I am having a lot of difficulty to get any kind of a print from my Ultimaker 2. It seems that some of the issues are around my extruder gear not grabbing the filament at times. Often the filament will simply stop moving through the extruder and I have to manually push it up. When I go to change the material it usually doesn't actually remove it all the way because the gear is not grabbing it. Does anyone else have this issue? Do you know how to fix it?
Also, does anyone have some optimized settings for PLA? I am using the Ulimaker PLA. Even my first print of the Ultimaker Robot came