Belden HIRSCHMANN iFLEX2 + iSCOUT expert compact - 8 Slewing Sensing

Service Manual iFLEX2 with iSCOUT expert compact
16 50 650 69 0101E_REV D (GROVE RT-TM).DOC / Rev. D / 2015-11-20 / JPD
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.
Modular Slew Pot - Voltage on Service Screen
The converter board is supplied with
12V from the central unit.
The potentiometer and the board
output two signals between 4 and
20mA that go to the central unit. You
can measure them at the 12-pin crane
interface connector.
ANGLE
(deg)
SL ANG 1
(mv)
SL ANG 2
(mv)
0.0
717
2161
30.3
1174
2645
60.0
1680
3150
89.9
2158
3595
120.1
2641
3141
150.1
3144
2639
180.0
3595
2161
-150.1
3144
1681
-120.1
2642
1180
-90.0
2160
718
-60.1
1681
1168
-30.0
1172
1680
0.0
718
2161
iFLEX2
CU
Slip Ring Assembly
Slew
Potentiomet
er with (2)
outputs
Current
Converter
Display screen for sensor inputs
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