Rising tower stability

Hello everyone.

I post this message because I no longer know what what, or how to do it, without understanding anything.

Since I received my M300 Dual printer (about 1 year), I have often printed in “single print”. But every time I wanted to print in “Dual printing”, there is the rising tower that breaks and there is filament flowing everywhere. (See video).

I did :

  • Axis maintenance
  • Belt tension control
  • Plate calibration (0.0 / 0.0 / 0.1 / 0.1)
  • Change of Z-Suppor filament

Nothing works, as soon as the tower reaches about 4-5 cm in height, it breaks and then the mess is everywhere. (Filament all around)

The object to be printed is good but it is only the tower that breaks.

Thanks for your help.

Ling video : https://youtu.be/KSn-x-MGQ2M
Link projet Zortrax : https://www.swisstransfer.com/d/304462e2-e26e-46d0-8f20-74867ad53eee

Am I the only one with this problem?


Did you also perform the hotend switch calibration and nozzle alignment? While printing in the dual-extrusion mode - it is crucial to set the correct position of the hotends, as well as the extruder’s position.

Moreover - you can try the manual calibration.

Best regards,