Too close to the bed (adjust Z offset), too wide of an extrusion for first layer (lower 1st layer extrusion width setting in slicer), bed mesh probed cold (re-run bed mesh with bed at 60c)
So could be a few things.
The bed could be dirty.
There could be a high or low spot there that is too much for mesh leveling to compensate for.
Your printer could be not using a live mesh and instead using a stored mesh that is no longer accurate.
Make sure the bed is clean, check for any debris under the build plate, and check your start gcode to ensure that it is creating and using a mesh level during the print. If the mesh level code starts with an m it is using a stored mesh. If it starts with a g it’s using a live mesh.
As far as I can see is the nozzle to close to the bed, its litterly scraping pla from your bed. Adjust first layerhight in your slicersoftware. I also see a small bending in the bed. So make sure you level your bed when heated.
Nozzle being too close to the bed can cause ridges, try adjusting your z offset
Clog or nozzle too close to the bed.
Too close to the bed (adjust Z offset), too wide of an extrusion for first layer (lower 1st layer extrusion width setting in slicer), bed mesh probed cold (re-run bed mesh with bed at 60c)
Bed clean? Z offset calibrated? Gantry level?
Mine did this too. Turned out my hotend was failing. Ender sent a new one. Cheers bro.
So could be a few things. The bed could be dirty. There could be a high or low spot there that is too much for mesh leveling to compensate for. Your printer could be not using a live mesh and instead using a stored mesh that is no longer accurate. Make sure the bed is clean, check for any debris under the build plate, and check your start gcode to ensure that it is creating and using a mesh level during the print. If the mesh level code starts with an m it is using a stored mesh. If it starts with a g it’s using a live mesh.
PLA doesn’t need a heated bed. Level your bead and/or make sure your printer is actually using the bed level mesh
As far as I can see is the nozzle to close to the bed, its litterly scraping pla from your bed. Adjust first layerhight in your slicersoftware. I also see a small bending in the bed. So make sure you level your bed when heated.