steppers, (1.8° for Z, with a 20T/40T pulley system)
PrintBite build surface
Capricorn tubing
MKS DS450 servo
240V heatbed with panasonic SSR
Gates belts
Shoulder screws on every pulley
Hall-effect endstops

E3D Toolchanger Clone
Tool Changer
Tool Changing 3D Printer
Tool Changer
Toolchanger parts
machined aluminum e3d tool changer parts
toolchanger assembled
corexy 3d printer tool changer aluminum metal parts
Aluminum toolchanger parts
e3d tool changer aluminum halo
Duetwifi expansion board
e3d tool changer duet wifi electronics wiring
Duet Wifi expansion board for toolchanger
e3d tool changer duet wifi electronics wiring
E3d tool changer linear rail mount
e3d tool changer linear rail
E3D Tool Changer Electronics
e3d tool changer electronics
Tool-changer aluminum plates
e3d tool changer motor mounting

Kinematic Couplings / Mounts

How to Layout a Kinematic Mount Using the Maxwell Criterion

Practical Precision demonstrates kinematic mount design and layout using the Maxwell criterion.

  • The Maxwell criterion
  • How to layout a kinematic mount using the Maxwell criterion
  • Common kinematic mount layouts
  • Challenging layouts – optical payload for a stabilized gimbal
  • Stability and repeatability over micro assemblies and disassemblies
  • Example of a poor layout for stability and repeatability
  • Satisfying the Maxwell criterion for a planar kinematic mount
  • Instantaneous centers of rotation and the kinematics of the mount
Kinematic Mount CAD Design

In this video Practical Precision demonstrates how to design and model a kinematic mount in CAD PP uses SolidWorks. Kinematic mounts are useful for precise mounting in highly accurate applications.

  • Principles of kinematic constraint
  • Design of a Maxwell-style kinematic mount
  • Preload mechanisms for kinematic mounts
  • Design considerations Parametric CAD model of a kinematic mount
  • Key challenges of kinematic mount design

SolidCore Kinematic Bed Setup

While this write up is still a work in progress as I continue to research kinematic mounting and the math used to find the angle that properly constrains the bed to allow for thermal expansion. This is the documented details of how the SolidCore kinematic mounting system should work.  So comment or correct me if…

SolidCore ToolChanger

Although this page will be used to document and collect resources to implement a toolchanger on the SolidCore printer, we’ve only completed one so far for this case study. The following design analysis is discussing a toolchanger project we prototyped for our customer, Nandan. The majority of the topic currently being discussed is of the…

SolidCore CoreXY – Frame

Frame Profile Specs Size 2020 or 20mm x 20mm Style T-Slot Frame BOM Part List Part Quantity Description Source Documentation Folder Frame Extrusions 2020 T-Slot ZylTech Frame Size List Frame Folder 570mm Long 6 Vertical (Tall) ZylTech Frame Size List Frame Folder 430mm Long 3 Vertical (Z-Axis Rail) ZylTech Frame Size List Frame Folder 660mm…

SolidCore CoreXY 3D Printer

Modular Scalable Linear Rails Balanced Carriage Pull Enclosure BOM utilizes most available parts All Metal Parts or 3D Printed Z-Axis: Independent Driven or Shared Belt Routing

CoreXY Belt Routing

CoreXY Belt Routing  One of the most important parts for corexy movement is belt routing. Here’s a guide to the mechanics of corexy belt routing pulley layout in order to get accuracy and constant belt tension. Belt Routing Methods There are two main ways to implement the corexy belt path. Either a stacked pulley arrangement…

Best CoreXY 3D Printers 2023

With so many 3d printer kits and open source build plans available, it can be a challenge to choose an option for your 3d printing needs. Every 3d printer design has different design goals for different needs as well as different compromises. Whether you’re building a new printer or just in need of a new…

CoreXY Kinematics

CoreXY Kinematics Explained? The corexy kinematics mechanical arrangement includes a unique motor movement where the X or Y motor move together or opposite of each other to move the carriage from left to right or towards or away . If you were to move just one motor you would see the print head move diagonal..…

