# Creality CR-10 problems with extrusion while printing

I have an extrusion problem with my creality CR 10 3D printer while printing. I am using a standard 0.4 mm nozzle with a 1.75 mm diameter PLA and I use Cura as my slicer.

This printer worked perfectly fine and I stopped using it a few months ago right after the problem started.

When I try printing a .gcode file, the first layer is very thin but visible (it seems like the glass bed is engraved). However, after the first layer is complete, the extruder stops working properly. It moves forward then jumps backwards so it looks like the filament isn’t moving (I can also see the extruder’s marks on the filament). Also, the axis seem to move fine in all directions as I’m able to see a clear first layer.

However, when I go into the “prepare” menu of my printer and move the extruder, it works great as the filament flow is very smooth.

Hence, the problem is only visible while printing. I don’t think there’s a problem with the .gcode files as I printed them perfectly fine beforehand.

• It looks like your nozzle is clogged. You need to perform a “cold plug“ (google it). – Adam S. May 9 '20 at 14:56