Can anyone help me out with this?
http://www.youtube.com/watch?v=r_Mj7Qj0iq8&feature=share
It kinda looks like there’s moisture in your filament, which steams up and expands as it get heated in the hotend. Try drying your filament (just put it in a warm, dry place for about a day) and see if that helps.
I actually thought of that, but i keep the filament in a pretty warm, dry room all the time… And I’ve never had this problem before… Any other suggestions?
Temperature instability on the hot end? Extruder stepper misbehaving? Dirt on the filament? always put a bit if foam/sponge where the filament enters to clean the dust away. Close to an open window/door? Cold/hot air can cause this type of curling. Maybe shield the print area better?
Temperature instability on the hot end?
How do you suggest I check for that?
I will put a sponge in to prevent dust from getting in, but this is a new setup so i doubt that that is causing this problem.
Door and windows were kept closed during printing so that’s not it…
Or diameter differences on the filament leading to more material as calculated in the chamber.
Wrt hot end temp - are you using marlin? Check PID parameters, they might be a bit too aggressive.
Try a free air extrusion from a good height to see if there are any inconsistencies in the extrudiate, if its moisture, you should see bulges in the extrudiate . Might be worth trying a different slicing too tool just in case its a gcode thing.
Did u check if the stepper over step? I mean did you make sure the current of the stepper driver is correct?