Agilent Technologies U1840A Medalist sj5000, Hardware Manual

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Troubleshooting
11
Agilent U1840A Medalist sj5000 Hardware Manual 11-9
Board is not clamped
• Check whether the clamping mechanisms are blocked. If they
are, lubricate them.
• Ensure the
RAIL
switch(es) on the switch plate is set to the
INSP
(inspect) position.
• Turn the
MAINT. SWITCH
to the ON position. From the
Maintenance window, force the clamps up and down.
Visually check if the motor is working.
• Ensure the Disable Clamping output has not been set. (Refer
to the
Engineering Manual , Tools Menu: Machine IO.)
• Check if the clamp drive motor is operating and verify 24 V
DC power to the drive.
Inspection yields fiducial mis-reads
Typically this is a software problem that occurs when the
fiducial appearance has changed. See “Fiducial Setup” in the
Engineering Manual .
In some instances this could be a hardware setup issue where
the board is not reaching the stops or is overshooting.
• Check if the board is tight in the conveyor.
• Check the belt condition.
• Check the conveyor speed.
• Check that both belts are working.
• Check the position sensor sensitivity.
Conveyor will not run
• Refer to the Electrical Drawing document.
• Check that the conveyor is not obstructed.
• Check that MCB Q4 is on.
• Check that all E-Stop buttons are pulled out. Examine the
three indicator lights on the relay and verify that KA4 is
activated.
• Check that the Entry sensor is functioning and that this
signal is read by the PLC.
• If SMEMA is used, ensure that a Not Busy (PLC input 0.01)
signal is sent from the downstream machine.
• Check that P404 (stepper driver) is working.