This image is of a single line 50mm long and during that 50mm 1mm of filament is extruded.
1 mm extrusion is 5 full steps so if there is a problem with the micro-stepping I should see 5 oscillations in the 50mm so 10mm apart.

I am not sure it si enough to call it but the oscillation is certainly there. It is the same for a Y print as an X print.

oneline.jpg