TLDR; The top surface shows the lines are printing all wonky even though lower height lines print fine.
I was printing this calibration print to fix my vertical esteps. I noticed the print has an obvious height where the quality drops off drastically.
It was printed unsupported, so the tops if the circles make sense.
The visible band below the top circle makes sense I guess (as it’s the only part of the part that has a long straight line… so prints at a faster speed)
from about half way up the big circle the surface texture gets much worse.
Which way was the model orientate on the build plate?
Any tall model has 2 resonance frequency in both the X and Y axis. Thin flat models are most susceptible. The Resonance frequency lowers as it gets taller. Klipers input shapers are calibrated at the build plate and can’t predict a wobbly model.
Christian Vick’s extensions have a function that automatically lowers print speed as the gantry moves up in an attempt to compensate. I’ve not tested how well they work
Yep it was oriented in probably the worst way for wobble in the y axis. I’ll do some resonance tuning. I have Christian Vic’s mods, I haven’t worked out how to engage the one that reduces speed at height though. Good call. I recon you are right. If I even rotated it 90 degrees so the y move is longer it should fix it.
