1. First, plug the power of the engraving machine into the power supply, and insert the plug of the suction valve handle of the engraving machine into the slot of the engraving machine.

2. Next, press the switch on the handle of the engraving machine's suction valve to turn on the engraving machine. The engraving machine will start working after it sucks the handle of the valve.

3. Then the engraving machine suction valve handle can control the speed, direction, steepness, etc. of the engraving machine movement. Users can freely adjust it according to their own needs.

4. After final use, turn off the switch on the suction valve handle of the engraving machine, adjust the slot of the engraving machine, and unplug the power supply.