Residual Torque / Peak
This strategy evaluates the residual torque on a joint as the peak torque necessary to rotate the screw further.
Parameter | Description |
|---|---|
Required tag number | A specific number must be written in the TAG of the end fitting tool. |
Name | Name of the tightening program. |
Program start | Torque value from which the tightening operation starts. |
Torque min | Lower torque limit. |
Torque max | Higher torque limit. |
Maximum torque limit | If the torque applied reaches this limit, the message Change screw is shown on the wrench display. |
Target torque | The torque target. |
Trigger torque | Torque value from which the angle measurement starts (usually set to 50% of the Target torque). |
Angle min | Lower angle limit. |
Angle max | Higher angle limit. |
Target angle | The angle target. |
Torque units | This parameter is not editable. |
Angle limit for rehit | If the Torque min value is reached within the specified angle, the message Joint already tightened is shown on the wrench display. |
Stop condition | Select between Torque peak and Angle peak. |
Torque correction coefficient | When extensions are used, the wrench measurement might 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 | When extensions cause additional wrench bending, the wrench angle measurement can be compensated to show a more accurate angle value. When extensions are not used, Angle correction = 0. |
Batch size | Number of tightenings the batch will perform. |
Max consecutive NOK | Number of accepted consecutive NOK to have an OK result. |
End cycle time | Starts when the torque goes below the Program start after reaching the 3rd percentage. |
Ratchet time | Starts when the torque goes below the Program 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 | Torque min | B | Torque max |
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 Trigger torque) instead of the peak torque:
A | Torque min | B | Torque max |
C | Target angle |
During the test operation, LEDs, buzzer and vibration are activated as follows:
LED:
White LED: activated when the torque value goes over the smartHEAD's Min load value.
First, second and third radial gradient LEDs turn green in sequence when the three thresholds defined for the tool in use are reached.
For further information, refer to Tool LEDs.All three radial gradient LEDs green: torque between Torque min and Torque max.
All three radial gradient LEDs red: torque over Torque max.
Buzzer:
The beep starts when the torque goes over the Program 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 behave according to the configuration of Result Indicator and Duration defined for the tool in use.
For further information, refer to Tool LEDs.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.
