ATLET A-Ergo, Service Manual

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ATLET SERVICE MANUAL A-ERGO ATLET SERVICE MANUAL A-ERGO
S Stte ee erriin ng g / / D De es siig gn n a an nd d ffu un nc cttiio on n / / G Ge en ne erra all 7 7..3 3
Edition 2002B Edition 2002B
7 Steering 7 Steering
Design and function Design and function
General General
The steering movement The steering movement is transferred completely electronically, without mechanical is transferred completely electronically, without mechanical
connection between the steering wheel and wheel. The system consists of steering wheel, connection between the steering wheel and wheel. The system consists of steering wheel,
regulator, steering servo unit and servo motor. A monitoring system is
regulator, steering servo unit and servo motor. A monitoring system is built into the built into the
steering servo unit, which stops the truck if an electrical fault occurs in steering servo unit, which stops the truck if an electrical fault occurs in the regulator the regulator..
Steering Steering
The steering wheel is mounted in a vertically adjustable panel to allow t The steering wheel is mounted in a vertically adjustable panel to allow the best possible he best possible
adjustment. The steering wheel has no mechancial contact with adjustment. The steering wheel has no mechancial contact with the wheel. All the the wheel. All the
steering takes place by means of a sensor in the form of a steering takes place by means of a sensor in the form of a step motor under the steering step motor under the steering
wheel. The sensor gives a wheel. The sensor gives a signal to the signal to the servo steering regulator, which converts the signal servo steering regulator, which converts the signal
to a drive voltage for the steering servo motor to turn to the right or lef to a drive voltage for the steering servo motor to turn to the right or left, depending on the t, depending on the
direction of rotation of the steering wheel, see section 10. direction of rotation of the steering wheel, see section 10.
The steering servo motor is The steering servo motor is of the 3-phase induction motor type. of the 3-phase induction motor type. The turning movement The turning movement
is limited by is limited by means of two limit s means of two limit switches, S4 and S5. These are placed in the motor witches, S4 and S5. These are placed in the motor bed bed
and stop the turning and stop the turning movement before the mechanical end stop is movement before the mechanical end stop is reached. reached.
T To maintain control of o maintain control of the acceleration during hard turns there the acceleration during hard turns there is also a 45° is also a 45° sensor sensor, S8, , S8,
on some trucks, placed in the motor bed.. on some trucks, placed in the motor bed..
Figure 7.1 Figure 7.1 Limit switch S4 and S5. Limit switch S4 and S5.
07_004_SM_A-Ergo_S4S5S8.eps 07_004_SM_A-Ergo_S4S5S8.eps
S4, S5 S4, S5
S8 S8
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