When I print a model in PLA (Extruder 1) with PVA (Extruder 2) for supports, the PVA doesn't adhere. It just strings. However, if I print a test model in PVA only, it adheres (to the build plate) and everything prints normally.
This issue began during a 51 hour print job. Up until about 35-40 hours, it was printing successfully PLA with PVA for supports. This included PVA adhering to and printing over a PLA raft. This print stopped with the message, "PrintCore in head slot 2 is taking too long to warm up." Up until this print, I had done many with PVA supports successfully.
I've done active leveling of the build plate, updated the firmware, calibrated Z offset, and ran the heater sensor test which was OK.
Can someone please help with this issue or suggest how I can further troubleshoot?
THANK YOU.