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REVERSING AUTOMATIC DOCUMENT FEEDER (RADF)
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15.4.2 Electric circuit description
[A] Original feed motor control circuit
Fig. 15-5
This circuit controls the rotation/stoppage and the direction of rotation, excitation mode and motor
current of the feed motor. The speed and direction of the motor rotation can be controlled by inputting
the drive clock signal (FMOT-CLK) and rotation direction signal (FMOT-CW). When the level of the
enabling signal (FMOT- ENB) is set to “L”, the motor current is turned OFF regardless of the state of
other signals. Either the 2 phase excitation or 1-2 phase excitation can be selected by the excitation
switching signal (FMOT-MD1). The edge switching signal (FMOT-MD2) is used to specify the switching
timing for excitation phase either from when both the rising and decay edge of the CLK input are
detected or when only the rising edge is detected. The motor current value can be set discretionary by
changing the level of the reference setting signal (FMOT-REF).
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