The 'Extra Restart Distance' on the Extruder tab was set to 5.0. Have never even considered this parameter before, so no idea how that got changed.
All a bit odd......
Looking at the gcode file, here's an extract from the start of the file: G92 E0.0000 G1 E-1.2000 F900 ; feature skirt ; tool H0.300 W0.360 G1 Z0.800 F1000 G1 X81.420 Y95.820 F4800 G1 E5.0000 F900 G92 E0.0000 So does the G1 E5.0000 not mean 'extrude 5mm of filament'? In which case, what is going on? ...
Here's a photo of a print I stopped after the first couple of layers. You can see the 'blobs' deposited when a new layer starts - the extruder gives a short forward burst. I have tried printing files done some weeks ago and they are fine. It is only the new ones I produce that are showing this. Any ...