I recently started printing Polymaker's PC-ABS blend on my modified Ender 3 v2. The print quality is good but the layer adhesion is pretty bad.
The layers aren't delaminating while printing but I can snap the chimney off of Benchys just with my fingers. Print quality and layer adhesion are the same on Benchys with and without an enclosure.
My enclosure gets to around 65 °C air temperature, but Polymaker recommends 90 °C. I doubt my Ender would function at those temperatures.
Cura settings are as follows:
- 270 °C 0.4 mm brass nozzle
- 105 °C bed
- 0.2 mm layer height
- 0.4 mm line width
- combing off
- cooling off
- 15s minimum layer time
- Lift Head on
- 4 mm retraction at 33 mm/s
- 30-22.5 mm/s print speed
- 3 walls
- 5 top and bottom layers
- 20 % lines infill
I have already tried a wider line width, and I don't think going any hotter or slower would help. What could I try in order to improve the layer adhesion?