Residual Torque / Peak
This strategy evaluates the residual torque on a joint as the peak torque necessary to rotate the screw further.
Parameter | Description |
|---|---|
Inspection Name | Name of the inspection. |
Cycle start | Torque value from which the test operation starts. |
Minimum torque | Lower torque limit value. |
Maximum torque | Upper torque limit value. |
Change screw | If the torque applied reaches this limit, the message Change screw is shown on the wrench display. The Change screw must be ≥ Maximum torque. |
Target torque | Torque target value. |
Torque tolerance | Torque tolerance that defines the maximum torque and the minimum torque according to the Target torque previously specified. Value is expressed in percentage (%). |
Final angle monitoring torque | Torque value from which the angle measurement starts (usually set to 50% of the Target torque). |
Target angle | Angle target value. |
Torque units | Measurement unit set for the joint linked to the inspection. |
Control mode | Method to define the torque limits from the following options:
|
Torque correction coefficient | When extensions are used, the wrench measurement must be compensated to show a more accurate torque value. To calculate the correction coefficient, please refer to How to calculate the Torque Correction Coefficient. When extensions are not used, Torque correction coefficient = 1. |
Angle correction coefficient | When extensions cause additional wrench bending, the wrench angle measurement must be compensated to show a more accurate angle value. When extensions are not used, Angle correction coefficient = 0. |
Number of sample | Number of tests to run inside the inspection. |
Ratchet time | Starts when the torque goes below the Cycle start without reaching the 3rd percentage value. This allows the operator to release the torque for a while and recharge during the tightening operation. |
With this strategy, the breakaway point is not detected automatically. Therefore, this is a less objective method of evaluating residual torque. It may be used when the residual torque/time or torque/angle methods cannot be performed.
A | Minimum torque | B | Maximum torque |
C | Torque peak |
Define the torque limits to get an OK result.
If the Target angle value is not specified, the angle result is marked as Not Applicable.
If a Target angle value is specified, the residual torque result is measured at the specified angle (starting from the Final angle monitoring torque) instead of the peak torque:
A | Minimum torque | B | Maximum torque |
C | Target angle |
During the test operation, LEDs, buzzer and vibration are activated as follows:
LED:
White LED: activated when the Cycle start is reached.
Buzzer:
The beep starts when the torque goes over the Cycle start value; the signal increases when the residual torque is detected / the tightening process has been completed.
Vibration:
Starts when the residual torque is detected if a Target angle is specified.
At the end of the test operation, LEDs, buzzer and vibration are activated as follows:
LEDs:
Green LEDs: torque result within the minimum and maximum limits.
Red LEDs: torque is outside the minimum and maximum limits range.
Buzzer
Two beeps indicate the end of the operation; if the final result is in the red area, the signal in continuous.
To stop the buzzer, start a new tightening operation or press a button on the tool controller.
Vibration:
Stays active until the torque applied is released.
