What is the disadvantage to having the motors being stationary on a belt driven cnc vs hauling them around? All the designs using timing belts I am seeing have the motor on the moving gantry. On my 3D printer I am using v-slot and have the motor on rear of the extrusion with both ends of the belt attached to the build plate. I realize the load is much less on the 3D printer but is there a disadvantage to having the motor stationary? I have worked with other much larger belt driven machines (flatbed inkjet) that do it this way. I am just thinking it may be better to not be hauling around the 12 pounds of motors.