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Comment on This is because of a filthy print sheet, right? (more pictures inside)

Yeah, I’ve even tried the same model rotated 90 degrees, and the issue stays in the same spot relative to the print sheet.

It’s worth noting that once the infill starts, the “washboard” evens out, resulting in an overall fine print.

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icelimit@lemmy.ml ⁨2⁩ ⁨weeks⁩ ago
Then it’s a leveling issue. That corner is either too high or too low. Not sure why it’s not been suggested yet.

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morbidcactus@lemmy.ca ⁨2⁩ ⁨weeks⁩ ago
Total anecdote, I had similar washboarding with my mk3s, I did a bed levelling mod that replaced some of the standoffs with silicone tubing spacers and that helped a lot. It was always in the same spot and it would mostly show up on prints that covered large areas and toward the edges of the bed.

I do echo others though that I do think extrusion multiplier and first layer offset do play a role with it, petg doesn’t like the same amount of squish that you can get away with using abs (not to say it doesn’t happen, just doesn’t look as rough, it doesn’t cause a failed print for me and I don’t mind a quick cleanup with a deburring tool depending what it’s for).

Does it show up if you flip the sheet just as a thought? I recall having a bit more of an issue with one side of my satin sheet for example. Last thought, could be worth giving things a long heat soak before doing meshing and homing, make sure everything is more or less stable expansion wise.

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papalonian@lemmy.world ⁨2⁩ ⁨weeks⁩ ago
I figured that the second or third layer would kind of “iron out” the imperfections, but still strange that it’s occurring nonetheless.

I’ll see spots like this on some of my prints, and that tells me to wash my print sheet, but it’s never in those 45° lines like yours. I wonder if you can feel any texture difference running your fingers over the trouble spots? sometimes you can wear out parts of a textured bed and have smooth spots that are lower than the rest of the bed. It’d be really weird for it to happen in that exact pattern, though.

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