extrudes doesn't let me print faster than 10mm/s

Hi!

I have a bulldog lite extruder, E3 Hotend with 0.4mm nozzle and use Slic3r and Marlin and try to print PLA. I'm sure you can help me with my problem. Whenever I try to print faster than 10mm/s, I can feel how the filament starts to skip. When I extrude manually and slowly, I can get up to 0.4mm/s extrusion, but not faster. The temperature is high enough, 210°C already.

When I print something with the default extrusion width, the line is only about 0.2mm wide. It looks better when I set the manual extrusion width to 0.2mm, but this doesn't seem right with the 0.4mm nozzle.

Can you help me with where to look for the source of the problem?

Thanks

Edited 1 time(s). Last edit at 03/17/2015 11:12AM by GoingForGold.

Make sure that your heater and thermistor are properly attached to the controller board, and that your printer's getting enough power. Alternately, you might have a jam in your hotend, or your extruder's not powerful enough. Mind attaching a picture?