Large CoreXY Build-Hardware And Firmware Settings That Increase Performance

CoreXY Scalability The scalability of a core-xy printer can be an issue when it comes to hardware design and implementation. An increased belt path can also introduce problems resulting in artifacts in 3d printed parts. A rigid gantry setup is needed and proper binding is a must. 9mm and 12mm belts are available to account…

CoreXY vs Cartesian

There are a few different types of 3d printer kinematics to choose from, with cartesian kinematics being the most common. Recently the corexy architecture has become more popular. In this guide, we will compare corexy vs cartesian kinematics in terms of their speed and print quality so that you can understand the difference in each…

Duet 3 Wiring Guide

How To Wire The Duet 3 Mainboard 6HC The Duet 3 is a great board for your 3d printer, but wiring it up can be confusing. This tutorial will walk you through how to wire the Duet 3 mainboard 6hc to your Workhorse 3d printer. Duet Wiring Instructions This is a guide on how to…

Duet Wifi

DuetWifi Expansion Board Wiring and Firmaware Configuration

Stepper Motors

What Size Stepper Motor Should You Use? While the size of a stepper motor is just the footprint it’s the winding that determines torque. There are Nema 17’s with as much torque as a Nema 23. Most 3d printers use stepper motors to drive z-axis motion lead screws to raise or lower the bed or…

Linear Rails

Are linear rails better? Linear rails produce a high degree of accuracy and stability compared to round rods with linear bearings. They have better mounting, and smoother motion which improves print quality and machine reliability.  What are linear rails used for? Linear rails are used in different applications in industrial machine and motion system design.…

Railcore 3D Printer

We first discovered RailCore Labs and their beautiful corexy design at MRRF 2019. The Railcore 3d printer was designed by designed by Tony Akens and J. Steve White when discussing an idea of a core xy printer with linear rails on the x,y and z-axis on Reprap IRC.

Rapid Event TCT

Although there are many 3d printing and additive manufacturing conventions, there is nothing better than Rapid Event. The RAPID + TCT conference, also known as Rapid Event; is a worldwide known 3d printing show / conference in North America. You can find some of the most influential additive manufacturing companies that attend each year ath…

Houston Maker Faire

Maker Faire is a interesting gathering of makers and creative people who enjoy learning and who love sharing what they can do with the maker communnity. If you enjoy technology and the DIY approach to life you’ll fit right in. Engineers Artists Scientists Crafters Re:3D Gigabot Large Scale 3D Printer re:3D showcase their new 3d…

How to Choose Wire Gauge and Length for Your 3d Printer

How can you calculate the wire gauge and length for 3d printer wiring? Most 3D printers use either 12V or 24V. The hotend of a 3D printer may draw up to 4A, while a heated bed draws nearly 12A. If the wire is not large enough or longer than needed, it will have more resistance…

How to 3D Print Large Parts

Layer Adhesion Layer and surface adhesion is a critical component of 3d printing. 3d printing issues increase as object size increases. Large 3d printers can be more difficult when it comes to bed leveling. As the extruded layers bond together they are fused with heat. Proper surface adhesion decreases warping that can decrease part quality. …

Industrial 3D Printers

Additive Manufacturing or AM rapid prototyping continue to advance production 3d printing and offer solutions for manufacturers with applications in additive materials and software. Additive Manufacturing Rapid prototyping and additive manufacturing has came a long way over the years. Professional 3D printing to large format metal 3d printers are advancing capabilities of additive manufacturing allowing…

3D Printing Dictionary

3D scanner – A device used to analyze physical objects to create a solid model from the cloud of points. 3D Printing – The additive manufacturing process of creating a physical object layer by layer. Also known as Additive Manufacturing. 3d Printer – A machine that creates a physical object one layer at a time…

Large Scale 3D Printers

BigRep has been an industry leader in professional large scale 3d printers for a while now, and we had the chance to see their new machines at Rapid Event + TCT additive manufacturing convention. They showed off two of their printers they had on display: BigRep Studio and the even larger version, the BigRep One.…

Duet3D Troubleshooting

Duet 3 Error- Failed To Get List Macros Not Found Failed To Get File List Directory 0:/macros not found Firmware Folders Insert sd card in computer and check for proper folders. Create a folder and name it “macros” if needed. Duet 3 running in standalone mode SD Card Folders  The SD Card Folders must be…