Frymaster 45 Series manual Bell Crank Basket Lift Simplified Schematic

product button is pressed, the timing circuitry activates a coil in the basket lift relay to supply power to the motor.

There are two types of basket lifts: the “bell crank” design, and the “modular” design

A bell crank basket lift consists of a cam and bell crank that are connected to the basket lift arm by a flat metal link. The cam is attached to a drive motor. The motor rotates the cam, thus raising or lowering the lift arm linked to the bell crank. A roller-activated microswitch is used to limit travel. When the push-button in the manual timer or the product button for computers is pushed, the motor circuit is com- pleted and the motor runs, lowering the bas- ket. When the roller in the microswitch makes or loses contact with the cam, the switch is reversed and power to the motor is cut. At the end of the specified cooking time, the timer/controller reverses its switch posi- tion so that the motor circuit is again com- plete. The motor runs, raising the basket, until contact with the cam is again made or lost.

Left bell crank and cam with basket lift link shown in the down position. Note the microswitch in the upper right corner.

Bell Crank Basket Lift

Simplified Schematic

LEFT BASKET	RIGHT BASKET
LIFT TIMER	LIFT TIMER
C	C
TM	TM
NO	NO

L

NC

H

N

NC NO

C

LEFT

MICROSWITCH

M

LEFT BASKET

LIFT MOTOR

L

NC

NC NO

C

RIGHT

MICROSWITCH

M

RIGHT BASKET

LIFT MOTOR

When the timer button is pushed, the NO circuit in the timer is closed, supplying voltage through the microswitch to the motor. The bell crank/cam rotates until switch postition in the microswitch is reversed, stopping the motor with the basket in the down position. When the timer reaches zero, the the switch in the timer reverts to the NC position. This supplies power to the motor via the microswitch. Once again, rotation of the bell crank/cam eventually causes the microswitch to reverse itself, stopping the motor with the basket in the up position.

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