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SETTINGS AND ADJUSTMENTS
SECTION 4-31
Setting and Adjusting the Cradle Jackscrew
(continued from previous page)
Actuate the screen cradle jackscrews by turning the selector switch to
LOWER at the jackscrew console.
Hold the switch in position until the cradle approaches the open stop
location described previously. TO AVIOD SERIOUS DAMAGE TO
THE JACKSCREW. STOP THE JACKSCREW MOTOR AS SOON
AS YOU OBSERVE THAT THE MOTOR DOES NOT STOP AT
THE PROPER LOCATION. If necessary, adjust the cradle open-
position limit switch as described in the topic entitled “Adjust the
Cradle Open-Position Limit Switch”, which follows.
ADJUST THE CRADLE OPEN-POSITION LIMIT
SWITCH
Jog the cradle open till it arrives at the set point.
Open the screen cradle jackscrew switch housing (I) and
remove the keeper (2).
Turn the OPEN-POSITION NUT (3) toward the switch until
the switch trips. Turn the nut an additional half turn toward the
switch.
Replace the keeper.
Run the jackscrew to check the up-position stop.
If the stop is okay, proceed with the steps that follow.
When you REVERSE the jackscrew operating direction, always ALLOW THE JACKSCREW MOTOR TO
COME TO A COMPLETE STOP. Release the control switch and allow a minimum of 5 seconds before
switching to the opposite operating position. If you don't allow this pause, the JACKSCREW AND OTHER
COMPONENTS MAY BE SEVERELY DAMAGED.