Troubleshooting Basics
KVAL Operation/Service Manual
5-6
• Does the
Position Feed Back
agree with the
Load
position?
In other words are the correct photo eyes, limit switches or ferrous sensors acti-
vated?
Check the controller inputs to insure the proper sensors are activated. If the control-
ler is a PLC, an activated input is lit. Some touch screens have inputs status also.
3.
Common Position Feedback failures:
• Photo Eye:
a)
Bad element or bad cable
b) Eyes not set to correct height
c) Lighting from ceiling may be interfering with sensor
•
Limit Switch:
Stuck, or failure
•
Wiring:
Broken, worn insulation
•
PLC:
Bad input port
• Bad Output:
Relay may be stuck
• Air Solenoid Valve:
May be stuck or not working.
4.
Check the Positioning System
Follow the circuit from the
Controller
output to the
Load
and check for compo-
nent failures.
Summary of Contents for 990FX
Page 4: ...KVAL 990 FX Operation Service Manual ...
Page 30: ...Safety Sign Off Sheet KVAL 990 FX Operation Service Manual 1 20 ...
Page 85: ...Glossary of Common Terms 2 55 KVAL Operation Service Manual ...
Page 90: ...System IT Administration 3 5 KVAL Operation Service Manual ...
Page 129: ...Collet Torque Values 4 39 KVAL 990 FX Operation Service Manual ...
Page 130: ...Collet Torque Values KVAL 990 FX Operation Service Manual 4 40 ...
Page 164: ...Network System Overview KVAL Operation Service Manual 5 34 ...
Page 168: ...KVAL 990 FX Operation Service Manual ...
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