Philips CARDIOMD, Service Manual

Page: 96 / 466

Motion Limit Checks
4-40
„
CardioMD Service Manual
1MAN0158-H11 04-2005 CSIP Level 1
Procedure Details
5. Use the hand controller to position the
detectors horizontally with detector 1
im-
mediately adjacent to and touching the ta-
ble. Use the hand controller Collision
Override button for the last approx.
5 – 8 mm.
The reading for the horizontal position on the
acquisition PC must now be 221 +/– 1 mm.
6. Use the Collision Override button to move
the detectors slightly away from the table
(until the hand controller LED is not lit
any more).
Note . The horizontal position described above is the same position where the horizontal absolute
position encoder is zeroed whereas the vertical position differs. The vertical position encoder is
zeroed 790 mm from the top instead of 832 mm.
4.5.3 Verifying Operation within Software Limits
CardioMD system motions operate within two sets of limits. In principle, these function as illus-
trated in the diagram Figure 4.1.
Figure 4.1 CardioMD motion limits
This section tells you how to verify operation within software limits. Section 4.5.4 on page 4-41
gives instructions for verifying ultimate limits.
The gantry must be able to operate within the software limits:
•
Horizontal: 0 mm to 495 mm
•
Vertical: 231 mm to 1193 mm
•
Rotational: –90º to +180º.
The easiest way to verify this is the following sequence.
Procedure Details
1. Place the system in the patient load posi-
tion.
2. Move the detector all the way backwards
(away from the patient table).
3. Check max. horizontal reading.
4. Move the detector all the way downwards
as follows:
Motion axis
Software limits
Ultimate limits