Adeshion troubles

I have a Taz4 with its own extruder. Since sunday, I started to have severe adhesion troubles: soon after extruding the skirt, filament doesn’t attach to the bed as you can see in the pics. I’ve already leveled the bed buit never changed. Any idea?

More than likely your Z axis end stop is too high. Adjust it down just a little and try again.

You mean the black screw on the printer’s left side or the slicer settings?

That is the Z-End Stop adjustment screw. The slicer settings would be Z height. The screw is the ‘do not pass this point’ setting for head movement. I believe the firmware will try to prevent movement past the End stop triggering.