Hitachi RAS-18SX8 Manuel De Maintenance page 137

8. Stepping motor drive circuit
Lateral vane, left
Lateral vane, left
Lateral vane, left
Lateral vane, left
Lateral vane, right
Lateral vane, right
Lateral vane, right
Lateral vane, right
Vertical vane, small
Vertical vane, small
Vertical vane, small
Vertical vane, small
Vertical vane, big
Vertical vane, big
Vertical vane, big
Vertical vane, big
[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
φ4 terminal
φ3 terminal
φ2 terminal
φ1 terminal
・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.
Downloaded from www.Manualslib.com
Microcomputer
Ⅰ Ｃ601
Front panel − φ4
86
Front panel − φ3
85
Front panel − φ2
84
Front panel
− φ1 83
− φ4
80
− φ3
79
− φ2
78
− φ1 77
− φ4
76
− φ3
75
− φ2
74
− φ1 73
− φ4
28
− φ3
27
− φ2 26
− φ1 25
− φ4
24
− φ3
23
− φ2 22
− φ1 21
5 ms. or 10 ms.
Fig. 8-2
manuals search engine
12V
Driver IC
Fig. 8-1
– 170 –
Ｃ Ｎ18
12Ｖ
1
φ4
2
φ3
Ｍ
3
φ2
4
φ1
5
Front panel motor
Ｃ Ｎ12
12Ｖ
1
φ4
2
φ3
Ｍ
3
φ2
4
φ1
5
Lateral vane motor, left
12Ｖ
6
φ4
7
φ3
Ｍ
8
φ2
9
φ1
10
Lateral vane motor, right
Ｃ Ｎ １ ５
12Ｖ
1
φ4
2
φ3
Ｍ
3
φ2
4
φ1
5
Motor for vertical vane, small
12Ｖ
6
φ4
7
φ3
Ｍ
8
φ2
9
φ1
10
Motor for vertical vane, big