Citizen Systems CBM-710/720 service manual Cutter Control Circuit, Normal Reverse Stop

CBM-710/720 Service Manual

4.Cutter Control Circuit

Cutter Side

X

Y

S

Fig. 4-1 Cutter Control Circuit

The cutter control circuit is as shown in Fig. 4-1. In the cutter side, M indicates the motor and S the home switch. The motor can make forward and reverse rotation by controlling X and Y inputs of the control circuit as shown in the table below.

	Normal	Reverse	Stop	Stop
X	H	L	L	H
Y	L	H	L	H

The timing chart is provided in Fig. 4-2. The rising of S when the motor makes forward rotation is the home position, where the motor stops. For full cut, the blade returns to the home position with only forward rotation of the motor after turn-around. For partial cut, on the way of cut after forward rotation of the motor, make reverse rotation to return the blade. Then stop the blade at the home position by making forward rotation again.

1) Full Cut 2) Partial Cut

1 mS 1 mS

XX

YY

SS

15 mS

Fig. 4-2 Timing Chart

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