Extruder pauses suddenly

Islam

while 3d printing, the extruder stops suddenly for a while and then resumes working again normally in all layers (not only first layer)and the nozzle leaves some spaces without filament as shown in the image

Islam

Islam said

http://imgur.com/CniJ8Eh

Repetier

Could be not enough force so it stalls. Maybe temperature is not high enough so it can not put new filament through until it is melted a bit more. Could also be overheating of stepper driver so it pauses until cool again to extrude.