Adapter with screw terminals Adapter with screw terminals, connect the controller to your motor drivers with screw terminals. Works with all Planet CNC controller versions. Compatible with the following CNC USB Controllers: CNC USB Controller Mk3 ( 4 ) axis CNC USB controller Mk3 ( 9 ) axis CNC USB controller Mk3ECO ( 4 ) axis CNC USB controller Mk3DRV ( 4 ) axis