Thank you very much. You are correct, I have Z hop enabled on the 1st print (the "in progress") photo, but I didn't have it enabled on the others (in fact today is the 1st time had it enabled). Still I had issues.
Having said that, I will of course reprint without Z hop enabled, and yes my printer is CoreXY (Creality Ender 6) not delta.
I do believe that your suggestion is relevant and on the right track even while I have the issues even with Z Hop disabled - e.g. it may be something to do with retraction as this printer is Bowden setup and has a very long tube. I'm not arguing with your suggestions, just clarifying it further.
May I please ask you & the community to keep helping me in troubleshooting this? Apart of disabling Z Hope, what else should I look at?
Many many thanks!
Edited by Alex101Typos
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gr5 2,293
You also have retractions on those layers. I'm guessing you enabled "z hop when retracted". Turn that off.
z hop is meant for delta printers. 99.99% of printers are not delta printers so you probably don't have one. z hop causes the z axis to move the nozzle farther from the print and then back and due to backlash you have inconsistent results where some layers overextrude (hence squish the next layer so it sticks out and makes a line) or underextrude (nozzle slightly too far from print so you get a layer that is thinner and sticks in and makes an inward line).
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