Filament does not load for second extruder

Vertex 3D Printer Vertex - Assembly and user manual
1

Extruder 1 works fine on my Vertex K8400.
The second extruder was installed successfully but filament does not load.
Filament loading command for extruder 2 starts correctly. When nozzle 2 temperature 210 degree C is reached, the bottom ventilator start but no filament movement. The stepper motor gives one little sound the moment the ventilator starts.
Filament unloading command for extruder 2 is also executed, but stepper does not move after the nozzle 2 temp reached 210 degree, only ventilator starts.
Firmware is 1.4 dual head.
What could be the cause? Where to start fault detection?
Please advice.

2

Hi Abou,

  1. the stepper driver board is defect
  2. the stepper driver board was not correctly installed (it is a 180° rotated on the board)
  3. check all connections,stepper and board
  4. check voltage on the stepper driver board 0.92V (I guess it was)

You can swap the stepper driver boards to see if the board is dead or something else. BUT watch out the position on the board.
The four boards are pointing in the same direction while the 2nd extruder is different!!!

Best
Frank

3

Problem solved.
Problem cause was the stepper driver board (second on the checklist).
Now it works fine and I can continue testing with two colors.
Thank you Frank for your advice.

4

Hi Abou,

guess what… I made the same mistake, but killed the little driver board.
It is exactly explained in the doc, but I missed it :slight_smile:

Best
Frank