Description Of Circuit; Drive Circuit For Feed Motor - Toshiba MR-2017 Service Manual

3.4

DESCRIPTION OF CIRCUIT

3.4.1

Drive Circuit for Feed Motor

3
Fig. 3-8
This circuit controls the rotation/stoppage and the direction of rotation, excitation mode and motor cur-
rent of the feed motor.
A drive clock signal (FMOT-CLK) and rotation direction signal (FMOT-CW/CCW) are input to control the
speed and direction of the motor rotation.
When the level of the enabling signal (FMOT-Enable) is set to "L", motor current is turned OFF regard-
less of the state of other signals.
For the excitation mode, either of 2 phase excitation or 1-2 phase excitation can be selected using the
excitation switching signal (FMOT-Mode1/FMOT-Mode2).
The edge switching signal (FMOT-Mode3) is used to specify the switching timing for excitation phase
either from when both the rise and decay edge of the CLK input are detected or when only the rising
edge is detected.
Motor current value can be set discretionary by changing the level of the reference setting signal
(FMOT-REF).
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DESCRIPTION OF OPERATIONS
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