Adjust the phase angle, you need to loose bottom frame then move to one side. You will see vibrating motor in the machine body, remove vibrating motor carefully, loose the eccentric block retaining bolt. According to the dial on the motor to adjust the phase angle, then put back the motor, tighten the bolt. There is another method: Adjust the additional weight on vibration motor (next to eccentric block). This will increase vibration force so as to achieve screening effect.
