Quantum QT-740, Service Manual

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Chapter 2 Assembly & Installation
Models QT-740 & QT-750 - Service Manual
17
OPERATIONAL CHECKS AND ADJUSTMENTS
When the table is completely assembled and all required electrical connections have
been made, perform the following tests to verify proper system operation. Tests for
the table’s elevating (up/down) functions and positive beam limitation (PBL) are
required only on Model QT-750 Odyssey HF Series X-ray Generators.
CHECKING TABLE FLOAT-TOP OPERATION
1. Depress the FLOAT foot pedal. The tabletop should move freely in either
direction. Release the FLOAT foot pedal. The tabletop should be locked
securely in its present position.
2. Depress the FLOAT push button. The tabletop should move freely in either
direction. Release the FLOAT push button. The tabletop should be locked
securely in its present position.
CHECKING UP/DOWN OPERATION (MODEL QT-750 ONLY)
Depress the UP and then the DOWN foot pedal. The following should occur while
each foot pedal is depressed:
1. The tabletop should start to move up (while the UP foot pedal is pressed) and
down (while the DOWN foot pedal is pressed).
2. The FLOAT foot pedal (the outside pedals) should be disabled (i.e., the table-
top should remain locked) while the tabletop is moving up or down.
3. With the table running either up or down, press the red Emergency Stop
Switch. Table up or down motion should stop. Turn the Emergency Stop
Switch counterclockwise until it is released. Tabletop up/down motion is now
enabled when foot pedals are pressed.
4. While running the table down, manually activate each Down Limit Safety
Switch (S7 and S10, see Figure 9). The table should stop driving down.
5. While running the table up, manually activate each Up Limit Safety Switch (S8
and S9, see Figure 9). The table should stop driving up.
CAUTION! Table up/down height must be set to
the heights specified in the following steps. Failure
to do so can cause damage to table components.
6. With table top in fully up position, measure table top height (i.e., distance
from floor to top of table). Table up height should be 32" (812.8 mm). If
not, loosen two (2) screws on Up Limit Safety Switch Mounting Bracket and
adjust position of the Up Limit Safety Switches. Verify correct table top
height after adjustment.
7. With table top in fully down position, measure table top height (i.e., distance
from floor to top of table). Table down height should be 21.5" (546.1 mm).
If not, loosen two (2) screws on Down Limit Safety Switch Mounting Bracket
and adjust position of the Down Limit Safety Switches. Verify correct table
top height after adjustment.