Hirschmann PAT IFLEX5 - Slewing Sensing

Service Manual iFLEX5
© Hirschmann Rev. I 0522/17 190154_I.DOC
12
8 SLEWING SENSING
The system measures the slewing (rotational position) of the crane’s upper with a slewing sensor. The
slewing sensor is contained within the slip ring assembly.
Block Diagram
The slew potentiometer has two potentiometers built in that are driven by the slip ring axle. As the
slewing angle changes, so will the axle and with it the potentiometer’s outputs. Use the display screen
by pressing ‘i’ (info) twice to show all sensor inputs.
The table to the right show measured millivolt reading for
the slew potentiotmeter.
0
500
1000
1500
2000
2500
3000
3500
4000
0 45 90 135 180 225 270 315 360
SLEW ANGLE
MILLIVOLTS
Potentiometer 1
Potentiometer 2
0 45 90 135 180 -135 -90 -45 0
ANGLE
(deg)
SL ANG 1
(mv)
SL ANG 2
(mv)
0
717
2161
30.3
1174
2645
60
1680
3150
89.9
2158
3595
120.1
2641
3141
150.1
3144
2639
180
3595
2161
-150.1
3144
1681
-120.1
2642
1180
-90
2160
718
-60.1
1681
1168
-30
1172
1680
0
718
2161
iFLEX5
CU
Slip Ring Assembly
Slew
Potentiomet
er with (2)
outputs
Current
Converter
Modular Slew Pot - Voltage on Service Screen
Display screen
for sensor inputs