Does anyone have any tips on how to prevent this piece from warping? To be clear, I let it cool on the plate for about an hour until it came down to room temperature, and it only is warped after I pop it off the build plate.
I’ve tried printing it multiple times and it keeps warping. It is PET-CF. Part is approx. 6x6”
Any help would be appreciated!
Have you tried putting the plate with the model in the freezer for 10 minutes? Even though you may have let the model cool to room temperature, clearly room temperature plastic does not warp. If you place both the plate and the model in the freezer, it will produce a different result.
Warping is caused by stresses building up in the part and the plastic giving in to some of those stresses.
I’m not familiar with printing PET-CF but there is quite a temperature change in filament after deposition and it tends to shrink.
Might verify but a higher temperature in the chamber will keep already printed stuff warmer so it doesn’t shrink as much before subsequent layers are printed. Things that tend to make ASA curl are thick walls and high infill settings. May or may not be true for PET. If you can reduce wall, ceiling, and floor counts and infill percentage you may get less strength in the model trying to curl it?
Surprised it’s not just lifting. You’ve got some bed adhesion!
If putting the plate with part still adhered in the freezer to ensure a more complete cooling does not improve your results, then chances are the stresses are internal and the adherence to the plate is simply strong enough to counteract them for the time it is attached. I would look to prevent those internal stresses from forming by controlling chamber temps and part cooling to help eliminate the temperature differentials that can introduce the shrink induced internal stresses.
The last time I printed ABS, I let it cool down, but it was still clearly warm when I took it out. And when I removed it from the printer it warped immediately, it even detached from the plate. I could see how it warped. Next time I will have to let it cool longer and therefore more slowly, over several hours in the printer. I had a print object with thin walls and hardly any filling.
