1. Adjust the upper regulator according to the height of the powder box. The upper pole plate cannot press the powder box, the distance is about 3mm to 5mm, away from the top of the powder box.
2. If adjusted too low or even press the powder box: it will cause the cover closing abnormally, and the water vapor during baking cannot be exhausted out.
3. If adjusted too high, the baking time will be prolonged, affecting work efficiency.