Startup - Inspection Operation
3-14 Manual # 42-02-1P21
LS-EDGE Broken Tape Switch
The normally closed contacts on the Broken Tape Switch are used to detect a broken tape condi-
tion. The switch is mounted backwards for protection during shipment. Remove it and mount it
as shown in page 3-13. Position the switch so that the cam on the tensioner activates (opens) the
switch when the tensioner is at the bottom of its travel (no tension). Note that switch position
should be adjusted so that the switch is activated by the cam but not so close that the switch is
held against its mechanical stops. The switch closes at approximately 50% of travel.
Hanging the Tape
Work from the cartop to hang the tape from the top hanger and allow it to unroll slowly as you
move the car down the hoistway. It is best to allow the tape to hang and straighten for at least
24-hours before attaching it to the bottom hanger.
Tape Tension The tape is tensioned according to compression of the bottom tape mount
spring. The tension gauge provides visual indication of low, medium, and high tension posi-
tions. Short runs, up to five floors will generally be acceptable at the low tension position. Runs
to 15 floors will generally be acceptable at the medium tension position. Longer runs may
require the high tension position but you should start out with the medium setting first.
Tape tension is intended to reduce noise caused by tape vibration at contract speed. Generally,
you want to use the lowest tension setting that maintains a quiet tape at contract speed.
LS-EDGE Sensor Installation
Tape guide side pieces easily detach so the sensor can be slipped onto the steel tape.
Figure 3.5 Sensor with Guide Sides Removed
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