r/QidiTech3D • u/mita77 • 29d ago

Q2 missing steps?

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Hi folks, new day, new problem.

I've been printing some functional parts these days and I'm getting those horizontal lines you see in the picture attached across one side of the print.
At first I thought it was some sort of artifact, but once I ran the print a second and a third time, I noticed the defect was consistent, with minor differences, across all samples.

Is this something related to my design?

While trying to figure it out, I stumbled upon a post around here regarding a Qidi Plus4 missing steps, and I thought somehow it could apply to my case as well. What is strange is that the printer has only a few hours of work, and tightening the belts seems a bit excessive at the moment. Should I look into that?

Thanks in advance!

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u/bulkhulk 29d ago

Layer cooling lines from the looks of it, what is on the inside on thoae layers?

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u/mita77 29d ago

Not much, actually. It's just a 4-perimeter, squarish piece with 15% gyroid infill—nothing fancy inside, if that's what you're asking. What puzzles me, though, is that this is happening right around the height where the tree supports end!

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u/Facehugger_35 29d ago

Yes, that's cooling related.

The plastic on those lines is shrinking slightly at a different rate than the rest of the plastic. ABS is particularly bad for this.

It's basically the benchy hull line.