Round printing

If I draw a wheel, normely round, and I try to print in 3 d, I get not really a round wheel but it is round with many corners? I use the basic of the program. The prof works well with a higher resolution?

Hi - High-resolution STL exports work better. You can start a trial for the Pro which allows you export high-resolution STL files. The trial can be canceled anytime.

Dank u Wel! Thank you for your reply!