Filament doesn't go through correctly...sometimes

[Mark]

Is your hotend temperature too high that caused the clog? Maybe it is not well cooled down.

[Robo Techy]

Yes, it might be the heater setting was too high (250C), however, as in my other posts, the real issue is the lack of a bevel on the throat and the gear is too large for 3mm and makes the filament bend to get through.