Luxus
17
HOW TO ADJUST PROJECTION SCREEN MOTOR LIMIT SWITCH-
ES (SCREENS WITH STI100 ONLY)
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CAUTION
Please read and understand the following information Improperly adjusted motor limit switches can
result in irreparable damage to the projection screen or motor
These instructions refer to screens equipped with the STI 100 control unit only For screens with RTS
motors please refer to the RTS programming section
Stewart Filmscreen uses in tube Somfy motors in many of their projection screens Users may require
adjusting the limit switches at some point in time
Tool required: 4 mm hex key or 5/32” hex driver You can even use an electrician’s 1/8th inch flat blade
screw driver (tweaker)
Never
use an electric drill or powered screw driver to adjust Somfy motor limit switches as this will
damage the internal timing assembly in the motor The switches are designed for manual (by hand) ad-
justment only
ADJUST SCREEN’S DEPLOYED (DOWN) STOPPING POSITION
This is the number 1 adjustment that users will need to make A projection screen may typically require
the deployed stopping position to be re-adjusted from the factory setting
On recent Somfy motors this adjustment will be made using the “white” limit switch (see Fig 1 on next
page) On older type motors (with two white switches) this would be the switch marked #1 It is import-
ant to remember that you can not reduce the screen’s deployment setting when the screen is currently
stopped at its full down setting You must either use the control switch to raise the screen up a foot or so
before attempting a switch adjustment Or what? If the screen is operated by a screen trigger, you must
reduce this “white” limit switch when the screen is stopped in its fully “retracted” up position
Turn the “down” limit switch “clockwise” to reduce settings Turning the switch “counter-clockwise”
will increase or extend the screen’s deployed stopping position Do not extend the screen so far that
the aluminum roller tube becomes exposed There must be at least one full wrap of screen left on the
roller tube when the screen is resting at its final deployed setting If you turn this limit switch too much
(clockwise) and the screen is now stopping short of where you want it, simply turn it in the opposite
direction (counter-clockwise) and the screen will automatically drop in increments as you rotate the
switch