FEC AFC1200 - Manual (Page 76)

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7.12.3 SCREEN OPERATION
3-1. TO adjust the calibration, a simple calculation must be performed. With the master
torque transducer in-line with the FEC torque transducer, perform 10 fastenings and
collect the fastening torque data from the FEC and the master transducer.
3-2. DETErmine the average reading from both transducers and insert them into the
following formula:
(AVG. OF MASTER) - (AVG. OF FEC)
---------------------------------------------------- X 100 = RATIO [%] preset
AVERAGE OF MASTER
EXAMPLE:
FEC AVERAGE = 10.0 KGM MASTER AVERAGE = 9.8 KGM
9.8 KGM - 10.0 KGM
------------------------------ X 100 = -2.0408 (RATIO [%])
9.8 KGM
3-3. The calibration adjustment range is +/- 9.9%. The normal value to set the calibration
percentage is 0%. THIS value should change only if transducer matching is not
possible. The calibration percentage should be as close as possible to 0%.
3-4. TO change the calibration ratio %, set the RUN/PROGRAM key switch to PROGRAM
and depress the [SEL] key. THE screen will highlight the first spindle RATIO [%]
3-5. USINg the
[↑] [↓]
keys, move the highlighted cursor to the desired spindle.
3-6. USING the numerical,
[±]
and [.] keys, enter the RATIO [%] value and depress the
[↵]
key. THe screen will change to display the new data.
3-7. AFTer all data has been entered, depress the [SEL] key and the question "DATA
CHANGE OK?" will appear. SELect YES if the data is to change or NO if the old
data should remain.
3-8. TO print out the torque calibration data, use the
[←] [→]
keys to move the cursor on
the menu bar to [PRINT] and depress the
[↵]
key.
NOTE: After adjusting the Calibration Value, the machine configuration should be saved to disk.
Chapter 7: System Operation
Page 7-76