# Wrench Production Tightening Stage Parameters

The parameters shown in the tables are available if one of the STwrench strategies are used. There are several combinations of strategies. Some of the parameters are only available for certain strategies and may not be visible in other strategies.

Parameter rules are automatically checked. If a violation occurs, the error indicator is displayed beside the incorrect parameters. Select the error indicator to display more information about the error.

Switching between strategies can result in the error indicator being shown. This indicates that the chosen combination is invalid, and needs to be corrected.

For more information about the STwrench, see the STwrench User Guide (printed matter number 9836 4134 01).

Parameters in the STwrench tightening step
Parameter name | Condition | Description | Default value
--- | --- | --- | ---
Control strategy |  | The parameter options are: Torque/Angle, Yield point, Loose and PVT compensate with snug. |
Premature torque loss detection time |  | From rundown complete, the program may start the tightening with an increase in torque. If the tool detects a decrease in torque within this time frame, a slip-off is reported If the socket slips of the screw head and the measured torque decreases below Rundown complete within the specified time, the tightening is aborted and premature torque loss is reported. | 200 ms
Target |  | Select the target from the drop-down menu. The parameter options are: Torque, Angle, Torque or Angle. | Torque
Target Torque |  | Defines the target torque for tightening step. | 0 Nm
Torque limits | Target = Torque | Selection made by a switch. Auto or Manually position. |
Torque min | Torque limits = Manual | Torque value for the lower limit | 0 Nm
Torque max | Torque limits = Manual | Torque value for the upper limit | 0 Nm
Target Angle | Target = Angle or Target=Torque or Angle | Defines the target angle for tightening step. | 0°
Angle limits | Target = Angle | Selected from a drop-down menu. The parameter options are: Auto or Manually. Angle values for max and min can be or selected |
Angle limits | Target = Torque | Selected from a drop-down menu. The parameter options are: Off: No angle limit monitoring. From rundown complete: The monitoring window is set from when the Rundown complete torque is reached. From torque: The monitoring window is set from when the specific torque value is reached. |
Final angle monitoring torque |  | Torque value from when the angle limits are monitored | 20 Nm
Angle min | Angle limits = on or manually | Angle value lower limit | 324°
Angle max | Angle limits = on or manually | Angle value upper limit | 396°
Angle search limit | Angle limits = manually |  | 0
Measure torque at |  | Selected from a drop-down menu. The parameter options are: Max torque value Value at peak angle |
NOK on final less than target |  | Selection made by a switch. On or Off position. | Off
Change bolt limit |  |  | 50 Nm

Additional parameters in the STwrench tightening step if the strategy is Wrench - Production, and PVT compensate with snug is the control strategy
Parameter name | Condition | Description | Default value
--- | --- | --- | ---
Torque compensation point | Torque compensation = On |  | 0°
PCT distance | Torque compensation = On |  | 360°
PVT interval | Torque compensation = On |  | 180°
Delay monitoring | Torque compensation = On |  | 0°
Prevailing torque min | Torque compensation = On | Torque value for the lower limit | 1 Nm
Prevailing torque max | Torque compensation = On | Torque value for the upper limit | 20 Nm
Compensation value | Torque compensation = On | Selected from a drop-down menu. The parameter options are: Average torque Peak torque |