Da-Lite Pro Imager Horizontal Masking System - Manual (Page 6)

6
Adjustment
Masking travel is stopped automatically in the up and down positions by limit switches that are properly adjusted at the factory.
Should it be necessary to adjust the stop positions, proceed in the following manner using a small flat screwdriver or a 5/32"
allen wrench. Access to the switches is provided by holes on the top left side of the Pro Imager. Refer to Figure 4.
Up Limit Control
The up limit controls the stop position when the mask
is traveling up, or unmasking the screen. Set the Pro Imager
to the down, or masked position. Turn the up limit control
Clockwise to Decrease the up travel. Turn it Counter-
Clockwise to Increase the up travel. Turn the control a
quarter turn at a time and then run the Pro Imager to check
the stop position. Repeat the above steps until the desired
position is reached.
NOTE: The bottom of the slat bar should be no more than
1/8" above the edge of the frame while in the up position.
See Figure 2.
Down Limit Control
The down limit controls the stop position when the mask
is traveling down, or masking the screen. Set the Pro Imager
in the up position. Turn the down limit control
Clockwise
to Decrease the down travel. Turn it Counter-Clockwise to
Increase the down travel. Turn the control a quarter turn at a
time and then run the Pro Imager to check the stop position.
Repeat the above steps until the desired position
is reached.
Up Limit
Control
Viewing
Surface
Down Limit
Control
Figure 4