Delta Printer Home and Step Issue

Hello there,

I managed to build my first delta printer but i have issues with it. First one is I calculated my steps per mm 80 in prusa calculator (And I quadruple checked it) but it turns out that it should be 160 in order to prints have correct scale otherwise they are 2x Smaller. Second issue is when I try to home my printer it rises on the z axis as expected but then stops and shake really hard then move up a bit again and stops without touching the endstops. (And yes all enstops are in correct position relative to their axes)

Hope you guys can help.

P.S. I put my config file it might help you to understand my issue. Thanks.

Your steppers are probably 0.9° types instead of 1.8°, hence the 160 steps/mm. Or your drivers run in 1/32 microstepping ( DRV8825) instead of 1/16?

what happens if the printer is only a few mm from the endstops? You may have the wrong z height (but that may be fixed with the proper steps/mm) The printer wont want to move further than the length of the Z while homing