Elastic Resin Prints 10% larger. in XY Direction on Form 2


#1

Hi All,

I printed a thin 1.5mm Thick 52mm square object on my Form2 using the Elastic Material. I am wondering if the software does a ~10% increase in XY Dimensions to allow for shrinkage. My part printed about 10 mm larger than what I was expecting in the XY direction. Maybe after a proper curing it will shrink by 10%. Is this the expected behavior for the Elastic Material?

Maybe I scaled the part unintentionally in preform. Will try another print soon.

-Angel


#2

Elastic isn’t intended for as high dimensional accuracy as other Formlabs resins, but a 10% difference seems farther off than I’d expect.

Did you print it right on the build platform, or on supports, and did you measure it before or after washing and post-curing?

Also, note that thin parts (1.5mm thick probably counts) may be more subject to swelling when they’re soaked in IPA, so you might want to wash a part like that for a shorter amount of time.


#3

It was printed on the build platform. Initial measurement was after washing and post curing. The print was measured again after two days and now the expansion went down to 4% instead of 10%. I assume the percentage expansion is also affected by the dimensions of my part. Perhaps if my part was twice the size in XY, the percentages would be half of what I am measuring now. I printed myself a mold using clear v4 and went back to resin injection casting, which, although not perfect, gives me better accuracy. Thanks for your response.

Best,
Angel


#4

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