bondtech extruder

created from Eric Lien (not from me)

new and wonderful design to http://www.bondtech.se

you can use a planetary box http://www.thingiverse.com/thing:1321364

Description

(Eric Lien speak) 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