thank you very much for your response. We tried to adopt some of the recommended settings from this post. We managed to print the PCL scaffold partially using a PVA support structure. Unfortunately, neither the printing process nor the result meet the requirements and have a poor quality. And most important the below reported problem also occurs when using a smooth PLA filament.
Ultimaker S5-Printing a scaffold with PCL filament (AA 0,25) and Ultimaker PVA (BB 0,4) as a support material: Within the 8h printing process for 10 scaffolds at a time the printer stops around 20 times, giving the alert that there is material empty and the filament spool needs to be checked. Of course this is not the case. If I change the filament I recognize always that the respective filament (PCL/PLA) is damaged on the location where it lies within the motor, is eroded on this location from the tooth wheel of the motor and therefore the filament seems to be stuck within the motor. We recognized the same problem in the Ultimaker 3.
Even if I pretend to change the material 20 times within this process and remove the damaged filament part every time, the received printing result is poor! There are always layers missing or poorly extruded (obviously whenever the motor is not able to protrude the filament anymore). As this also happens while using the PLA filament and not only the experimental PCL I do not know how to proceed.
The scaffold parts that are printed in the time between the alerts are perfectly fine. I conclude that there is neither a Problem with the model, printing accuracy or Filaments.
We use Facilan PCL, 2.85mm. https://www.3d4makers.com/products/facilan-pcl-100-filament?variant=22537902212
I am happy for every all suggestions and experiences