Triggering Method Affects Operation Which safety and control methods are used depends upon how the conveyor push was triggered. Trigger Push Mode Notes Applies:
In-shield Locking Push key Adjacent Locking Push key
Manual
Conveyor Push Timeout Target Stroke Timeout Target stk (optional) Does not apply: Shield back protection Delta protection Applies:
SRB BankPush
Automatic
Endgate Push
Shield back protection Delta protection Endgate even-push Timeout Target Stroke
AutoDrag AutoDrag is a conveyor push feature designed to allow the conveyor to push, instead of aborting, when a shield has not advanced or when the system can not determine that a shield has advanced (i.e., the ram sensor is invalid and is not turned off in the Sensor Status menu). If a shield has an invalid ram sensor that is not turned off in the Sensor Status menu or if a shield has failed to advance, then it will be lowered off of the roof and dragged forward by the neighbor shields when they push. It will be set back to the roof when all pushing has completed in the area. This process begins when conveyor push becomes active on any nearby shield. The shield that needs to AutoDrag will display “Auto Drag” and lower from the roof for the time of the “AutoDrag Lowering Time” parameter.
Parameter "AutoDrag Lowering Time"
After it has lowered, all of the nearby shields are allowed to push. They will display “Push-Drag #xx”, indicating the shield that is being dragged. For AutoDrag purposes, “nearby” is defined as any shield within the “Abort Distance” parameter from the shield that is back and/or has an invalid ram. This feature will only work when SRB is active and running with Serial or Infrared shearer tracking mode. © Caterpillar
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