Hi,I just bought a delta printer and it is not printing properly. I tried printing a test rectangle and the print curls up. They dont stick to the base.It might be printing a bit in the air. I did auto leveling on my printer but still the prints are not nice. My printer is this “flsun 3d kossle delta printer”

Also when I kill the print in between the extruder goes and hits the belt rods and the motor makes lot of nice after hitting the frame and the belt. How do i stop this from happening. I know these startup troubles will be there with my new printer.So how do I set it up and calibrate it right?