- Introduction
- Project Status
- Disclaimer
- How To
- Design Goals
- Compatibility
- Bill Of Materials
- Printed Parts
- Print Settings
- Assembly Guide
- Configuration
- Optional Parts
- Community
- Support My Work
- Credits And Thank you
- License
This is the repository for the Bear EXtruder and X Axis version 2 (BearExxa V2). It consists of an extruder and X axis designed to improve Prusa MK2.5(S, S+) and MK3(S, S+) print quality, speed, reliability and usability. It's the successor of the Bear Extruder and X axis V1. Like the previous extruder, it's fully open source.
Status: Currently building the repository for the Beta release
This project is on hold for now. It's provided "as is" for any adventurous users interested in having a good extruder for their Prusa or Bear. The beta version of the BearExxa V2 provided here is fully functional and safe to use. The end goal is to provide a kit with all the parts and an improved stepper and hardware for better print quality and reliability (read our Design Goals).
This project is only to provide an alternative extruder and X axis to your Prusa printers. We are not related to Prusa Research. We cannot be taken responsible for any damages you may do by using this project nor any decision Prusa would take on you (for example: loosing warranty). This project is not for beginner and is at your own risk.
How to print, build and start using the BearExxa V2:
- Read the Project Status, Disclaimer and Compatibility to make sure you agree to the limitations
- Buy the official BearExxa v2 kit or gather the parts using the BOM
- Buy the filament according to the Print Settings
- Download the Printed Parts
- Calibrate your filaments with our Calibration Guide
- Slice and print the parts according to the Print Settings
- Follow the Assembly Guide
- Enjoy your new extruder :)
The main goals of the BearExxa V2 are to focus on print quality, reliability, usability, precision, speed and to solve the inconsistent extrusion issue (602 issue).
➡️ Read the detailed design goals here
The BearExxa V2 is compatible with both Prusa MK2.5(S, S+) and MK3(S, S+). The original and Bear frames are both supported. The stock firmware can be used except for the initial calibration (self tests) for which we provide our own firmware.
➡️ Read all the compatibilities in details here
The BOM includes the list of printed parts and all hardware you need to build the BearExxa V2.
Warning
It's important to follow the recommended print settings and to calibrate your extrusion multiplier before printing the parts (for each and every spool that you use). Check our calibration guide here.
to do: download link
Warning
It's important to follow the recommended print settings and to calibrate your extrusion multiplier before printing the parts (for each and every spool that you use). Check our calibration guide here.
➡️ Read the print settings here
As this is only a beta version provided "as is" we only have a quick assembly guide.
➡️ Read the quick assembly guide for beta version here
Here are the detailed configurations for your firmware.
Note
The config for the Prusa firmware is covered in the assembly guide.
➡️ Read the configuration documentation here
- Multicolour with MMU or ERCF: optional_parts/mmu_ercf
- Reverse Bowden: optional_parts/reverse_bowden
to do: download link
Find optional parts designed by the community at guides.bear-lab.com/Wiki/community_optional_parts.
- Discord server of "The 602 Wasteland" community : discordapp.com/invite/hYUjSnW
- Twitter (X) : @gregoiresaunier
- Mastodon : fosstodon.org/@bear_lab
- GitHub : github.com/gregsaun
Do not hesitate to ask if you have a question.
The bear project is made possible thanks to its supporters. You can help via
- Patreon: patreon.com/gregsaun
- PayPal: paypal.me/gregsaun
- GitHub Sponsor: github.com/sponsors/gregsaun
Massive thank you in advance ❤️
- The close help of Florian Däubler, Paul_GD, Schaun Doe, Sleene and vertigo235
- All my Patreons, it would have been impossible without their help
- LDO Motors for their continuous and precious support and sponsoring. LDO will manufacture the official kit for the final release with a custom stepper
- E3D Online for providing free hotends for development
- Bondtech for providing free IDGA gears for development
- The fan duct knob by Amelia Marie Collins
- René Jurack for helping me on CFD simulation for the nozzle fan duct
- The 602 Wasteland Discord community for their precious knowledge, advice and great talks
- Keith Bennett for making the Prusa AIO firmware compatible
- PoiTEE for the great talks and testing
- FilamentFrenzy for having tested and make noise for an early version
- Prusa Research for their MK2.5S and MK3S designs
- Adrian Bowyer for inventing RepRap
Thank you everyone ❤️
The Bear EXtruder and X Axis v2 (BearExxa V2) is an open-source hardware project created from scratch by Grégoire Saunier with help and inspiration from the people and companies listed under "Credits and Thank You" as well as contributions linked to this repository.
All texts, images, PDF files and animations in this repository are licensed under the terms of the CC-BY-SA 4.0 license. The full license text of CC-BY-SA 4.0 is available in this repository at ./LICENSE-CC-BY-SA-4.0. Read more about this license here.
All content in this repository, except for texts, images, PDF files and animations is licensed under the terms of the CERN-OHL-P v2 license. The full license text of CERN-OHL-P v2 is available in this repository at ./LICENSE. Read more about this license here.