Washing Machine Diagram / September 5, 2018 / Kyleigh Oglesby.
When an unbalanced condition occurs, the switch closes the circuit to the switch in the off-balance position. This removes electricity to all the washer's functional parts, stopping the cycle and thus avoiding a costly repair. The user then must redistribute the load more evenly in the washer tub, pull the timer dial out to de-energize the solenoid, and allow the switch to rest, and the push the timer dial in. This again closes the circuit to the normally active parts of the washer and washing machine.
Because they're not externally adjustable, they don't need to be located close to the control panel. Depending on your application, you might want your salvaged pressure switch to operate at pressures that are different to its standard range. That's not hard to do if you have a washing machine pressure switch, as they are quite easy to modify.In standard form, turning the adjustment control typically allows the trip pressure to be set to detect water depths anywhere from 9cm to 20cm. But if you remove the adjustment.
Most appliance manufacturers have now found it advantageous to employ a small switch or micro-switch, to stop the spin action. An actuator protruding from the lid of the automatic washer causes the switch to open before the lid is raised 2 inches. Electrical, either type of spin-stop lid or door safety switch is usually connected to wires between the spin solenoid and the timer. In this way, when the operator raises the lid during spin, the switch opens and the timer circuit to the spin solenoid is broken. By keeping the actuator clean and free of debris, you can avoid unwanted appliance repair service calls.
The motor cannot be reversed instantly. It needs a brief pause between switching directions, or else it may get damaged. For this purpose, another spin direction control timer (IC2) is employed. It is realised with an IC 555. This timer gives an alternate ‘on’ and ‘off’ time duration of 10 seconds and 3 seconds, respectively. So after every l0 seconds of running (either in clockwise or anticlock-wise direction), the motor stops for a brief duration of 3 seconds. The values of R3 and R4 are calculated accordingly.