FEC AFC1500 User Manual
Page 148
Chapter 8: System Operations
Page 8-4
8.2
Basic Operational Tests
WARNING:
Follow Lockout/Tagout and other safety precautions when connecting or
disconnecting cabling, wiring, and equipment. When performing the
following inspections, verify that the System is disabled prior to touching any
moveable components.
8.2.1 Torque transducer.
The system can perform a transducer check before each fastening cycle, comparing the val-
ues from the torque transducer (zero and calibration) to the data stored in the system memo-
ry. The system is maintenance free, however it can be manually checked as follows:
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1. Be sure that the nutrunner is in the READY mode.(powered up and not running with a STOP sig-
nal applied)
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2. Check that the torque display shows 0 when the keyboard-display unit RESET key is being
pressed. (If part of a Multi Unit configuration, the Multi Unit buttons may be used to check all con-
nected spindles)
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3. At the same time as 2 (above), check that the ACCEPT LED is lit.
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4. Check that the display is showing the full scale torque value when the SAN unit CAL key is being
pressed. (If part of a Multi Unit configuration, the Multi Unit buttons may be used to check all con-
nected spindles)
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5. At the same time as 4 (above), check that the ACCEPT LED is lit.
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If any of these checks fail internal limits, an ABNORMAL will be generated and the ABN LED will
light. See Chapter 9 for troubleshooting.
8.2.2 Resolver.
Take the following steps to manually inspect the resolver:
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1. Make sure that the system will not be started up by the PLC (use the manual mode).
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2. Place the SAN keyboard-display unit into the real-time display mode (Chapter 7 - Display has on-
ly one digit active in the D-NO display. This is the default mode when power is applied). The [D-NO]
display must be set to [3] using the arrow keys in order to see the angle of rotation on the DATA dis-
play.
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3. If the socket of the tool is turned in the clockwise direction, the angle indication should increase.
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4. Verify that the angle rotated matches the indicated angle in the data display.
8.2.3 Motor.
If doubts about the condition of the motor exist, the winds can be manually checked with a
Ohm meter. To check the motor, measure the winding's resistance and the isolation resis-
tance.
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1. Power down the system.
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2. Disconnect the motor connector from the tool assembly.
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3. Measure the resistance between windings. (Refer to Fig 8-2-3)
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4. Measure the isolation resistance between each pair and the frame.
Insulation resistance: Using a megohmmeter, 500 VDC, 50 Mohms or more, test the insula-
tion resistance between the motor windings and the motor case. The values should register in
excess of 50 Mohms for each winding.