... function of this screen is exact showing the toolpath, controllingthe spindle speed and cool on/off.2) MDI screen-in this ... , the box contain four driver that controlthe stepper motor, the speed of the spindle, spindle CW/CCW, the limit switch,the flood cool ... exact leadscrew 3) Smart outlook and operate easy4) High exact spindle motor and easy to control the spindle speed with variable speedadjusting