Flip Z axis part

I printed several part with Form 2 printer, I found that to have a right print before printing I have to flip the Z axis, like make the the part mirrored
Is this right or do I’m making something wrong?

Thank you

Do you mean printing the part up side down? Maybe you can provide us with some pictures so we can understand the problem better.

I’ve seen this behavior too. Once or twice I printed an object only to discover it was the mirror image of what should have been printed. It’s a function of the software I was using to export the STL, not PreForm. I don’t remember what I started doing differently to fix it, but I did fix it. But I also learned to check left/right-ness in PreForm before I send the model to the printer…