Stewart Filmscreen Corp 4-Way ScreenWall ElectriMask - Manual (Page 20)

18 Stewart Filmscreen Corporation
Modifying the extension of the mask
You can increase the extension of a mask up to 3" / 7.6 cm past the factory
preset stop, or you can decrease the extension from the factory preset stop.
Do not attempt to modify a mask extension beyond these recommended
amounts.
The limit switches are located on the head of the motor and can be
accessed through openings located on the left side of the frame, as shown
in Figure 15.
Horizontal mask units have limit switches at the top and bottom of the
frame, a set for each roller tube.
To increase a mask's fully extended (mask down) stop position:
1. Lower the mask to its current stop position.
2. Locate the down limit switch(es) located on the left side of the
frame. Refer to 2, 4, or 5 as appropriate in Figure 15. Use a
screwdriver to turn the switch in a counterclockwise direction. If
the power is on, the mask will drop incrementally as the switch is
turned.
Note: One complete turn of the switch will make approximately a
1/2" / 1.3 cm change in the mask’s stop position.
To decrease the mask extension:
1. Lower and stop the panel when it is extended about halfway
down.
2. Locate the down limit switch(es) located on the left side of the
frame. Refer to 2, 4, or 5 as appropriate in Figure 15. Use a
screwdriver to turn the switch in a clockwise direction.
Note: One complete turn of the switch will make approximately a
1/2" / 1.3 cm change in the mask’s stop position.
3. Activate the mask in the down direction until it reaches the newly
reduced stop position. Repeat this procedure until the desired
stop position is reached.
Once you have made the adjustment, whenever you lower the mask, it will
automatically stop at the new position.
Note: It is recommended that you make a note of any changes made to the
factory preset.
Figure 15: DOWN limit switches
are 2, 4, and 5.
Screen
Horizontal Mask
Horizontal Mask
Vertical Mask
Warning
The UP limit switch(es) retract the batten(s) further into the
unit. Adjusting them is not advised. Refer to 1, 3, or 6 as
appropriate in Figure 15.
1
2
3
4
5
6