If you use D9 for the fan, see my earlier note on this same thread. Using the files at Blomker, you actually have to know what you are doing, it's not plug and play. You have to make sure the arm's length, end switches (TRUE or FALSE), stepper motor speed, etc are properly entered. Otherwise, this could take you hours to configure and tweak. Also the files for Repetier and Marlin are different. Iby grisina - Delta Machines