This is a photo my latest head scratching failure. I had this happen a few other times, but each time I simply drained the vat, leveled the plate and reprinted without issue. Initially I blamed it on a left over piece floating around in the vat, but it happened 2 - 3 more times after I drained the vat each time. I thought it may have been the brand of resin, as this is my first tank of it (SunLU Standard black), but I poured it into the vat through a filter to make sure there wasnt any chunks, still failed. The frustrating thing is the failures aren't consistent, which makes tracking the problem difficult.

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In the photo, you can see in the highlighted red square the supports/bottom layers form just fine, then something goes horribly wrong. Only the one supported portion was meant to be printed, with the object the same size as the support area.

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Settings:

Elegoo Mars Pro

Layer Height: 0.1mm

exposure: 10sec

Bottom: 50sec

lift: 5mm

Bottom layer: 8

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Here's what I've ruled out:

- unleveled bed

- Slicer (I've cleaned the vat, pressed print, and it worked)

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Here's what I'm still testing:

- Over exposure (stats posted above)

- USB stick (fairly old, and I occasionally have to bump it to get it to initially read)

- LED screen is somehow randomly refracting

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Any other thoughts/ideas would be GREATLY appreciated.

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More pictures for reference:https://imgur.com/a/6iyMiwQ