TIC Liner 3000 with Communicator Electric System Description of function: To control the automatic functions, the electronic unit monitors: - the drive speed - the position of the rotor arms' hydraulic cylinders Rotor position sensors B121 The rotor position sensors are integrated in the hydraulic cylinders as contactless position measuring sensors. A spindle with a steep thread inside the hydraulic cylinders rotates a signal generator. The angle of rotation between the retracted and the extended cylinder position is The signal generator emits a magnetic field to the sensor electronic unit located opposite of it.
The position of the magnetic field which corresponds to the hydraulic cylinder position is detected by the sensor electronic unit. The sensor electronic unit transmits a pulse-width modulated signal (PWM, corresponding to the hydraulic cylinder position) to module A 20. With the hydraulic cylinder retracted, this signal is 5% and with the cylinder extended, it is 95% PWM. See also the Technical Systems / Hydraulic system documentation. Offset of rotor position sensors B 121 The position "Hydraulic cylinder retracted" must be programmed in the sensor electronic unit (= sensor offset). This programming changes when the ram rod of a hydraulic cylinder is rotated, e.g. during service work.
For offset programming, the sensor signal output must be connected to the 12 V sensor supply voltage for at least 2 seconds. The CCU module carries out this offset programming during each basic initialisation. This is done by the diode component D.1-4 and amplifier V16-2. This is detected at terminal A30. When the basic initialisation is carried out, a cylinder position of 100% and then of 5% is displayed for a short time when in transport position (cylinder retracted). When a hydraulic cylinder position which is illogical to the electronic unit is detected, e.g. due to service work, an error is reported.
In order to remove the error, the operator may move to transport position or carry out a basic initialisation. The PWM signal from sensors B121 is also displayed as cylinder position on terminal A30. This involves slight deviations: 90% signal change = 100% change of display on terminal A30. Approach transport position program If the drive sensor B9 detects a signal change (universal drive shaft is rotating), approaching the transport position in automatic mode is not possible. Adjustment of drive sensor B9 Sensor B9 is set to a clearance of 3-4 mm from the outside profile of the drive shaft. 12/03 Lin-08-el. 08a-7