Agilent Technologies U1840A Medalist sj5000 Hardware Manual page 172

11
Troubleshooting
Troubleshooting
11-38
Troubleshooting the XY table motor controller
• Home the X and Y axes individually, to identify and rule out
any electrical cable communication issues.
• Jog the X and Y axes individually, to identify and rule out
motor and encoder communication issues.
• Manually move the gantry to activate the Home and Limit
markers, to identify and rule out read head cable
communication issues.
XY table motor controller is not operating
• Are MCB Q7 and Q8 on?
• Is there an emergency stop condition?
Examine the three indicator lights on the safety relay.
• Check that all cables are in position and securely connected.
• Check that safety relays KS4 and KS5 are activated.
• Check that 24 V supply to the amplifiers is present.
• Check that the contactors KS2 and KS3 are at the ON
position.
Gantry will not home during software startup
• The Anorad gantry has protective metal casings that cover
the magnets. If the metal plate is damaged, there is a
possibility that a magnet could be cracked or damaged,
which would prevent gantry movement across that position.
The machine seems to vibrate. How do I know if it is level?
• Loosen the feet locking nuts and turn each of the adjustable
feet slightly to verify that each is carrying some weight. If
they are properly adjusted, all four feet should have similar
resistance to turning.
• The leveling of the machine should be verified by placing a
level gauge on the metal railing of both axes of the gantry.
You can also check the level on the base of the machine.
• To verify the machine level, run a Multi GR&R using the
fiducial plate from the Tools menu. Review the x/y scatter
plot displayed in the results screen. All of the green
inspection points should be very close to the center of the
target. If there is a trend toward one side, or the points are
arranged in some symmetrical pattern, it is probably because
the machine was not leveled correctly.
Agilent U1840A Medalist sj5000 Hardware Manual