My 3D printing part starts to bending after about 1 cm height and blue tape separates from bed I use a Prusa i3, and this is ABS printed part with 225/90°C. Why did this happen?






I tried to print this part again with new settings on Slic3r (I used Cura for previous print), but I got the same result. I found that the problem is because the model starts to bend after about 1&nbsp;cm height. Also the blue tape starts to separate from the bed.

I don't use the fan for printing part (although the MK8 extruder's fan works all the time), and the temperature for the new part was (225/85°C first layer and 220/80°C for other layers). Also I must say that the adhesion of the model sticks to the bed is very good and strong, but it is bent!
Multiple problems here. Let's try to isolate them.


Blue tape. Good for PLA, not suitable for ABS. ABS works fine with kapton tape, glue stick, hair spray, ABS juice over glass, aluminum or PCB epoxy composite board.
Always use at least brim feature to ensure good adhesion along the edges (your last photos have none). For parts with small hotbed contact area use raft.
Hotbed temperature should be 100°C+, because at 80°C adhesion is weaker. If you can't raise hotbed temperature to 100°C, think about thermal insulation.
Layers of plastic don't stick to each other. Either plastic comes from extruder being already cold (check that there are no draughts of cold air nearby), or you're printing too fast (50&nbsp;mm/s should generally work, if not try 30&nbsp;mm/s).
No infill between walls. Either it is set to 0 or optimized out by some option.
Round walls aren't round. Either printing speed problem, or your belts are loose.
Underextrusion. Bottom of your first print looks like mesh rather than solid surface. Check that plastic flow is around 100%.


Also check that your thermoresistor measures the actual temperature of the extruder (i.e. is in direct contact with it). Otherwise you will get overheated plastic extrusion, which looks like your first photos.

Also, print a 1&nbsp;cm cube first. Don't do anything complex, just cube.