I am attempting to print the Benchy boat but every attempt so far has been unsuccessful. The print has a sort of slope/blob on the nose of the boat, which emerges after the first 30 layers.
Here you can see the front of the boat already arching up:
I have tried decreasing speed to 40 mm/s but the issue remains.
Printer: Geetech Prusa I3 Pro B
XY Accelleration: 1000 mm/s2
XY Jerk: 20 mm/s
Retraction Accelleration: 2000 mm/s2
Extruder Jerk: 5 mm/s
Printing Speed: 50 mm/s
Travel Speed: 120 mm/s
Layer Height: 0.1 mm
Infill: 60% (Lines)
Material: PLA, 200 °C, 1.75mm filament, retraction enabled.