Landing/Positioning System
2-69
2
Motion 4000
Installation
This kit is configured to mount the sensor head on the left side of the rail (as you face the rail
blade). If necessary, you can change this to right side mounting. Please refer to “Left to Right
Rail Side Reversal” on page 2-78. Tape hangers are steel channels that clamp across the back of
the car rail using forged rail clips. The tape hangs directly from the top hanger and connects
through a tensioning spring to a switch pivot on the bottom hanger. With the tape properly
hung, spring tension keeps the pivot held against the switch, keeping it closed. If tension is lost
due to a tape failure, the switch will open the safety string and bring the car to a stop.
1. Attach top and bottom hangers to the rail lightly using clips and hardware provided.
2. Use a tape measure to adjust the hangers to provide equal offset from rail edge to encod-
ing tape. Tighten the retaining hardware.
Figure 2.25 Tape Hanging Hardware
Tape switch
tape end clamp
inner plate
is tapped
Sensor mounting kit
Sensor
Springs
Initial tape offset adjust
Initial tape offset adjustFine tape alignment adjust
Fine tape
alignment adjust
Screw heads this side
Springs assist in keeping the tape
aligned. If you see that the springs
are twisted, check that the tape and
the sensor head are properly
aligned.
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