I have been trying to print the same dinosaur model for several days and all my attempts have failed in the same place. On every attempt, the tail falls off the supports. Sometimes there is a little black fleck at the point of failure.
I've varied the print temperature +/- 5 °C. I've tried cooling at 60, 70 and 100 %. I've tightened the extruded gripper thing. I've dropped the print speed to 40 mm/s. On my last attempt, I increased flow to 105 % but no joy.
I got the furthest with infilled support, despite the tail falling off.
I'm using an AnyCubic Mega S with PolyTerra PLA. Model is printed with 25 % infill, printing temperature is 210 °C, 0.2 mm layer height, 3 walls @ 1.2 mm, 50 mm/s, 100 % cooling, default Cura support and raft for adhesion. I have inspected the nozzle and it is clean.
Does anyone know what I could do to prevent the tail from coming away from the supports during print?
The model is the carnosaurus from https://www.myminifactory.com/object/3d-print-dinosaurs-pack-200076.
I've been printing it as orientated in the file -- balancing on its tail almost vertical. Is this orientation unusual?
I wonder if this way up is best suited to resin printing and whether I'd have better results if I laid the dinosaur flat.
I decided to print something else. The new model, which I'd printed successfully three times before suffered from the same layer adhesion problems.
I re-printed the carnotaurus last night with a new, 0.25mm nozzle. It came out perfect. I suspect the original problem was down to the nozzle after all but haven't had chance to test another 0.4mm nozzle.