FEC AFC1200 - Manual (Page 4)

)(& ,QF
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 performs a transducer check before each fastening cycle (when selected by the
PLC or Sequence Setup). During the check, the System reads the values (Zero and Cal)
output from the torque transducer, and compares them to the data stored in the System
memory. The torque transducer requires no maintenance, but it is important to test it
occasionally as follows :
1. Set the Axis Unit NORMAL/IN BYPASS switch to the NORMAL position. If multiple Axis
Units are connected to the ISA Main Unit, verify that only the Axis Unit being tested is set
to NORMAL, and the others are set to IN BYPASS.
2. Set the ISA Main Unit RUN/PROGRAM switch to the RUN position, and the AXIS-DSP
switch to position one (1). Verify that the nutrunner under test is in the READY mode (the
Axis Unit REJECT LEDs and the ISA Main Unit BUSY LED are unlit).
3. Press the RESET button on front of the ISA Main Unit. The Axis Unit will output a number
to [DSP1], and the CHECK and ACCEPT LEDs will light. The ISA Main Unit CHECK LED
and ACCEPT light will illuminate to verify the Axis Unit is sufficiently within range of zero
(0). (See NOTE1 and Step #5, below.)
4. Press the CAL button on front of the ISA Main Unit. The Axis Unit will output a number to
[DSP1], and the CHECK and ACCEPT LEDs will light. The ISA Main Unit CHECK LED
and ACCEPT light will illuminate to verify the Axis Unit is sufficiently calibrated. (See
NOTE1 and Step #5, below).
5. If for any reason the accuracy of the tool transducer is in question, the transducer should
be calibrated in accordance with Section 7.12.3.
NOTE1: If the Zero and/or Cal check results in an "ABNORMAL" LED output to the Axis Unit
(and/or an illuminated "REJECT" light on the ISA Main Unit), then follow the instructions
shown on the System monitor. Section 9.4.1 Axis Unit Abnormal also offers guidance.
8.2.2 Encoder
WARNING: The ISA Main Unit RUN/PROGRAM switch MUST be set to PROGRAM mode to
prevent the servo from starting while the spindle is being turned manually.
Inspect the encoder as follows:
1. Verify that the System will not be activated by the PLC.
2. Set the Axis Unit NORMAL/IN BYPASS switch to the NORMAL position. If multiple Axis
Units are connected to the ISA Main Unit, verify that only the Axis Unit being tested is set
to NORMAL, and the others are set to IN BYPASS.
3. Clear the Axis Unit outputs by pressing the RESET button on the ISA Main Unit. Then, set
the ISA Main Unit RUN/PROGRAM switch to the PROGRAM mode, and the AXIS-DSP
switch to position one (1).
4. Rotate the tool square drive (with attached socket, if applicable) in a clockwise direction.
The [DSP2] display will output a number (a negative number if set for counterclockwise
rotation) to indicate the rotational angle measurement.
5. Verify that the angle measurement displayed in [DSP2] equals the actual angle of rotation.
If not, refer to Sections 8.2.3 (Motor Inspection) and 9.4.5 (Encoder Abnormal).
Chapter 8: Maintenance and Inspection
Page 8-4