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12.
IMPORTANT: Installation check!
Values for tape tension and offset between tape and sensor are guidelines based on experience. But in
any case, a proper check after installation is mandatory. It must absolutely be avoided that the magnetic
side constantly grinds on the sensor body during operation. Run an inspection trip along the complete
shaft. Observe the system and pay attention to the respective positions of band and sensor. You have
achieved an optimal installation if the steel side of the tape is constantly pressed slightly against the poly-
mer guide of the sensor. At some points in the shaft also double-check on the bottom side of the sensor.
If the sensor is tilted it may look good on top but the tape can still grind along the bottom edge of the
sensor.
Figure 14: Assessment of the vertical alignment of the sensor
13.
If the installation-check reveals that the tape slides on magnetic side, start to increase the offset between
sensor and tape. Values of up to 5 cm are acceptable. If this measure does not solve the problem it is
very likely that the tape is not plumb in the shaft. This is easy to check for, provided your elevator control
allows for inspection trips without the absolute position signal: Just take the tape out of the sensor and
run an inspection trip along the shaft. Observe the distance between sensor and tape along the travel.
Misalignments will become obvious.
Also ensure that the tension on the tape is sufficient. A loosely tensioned tape will hinder proper guiding.
14.
After completion of the installation clean the tape. Beginning at the top of the shaft drive down the com-
plete travel distance pulling the magnet tape through a dry clean cloth.
Please observe and follow the instructions in the note boxes on the next page!
Recommended
- 22 -
Installation and First Start-Up
Falsche vertikale
Ausrichtung
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