Place the longest motor slide on the bottom panel as shown in the image below. Make sure the motor is at the back side. Fasten the slide to the panel using four M4 screws and hex nuts.
Place the Y Gantry Base on the slide as shown in the image below. Fasten the base to the slide using four M3 screws.
Place the smaller motor slide on the 3D printed part as shown in the image below. Make sure the motor is at the left side. Fasten the slide to the panel using four M4 screws.
