Philips CARDIOMD, Service Manual

Page: 98 / 466

Motion Limit Checks
4-42
„
CardioMD Service Manual
1MAN0158-H11 04-2005 CSIP Level 1
4.5.4.1 Motion Controller Software 7MOT0096-N14 and Later
Caution . With motion controller software release 7MOT0096-N14 and later,
SW8 on the motion controllers can no longer be used.
The ranges within which the ultimate switches must go active are:
•
Horizontal: – 7 mm < X
min
< – 2 mm, 497 mm < X
max
< 505 mm
•
Vertical: 218 mm < Y
min
< 228 mm, 1195 mm < Y
max
< 1199 mm
•
Rotational: Z
max
> 182°.
Note . It is not possible to approach the rotational ultimate limit by rotating the detector to the Z
min
< – 90° limit. However, testing the ultimate limit at Z
max
> 182° alone is sufficient for verification
of the functionality, since the same limit switch serves both rotational limits.
Preparing for Testing Ultimate Limit Switches
Testing ultimate limit switches requires the following preparations:
•
Removing both table console covers (front and rear – if these have not already been removed)
•
Disabling software limits. This is done by sending commands to the master (rotate) motion
controller via a HyperTerminal connection
•
Starting the CardioMD acquisition software.
Before testing X axis limits, furthermore:
•
Removing the patient table pallet.
Before testing Y axis limits, furthermore:
•
Removing the patient table pallet
•
Rotating the detector assembly to approximately 110°.
Disabling Software Limits
In order to verify ultimate switches, software limits must first be disabled (the diagram in Figure
4.1 on page 4-40 may give you an idea, why). In order to accomplish this, software limits are tem-
porarily set to values well beyond the ultimate limits. For this, you need to establish a Hyper-
Terminal connection to the rotation motion controller (the motion controller to the right).
For instructions on using HyperTerminal for communicating with motion controllers, see Chap-
ter 5
Diagnostics , the section Motion Controller Diagnostics . Once the HyperTerminal connection
is established:
Procedure Details
1. When you see the prompt
->
in the
HyperTerminal window indicating that
you are communicating with the motion
controller, enter the following string of
commands:
wrsdo 0x607D 1 -752400 [Enter]
wrsdo 0x607D 2 3762000 [Enter]
wrsdo 0x687D 1 -59904 [Enter]
wrsdo 0x687D 2 8815104 [Enter]
wrsdo 0x707D 1 -5184000 [Enter]
wrsdo 0x707D 2 5184000 [Enter]
CAUTION