User Manual

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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 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 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 Main Unit BUSY LED are unlit).
3. Press the RESET button on front of the Main Unit. The Axis Unit will output a number to
[DSP1], and the CHECK and ACCEPT LEDs will light. The 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 Main Unit. The Axis Unit will output a number to
[DSP1], and the CHECK and ACCEPT LEDs will light. The 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 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 Main Unit RUN/PROGRAM switch MUST be set to the 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 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 Main Unit. Then, set the
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 angle measurement.
5. Verify that the angle measurement displayed in [DSP2] equals the actual angle of rotation.
Chapter 8: Maintenance and Inspection User Console Version A3.53
Page 8-4