I am printing a model with PETG (with CTE setting, 245 degrees) + PVA as support.
The layers where there is only PETG are fine. However the PETG layers where there is a mix og PETG+PVA is quite weak. As a result, the model splits like this:
For the record, I used PVA as support in the open area in the middle.
The layer that was split seems quite poor:
What can be causing this? I have a theory that the filament is retracted too much when it changes materials.