Last Updated on 7 April 2021

After pushing a selection button this cycle starts . . .

The carriage assembly B will move along the selector unit, until it hits a selection lever A , which has been put aside while selecting a record.

When the contact (B) in the carriage assembly hits (i.e. is grounded by) a selector lever, an interlock release contact will now change the current from the magazine motor to the gripper motor.

The gripper mechanism will now pick the record from the magazine and put it on the turntable.

Once this gripper arm has reached his rest position, it will close the circuit to the “selection lever reset solenoid” which puts back the selection lever with a spring plunger (A).

But let’s also pay some attention to the proces “under the hood”:

As the grippermotor A is activated, it will put the gripper drive shaft B to turn. This will activate the Geneva gripper plates  C, which in their turn will first activate the gripper mechanism D, and then the tone arm F.

The direction of the gripper arm, odd or even, is directed by the track roller in the magazine shaft, which is connected to the gripper mechanism with a rod F.

Cam switches G: one is for breaking the interlock trip coil, gripper motor and selection lever reset solenoid circuits, and the other completes a circuit to the interlock release coil.

Information is copied from www.kuijs.net/rock-ola