Nordson Spectrum II Series User Manual

7-6 Troubleshooting
7.4.6 Mechanical/Tactile Height Sensor
Table 7-6 Height Sensor Troubleshooting
Symptom Possible Cause Recovery
Probe does not drop or
retract
Probe is damaged.
Check for bent probe. Replace if necessary. See 8.12
Replacing the Mechanical/Tactile Height Sensor Probe.
No air pressure. Verify main air pressure is ON (I).
Pneumatic hose is kinked or
pinched.
Check pneumatic lines.
Probe either drops too
slowly or slams down with
too much force
Main air pressure not set
properly.
Readjust main air pressure regulator to system’s
nominal pressure.
Pneumatic hose is kinked or
pinched.
Check pneumatic lines.
Needle hits substrate
Probe tip is lower than the
needle tip when valve is in
dispensing position.
Adjust probe and perform “Valve Offsets” in Fluidmove.
See 5.10 Adjusting the Height Sensor Probe (Option).
The Height Sensor is not set up
properly.
Test the height sensor. Fluidmove provides a height
sensor test utility from the
Tools > Diagnostics
menu. The probe can be toggled up and down to verify
probe functionality. There is also a test procedure that
captures HS trigger values. Fluidmove can display a
statistical analysis of the captured values.
HS velocity is set too high.
Reduce the HS velocity to 2 inches per second and re-
run the valve offsets. Test the Height Sensor from the
diagnostics menu if necessary.
Probe hits substrate
before it is fully extended
Safe Z Height too low. Reteach Safe Z Height. See 4.9.1 Safe Z Height.
Retract distance too low.
Reteach the retract distance in the height sensor setup.
Refer to the Fluidmove User Guide or Online Help.
7.4.7 Laser Height Sensor
Table 7-7 Laser Height Sensor Troubleshooting
Symptom Possible Cause Recovery
Height Sensor does not
power up
Height sensor is not plugged in.
Check power connection and verify that Height Sensor
plugged in.
Bad resistor on the main board
d-sub connection.
Use a multimeter to verify that the main board d-sub
resistor is good.
Height Sensor does not
trigger
Dip switches not set properly.
Verify that dip switch number 6 on SW1 on the Main
Board is set to on.
Height sensor lens is dirty. Check and clean the Height Sensor lens.
No communication with PC. Verify I/O tools can toggle height sensor bits.
Intermittent function Loose or frayed cables. Check cables for tight connection and wear.

Nordson Spectrum II Series Specifications

General

Brand	Nordson
Model	Spectrum II Series
Category	Dispenser
Language	English