Quote Originally Posted by edu3d View Post
Looks like one of three issues with your extruder setup:
A) Not hot enough so causing jams(if using PLA try 190c or 230 for ABS)
B) Your tension is off on the extruder causing it to miss steps and not grip filament.
C) Your E steps are not configured correctly.(google for extruder calibration and there are some great guides out there)
I completely do agree with edu3d. I am sure that your E steps have not configured correctly. Please check it once and try again.