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ILLUSTRATION 8-3
TELESCOPIC COLUMN AND CARRIAGE
TUBE SUPPORT
1-5Use of Longitudinal and Transverse
Detents
om 5184516-100 Rev. 5
The vertical load is balanced by a spring counterpoise system within the carriage.
The counterpoise system is equipped with a safety locking feature to prevent the
tube unit from falling in the event of spring or main cable failure. Adding an acces-
sory such as a collimator extension cylinder may cause the suspension to be
slightly out of balance.
Collimator accessory weight may not exceed 4.5 kg (10 pounds). Use
special care when using such an accessory since the tube unit will
tend to descend when the vertical lock is released.
The suspension is programmed with Longitudinal and Lateral detents to automati-
cally apply the locks and signal the collimator when the tube is positioned at spe-
cific SID's, for vertical table or wall stand procedures. For table, lateral detent is
set at the table lateral center line. For wall stand, lateral detent is set at the wall
stand panel lateral center line, and the longitudinal detent is set at SID 180cm(72
inches) and 100cm(40 inches). Selection is made at the time of installation and is
usually with the focal spot over the longitudinal table and wall stand center line.
The locks are actuated through electrical detents and the switch marked
DETENT. Depress the "DETENT" switch and the "LAT" switch to index the focal
spot over the longitudinal table center line. Depress and momentarily hold the
"LONG" switch (with the "DETENT" switch still depressed) to index the focal spot
at one of the pre–selected SID's. When reaching the approximate position, motion
should be slow to avoid passing over the detent bracket. To move out of the
indexed positions, depress the "DETENT" switch a second time.
CARRIAGE
TELESCOPING
COLUMN
USER
INTERFACE
8-4
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