Dual Extrusion - Increase amount of Filament printed to Prime Tower

[BR365 0]

Hello,
I use Cura 4.5 with a Dual 3D printer (Dual Extruder, mixing nozzle) and didn't find a good way to increase the amount of PLA printed to the prime tower before returning to the print area.

There are the following options:
Prime Tower Size

Prime Tower Minimum Volume

 

These two options may impact the amount of filament, which is printed to the prime tower when there is a colour change.

 

The first change works fine and the second colour is clear pure 2nd colour. But when it switches the second or third time, it seems, that the amount of filament printed to the Prime Tower is not enough to have a pure clear colour.

 

Is there a trick how to increase the amount of filament, printed to the Prime Tower?

 

Thanks,

Moritz
 

Edited April 14, 2020 by BR365
Wrong attachement