The original extruder wasn't efficient and reliable. So I replaced it by a home-designed holder + a Geetech extruder.
The new holder has been designed with OpenScad and was the las piece printed with the original extruder.
This thing is available on thingiverse :
To improve the rigidity of the X axis, I have added a second Z axis (screw+nut+stepper).
The printer and the second Z axis are fixed to a MDF plate. See details on my blog :
Last modification : a "shell" to give to the printer
- more rigidity,
- nicer look,
- more "mobility' (power unit and spool are fixed on the "shell").
Do anyone have solutions to improve the rigidity of the Y axis ?