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Compulink StageLok: The StageLok System is run in every class during every event. The long-standing “shallow-staged” red light problem is a thing of the past with this system. Before this system was designed, cars or bikes that were very lightly staged could easily vibrate or rock out of the staging beam. When that happened, the infrared beam reconnects causing what may “appear” as a false red light foul. In many cases, the simple vibration would cause the foul for those who shallow staged, even without the rocking of the car or bike when the rpm’s were raised. In all cases of shallow-staged red light fouls, it appeared that the car never moved. This is because the infrared staging beam measures 1/100 of an inch. So for those who shallow-staged, it didn’t take much for that beam to reconnect for a vehicle that isn’t line-locked which rolls backwards, trans-brake slippage or simple unloading of the front tires caused by torque when the motor is “matted” against a trans-brake (generally the #1 cause of shallow-staged red lights).

The StageLok system was designed to prevent these “false” (yet legally binding) red lights fouls. Here’s an inside look at how the system actually works. Prior to either car entering the Pre-Stage beam, the starter manually triggers a switch that tells the computer to arm the AutoStart system. The Timing System takes control of the run from that point on, eliminating the possibility of human error. Once both cars have satisfied the “Staged Minimum” time preset (usually .5 seconds, but varies from class to class), the StageLok sequence initiates before the tree is fired allowing the racer 1” of rearward travel before the stage beam will go out. This 1” allowance is active through the entire AutoStart System, until the algorithm has reached the green light - at which point a rearward movement will not result in a red light foul.

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Originally posted by Tom Reyer:

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Compulink StageLok: The StageLok System is run in every class during every event. The long-standing “shallow-staged” red light problem is a thing of the past with this system. Before this system was designed, cars or bikes that were very lightly staged could easily vibrate or rock out of the staging beam. When that happened, the infrared beam reconnects causing what may “appear” as a false red light foul. In many cases, the simple vibration would cause the foul for those who shallow staged, even without the rocking of the car or bike when the rpm’s were raised. In all cases of shallow-staged red light fouls, it appeared that the car never moved. This is because the infrared staging beam measures 1/100 of an inch. So for those who shallow-staged, it didn’t take much for that beam to reconnect for a vehicle that isn’t line-locked which rolls backwards, trans-brake slippage or simple unloading of the front tires caused by torque when the motor is “matted” against a trans-brake (generally the #1 cause of shallow-staged red lights).

The StageLok system was designed to prevent these “false” (yet legally binding) red lights fouls. Here’s an inside look at how the system actually works. Prior to either car entering the Pre-Stage beam, the starter manually triggers a switch that tells the computer to arm the AutoStart system. The Timing System takes control of the run from that point on, eliminating the possibility of human error. Once both cars have satisfied the “Staged Minimum” time preset (usually .5 seconds, but varies from class to class), the StageLok sequence initiates before the tree is fired allowing the racer 1” of rearward travel before the stage beam will go out. This 1” allowance is active through the entire AutoStart System, until the algorithm has reached the green light - at which point a rearward movement will not result in a red light foul.

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Originally posted by DragRaceResults:
"Stage Lock" = problems. This feature is so flawed it's unbelievable.

Don't get me started

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Compulink StageLok: The StageLok System is run in every class during every event.