# SSD - Stick Slip Detection

Tools
ES STR SL ST SR QST IXB

This step monitor detects and reports stick slip effects during a step. The detection is done by counting the number of times the torque falls below the Trigger Level. If the number of times is larger than Maximum Number of Oscillations then the stick slip error is reported. The monitor operates in two different modes, Dynamic or Fixed. The difference between the modes is the way that the Trigger level is calculated.

Dynamic Torque: Trigger Level is dynamically calculated as Peak Torque Percentage of the current max torque, which has been achieved so far during the monitoring. The monitoring is started as soon as the torque passes the Trigger Torque.

Fixed Torque: Trigger Level is the fixed Trigger Torque specified by the user. In this mode the percentage is not needed.

If the torque never reaches the Trigger Torque then the monitoring is not started, this will result in status NOK.

Parameter | Description
--- | ---
Type | Specifies what type of Stick slip detection that will be done in the monitor Stick Slip detection. Default: Dynamic torque.
Peak Torque Percentage | Default: 80%, Must be >=10 and < 100.
Trigger Torque | Default: 5, Must be >= 0 and < Tool max torque.
Maximum Number of Oscillations | Default: 5, Must be >= 3 and <20.