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I am trying to print a box shaped object with an ELEGOO Mars SLA printer. I positioned the piece rotating it on X and Y axis 35 and 30 degrees. However, the print fails because the piece does not stick to the supporting structure (see picture).

Do you think that it could be a problem of the piece sticking to the display due to overexposure or deteriorated film? Or is it something else? I tried two prints, lowering the exposure time from 8 to 6 seconds, the second print still failed but at least the piece is not totally stuck to the display.

Any other idea?

First failed print with 8 seconds exposure: the film was completely jammed and all the resin was stuck there (this is why there is no piece on top of the supporting material) First failed print

Second failed print with 6 seconds exposure: the film was perfectly clean, but the object did not stick to the supporting materials therefore collapsing. Second failed print pic1 Second failed print pic2

This is the 3D drawing 3D drawing

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    $\begingroup$ I think I have found the solution: it has to be printed up side down to prevent the “suction cup” effect $\endgroup$
    – user3161330
    Mar 8, 2020 at 16:38

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I have tried to print the piece upside-down with the cave part facing down and it worked. Since the printer prints upside down, positioning the cave part facing up creates a suction-cup effect on the printer display that makes the whole structure stick to the lcd and detach from the supporting structure, thus making the print fail.

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  • $\begingroup$ Update: even better solution is to print sideways. I tried to print a cylindrical shape with a hole in the middle that stops halfway (more or less like a glass or a cup, but with thick walls). The only successful way of printing it was to lay it sideways. $\endgroup$
    – user3161330
    Mar 10, 2020 at 15:03

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