Bondtech Extruder

A new powerfull extruder for 3D printers with great pushing power and reduced risks for filament grinding. The double drive wheels gives an excellent grip of the filament without deforming the filament as with standard spring loaded bearing type extruder.

3D printer parts and enhancements

Creative Commons Attribution Noncommercial Share Alike

Commercial use is not allowed, you must attribute the creator, you may remix this work and the remixed work should be made available under this license.

Learn more or download attribution tags

Description

I have been involved into 3D printing for the last 2 years and one of the biggest problems are related to the material feeding. Todays extruders that uses one driven wheel with a spring loaded bearing that pushes the filament against the drive wheel. 

This method has some disadvantages as

- Low pushing force
- Risk of grinding the filament that leads to a failed print
- Slipping that leads to underextrusion
- Deforming the filament that leads to increased friction in the bowden tube.

The new Bondtech extruder uses 2 drive wheels that are equipped with sharp teeths that grab the filament on both sides wich gives a lot of advantages over the standard extruders. Some of the most important ones are the following.

- Huge pushing power that elliminates the risk of under extrusion, tests have
  verified that it is over 9 kg with a 1.75 mm filament.
- Minimal risk for filament grinding
- Possible to go high speed due to the big the pushing power, tests have been
  made with 250 mm/s printing with 0.4 mm nozzle and with no filament grinds.
- Possible to go with small nozzles 
- High torque Nema17 stepper with a high precison planetary gearbox gives
  high resolution and fast retracts.
- Adjustable secondary drive wheel to optimize grip.
- Easy access to drive wheels for cleaning

A walkthrough of the design by Eric Lien:

The extruder in action: https://plus.google.com/109092260040411784841/posts/gnn6rmyWWC6

In a few weeks time I will be able to provide kits with the metal parts and also professional 3D printed SLS parts for the housing components. The current version supports only 1.75 mm filament but a 3.0 mm version are in development.

Materials and methods

- 1 x Front housing
- 1 x Rear housing
- 1 x Logo plate
- 1 x Nema 17 with 5:1 planetary gearbox
- 1 x Bondtech large drive wheel
- 1 x Bondtech small drive wheel
- 2 x 5x10x4 ball bearing
- 2 x MC6S M3x16 socket screws
- 2 x MC6S M3x40 socket screws
- 2 x M4 nuts for securing bowden tube
- Bowden tube 4x2.0 mm

Documents

Issues

Issues are used to track todos, bugs or requests. To get started, you could create an issue.

Comments

667f91a9739b4b2a8641b4ae63549bd7?default=blank&size=40amir1355 added this to the tools collection ago
6e2d6687a97f7da9ba75c498d32c3460?default=blank&size=40marcopolo0988 added this to the PIEZAS IMPRESORAS collection ago
Mini jens profiljeracom added this to the Ultimaker collection ago
4da953152f1870301e9f83f20f44fa33?default=blank&size=40Juan José Carmona Martinez added this to the My favorite collection collection ago
929f12cf18c9f6f970a843501f3d978e?default=blank&size=40cyberhawkv added this to the My Collection collection ago
E1b4bb8e639f6e50a743597e3772b499?default=blank&size=40Kraeuterbonbon added this to the UM2 collection ago
163757992e141e54df5ffe059a2026bc?default=blank&size=40Carsten Bach added this to the My stuff collection ago
7f4760d128dd73216ce35f5bfb1ae63c?default=blank&size=40RoystonS added this to the Interesting collection ago
9099abecd6c2b2ab49521eae9d396719?default=blank&size=40Jeremy Pearce added this to the jp collection ago
9e9f7b586c47c5c88b0abc134983a517?default=blank&size=40Jason Stokes added this to the printer upgrades collection ago
276291a2a836d92b1712dc66988d8bb1?default=blank&size=40Toshi added this to the To print collection ago
5243c8eed82be8d1dc4fee62bcc0a5cc?default=blank&size=40bic2017 added this to the Equipement 3D collection ago
Mini photo 2016 12 26  17 45 38Barrett Dent added this to the 3D Printer - Upgrades - Extruder collection ago
5241459bab4f55c667bd1dc156beb9b0?default=blank&size=40lio_getz added this to the things i need collection ago
79c95d070d3dc5ef5e984abfd8da46b1?default=blank&size=40lanternfish added this to the Stuff collection ago
44d601aecb373b87fdddd0fbb222273d?default=blank&size=40mils24 added this to the Things to Print collection ago
A43afe676271e13fdbb56593c8b19a89?default=blank&size=40ehrgeiz added this to the 3D Drucker collection ago
Fcb3469695c95a5e23c2429eaae67447?default=blank&size=40Adam Rękosiewicz added this to the mods collection ago
8a96c63f45a1984281fa1ac2822827f3?default=blank&size=40Berni80 added this to the Ultimaker collection ago
57a8a7c0b96733aad80b8f176476b6fe?default=blank&size=40Viktor Samuelsson added this to the 3D Printing tools etc collection ago
E2f2eebcf69ccea499eda3d906d4e50a?default=blank&size=40brepettisisadonkey commented ago

Are the metal parts available somewhere?

8d70ed5f30a5ada44e82e9f742d1478d?default=blank&size=40Peter Murray added this to the Ultimaker2 collection ago
43c7d28bd5217d270b6039ed68ebce74?default=blank&size=40Lars Reder added this to the 3D - Drucker Optimierung collection ago
2b6f4d2d0973bed25b8b511f81f18163?default=blank&size=40Willem Gerber added this to the Printer Parts/Tweaks collection ago
Faeaec9cca51f2f74ad065d56c5f0ade?default=blank&size=40xchapelut added this to the UM2 collection ago
Fa97770b6184e368661ee1fc26383f9b?default=blank&size=40Eelco Rouw added this to the Prusa i3 collection ago
Mini screen shot 2013 09 30 at 16.40.44a.mediumClint commented ago

What about flexible filaments? Do they feed through without assistance or is it necessary to open it up to start the feed (through the bottom part)? How can you tell if they start jamming up inside?

Mini jamesr headshotsmallJames Rivera added this to the Printable Parts Ideas collection ago
Mini jamesr headshotsmallJames Rivera added this to the 3D printer upgrades and accessories collection ago
C932ccdad2c6671b5d979c61416d3cf6?default=blank&size=40Daedalos added this to the UM2 parts collection ago
88eed1976e67344d168d01aef4c0e3df?default=blank&size=40RaceClox added this to the Extruders collection ago
Bf6b75811a5a3f88a827d1471cc4fc81?default=blank&size=40Sergiu Ionascu added this to the 3d printer collection ago
B236ffc98e4aff5bb419036342c3ef76?default=blank&size=40Charlie Fenwick added this to the mMy Prints collection ago
Cb013efa08026866713ee8ea4f98a733?default=blank&size=40Sergey Fedorov added this to the 3D Printers Upgrade collection ago
F8c7484d9fd77f69783dee96a240457b?default=blank&size=40sgali added this to the Prusa improvements collection ago
Mini web   marchio compatto psd  1 Fablab Imola added this to the ultimaker collection ago
C0188cc1a804d7460418b79d23092be5?default=blank&size=40Chattermark added this to the my_ym_stuff collection ago
24ee2577539ae18c4b0af758a9234ad4?default=blank&size=40Tongdam added this to the Extruder collection ago
228b8433e4639c949e9f8719f0c56036?default=blank&size=40Martin Bondéus published this design ago