Hitachi RAK-15QPC, Service Manual

Page: 59 / 90

[Connector circuit waveform while the motor runs]
Voltage waveforms of different phases as viewed from
the OV line while the motor rotor is turning counterclockwise
as viewed from the shaft side
¶ 4 terminal
¶
3 terminal
¶ 2 terminal
¶ 1 terminal
5 ms. or 10 ms.
Fig. 12-2
·
Each stepping motor runs as excited in 1 or 2 phases at 100 PPS or 200 PPS.
·
The excitation pattern passes the microcomputer (IC601) and then the driver IC and excites the coil of each stepping motor.
Vertical vane, left ˉ¶
Vertical vane, left ˉ¶
Vertical vane, left ˉ¶
Vertical vane, left ˉ¶
Lateral vane ˉ¶
Lateral vane ˉ¶
Lateral vane ˉ¶
Lateral vane ˉ¶
Microcomputer
Fig. 12-1
9
9
&1
&1
9
,&
¶
¶
¶
¶
¶
¶
¶
¶
0
0
12. Stepping motor drive circuit
61
60
59
58
Horizontal sweep motor
Vertical sweep motor
· Some models not need to install the horizontal sweep motor.
59