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I am not so new to 3d printers. Last year i had the opportunity to work with one at school and now looking to buy my own. I've looked and decided on the UpTwo printer. I know what to expect with the...

OK? but didnt answer my question, should be more clear.
Do you need a special printer to make these moveable parts or will abs work?
Also how can you design these?

So I've seen videos of parts like baring and "impossible prints" where they print their part and chip some supports away and it moves seemlessly. Just wondering if its a special printer like resin ...