1. W stands for rising, S stands for falling, A stands for left tilt, and D stands for right;
2. Keypad 4 and 5 are for turning the machine head left and right, 9 and 6 are for forward and backward;
3. Keep pressing 6 to lift the machine head, not too high, otherwise it will fall straight down;
4. Use AD to control steering. The difference here is that you have to press W all the time.