FYSETC 3D Printer Parts Ender5 Direct Drive Extruder Kit Aluminum Alloy Mounting Extruder Adapter ender5 Ender5 Pro Ender 5 Plus 1.Print model download link: https://www.thingiverse.com/thing :4813366 2. to replace the double gear extruder, the direction of the motor and the extruder pulse shall be modified according to its own machine: First, the method of motor direction modification: 1) Firmware changes the direction of the E0 motor: // For direct drive extruder v9 set to true, for geared extruder set to false. #define INVERT_ E0_ DIR false 2) Change the line sequence of motor Two interchanges in the middle and two on the side Second, extruder pulse 1) Firmware modification extruder pulse: #define DEFAULT_ AXIS_ STEPS_ PER_ UNIT { 80, 80, 400, 146 } 2) Send G code (can be sent by slicing software command): M92 E146 M500