User guide

Troubleshooting 49
5.4.3 Dispensing Head
Table 5-3 Dispensing Head Troubleshooting
Symptom Possible Cause Recovery
No X-, Y-, or Z-Axis
dispensing head motion
No system power
Refer to Table 5-1 - System Power
Troubleshooting.
Servo amps failed
Contact a service technician.
+48V power supply down
Limits not cleared
Home/Limit cable disconnected Connect cable.
Dispense Head fails to
find Home
Home PCA damaged Replace PCA.
Home flag not positioned properly Contact a service technician.
Obstruction preventing machine
motion
Remove obstruction.
Dispense Head starts to
move, stops, and goes
open loop
Fatal following error
Contact a service technician.
Cable pulley loose
Amp inhibit (voltage, current, hall,
temp)
Jerky movement
Mechanical interference along X-,
Y-, or Z-axis
Visually inspect the axis for anything
that may be restricting movement.
Dispenses at wrong
Z-axis position
Height Sensor has been adjusted
or is loose
Perform a Valve Offsets or Calculate
Master Offsets routine in FmXP. For
assistance, refer to the Fluidmove User
Guide or Online Help.
Nozzle/needle has been changed
5.4.4 Height Sensor
Table 5-4 Height Sensor Troubleshooting
Symptom Possible Cause Recovery
Probe does not drop or
retract
Probe damaged Check for bent probe.
No air pressure Verify main air pressure is ON.
Needle hits substrate
Probe tip is lower than the needle tip
when valve is in dispensing position
Perform Valve Offsets or Calculate
Master Offsets in FmXP.