Philips CARDIOMD, Service Manual

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Gantry
3-10
„
CardioMD Service Manual
1MAN0158-H11 04-2005 CSIP Level 1
The function of the switches shown in Figure 3.8 is as follows:
Switch Designation Type Description
Collision
Override COLLISION
OVERRIDE Slide
switch This switch function is for manufacturing and service purposes.
When the switch is ON (position downwards), the collision
sensing on the collimators and detectors is disabled. At the same
time, the adjacent red LED is lit, indicating that a safety function
is disabled.
Caution . Make certain that the switch is OFF (position upwards)
when the system is in normal use
Ultimate
Stop
Override ULT_STOP
OVERRIDE Slide
switch This switch disables the bi-stable Ultimate Limit relay output. If
a motion has passed its ultimate end stop, the Limit relay
interrupts power to the system and the Ultimate Stop Override
has to be applied in order to re-enable motor power to be able to
back out. Use the Collision Override button and the appropriate
motion button on the hand controller.
An adjacent red LED is lit when the switch is ON.
Caution . Make certain that the switch is OFF (position upwards)
when the system is in normal use
Ultimate
Stop
reset ULT_STOP
RESET Push
button This button resets the bi-stable Ultimate Limit relay output. The
relay must be reset after clearance of the motion at the ultimate
stop limit
Zero
Enable ZERO_ENA Push
button
This button is used to set the calibration points for the absolute
encoders for the rotate, horizontal and vertical motion calibration
points.
The button must be pressed simultaneously with each of the
motion specific set buttons (Zero R, Zero H, Zero V)
Zero R ZERO_R Push
button This button sets the absolute encoder calibration point for the
rotate axis when pressed simultaneously with the Zero Enable
button
Zero H ZERO_H Push
button This button sets the absolute encoder calibration point for the
horizontal (X) axis when pressed simultaneously with the Zero
Enable button
Zero V ZERO_V Push
button This button sets the absolute encoder calibration point for the
vertical (Y) axis when pressed simultaneously with the Zero
Enable button
Table 3.3 The function of the safety board switches
3.2.3 Motion Controllers
3.2.3.1 Motions
The CardioMD system has four independent motions:
DETECTOR ROTATE The gear carrying the detectors can rotate over a range of 270°
DETECTOR Y The detectors can move vertically up and down over a range of
962 mm
DETECTOR X The detectors can move horizontally towards and away from the
patient table over a range of 495 mm
TABLE LONGITUDINAL The total travel range for the patient table is 100 mm.