Stewart Filmscreen
– Cabaret
30
LIMIT SWITCH ADJUSTMENT____
Stewart Filmscreen uses tubular Somfy motors in many of our 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 also use an electrician’s 1/8
th
inch flat
blade screwdriver.
Note:
Never use an electric drill or powered screwdriver 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) incremental adjustment only.
ADJUSTING THE
SCREEN’S DEPLOYED (DOWN) STOPPING POSITION
This is the number one adjustment that users may need to make. A projection screen may require
that the deployed stopping position, the
“White” switch, be readjusted from the factory setting.
This
adjustment will be made using the “White” limit switch (see Figure 35). It is important to
remember that you cannot reduce the screen’s deployment setting when the screen is currently
stopped at its full
“down” setting. You must use the control switch to raise the screen up a foot or so
before
attempting a motor limit switch adjustment. If the screen is operated by a screen trigger, you
must reduce the
“White” limit switch when the screen is stopped in its fully retracted, “up” position.
Turn the
“White” motor limit switch clockwise to reduce top masking settings.
Turning the motor limit switch counter
clockwise will increase or extend the screen’s deployed
stopping position. Switches are sensitive. Go slowly and do quarter turns at all times with the 5/32
”
hex driver to prevent damage to the motor and to the screen.
Do not extend the screen so far
that the aluminum roller tube becomes exposed.
There must be at least one full wrap of the
screen left on the roller tube when the screen is resting at its final deployed setting.
If you
turn the limit switch too much (clockwise) and the screen is now stopping short of where you want it,
simply turn it in the opposite direction (counterclockwise) and the screen will automatically drop in
increments as you rotate the switch.
⚠
CAUTION
Improperly adjusted motor limit switches can result in irreparable damage to
the projection screen or motor and will void your warranty.
