A certain machine builder mounts their Hole Detect sensors to the Die on their Die Accelerator systems. Our Hole Detect and Hole Correct features have always required sensors be mounted in a stationary(Fixed) location.

To use a sensor mounted on a Die Accelerator, the position of the Die must be captured and used to adjust the location of the sensed hole.

On a closed loop system, when the sensor detects a hole, a high-speed interrupt is triggered and the line encoder count is captured to account for any encoder counts that have occurred since the last Loop Iteration. For the best accuracy, the same must happen for the Die Accelerator encoder. This is not possible on a SERCOS controlled Die. SERCOS controlled Dies will possibly have an accuracy limitation. However, it is assumed that in most cases, the hole that the system needs to act on will be sensed when the Die is sitting stationary waiting. The small inaccuracy in the sensed holes that occur while the die is moving are not expected to be a factor unless the prior assumption is false.

To configure the system to adjust the sensed holes by the position of the die, a new setup parameter called Hole Detector Mount has been created. It has two options, Fixed and Die Mounted. It defaults to Fixed to avoid impacting legacy installations that receive a software update. Obviously if the sensor is mounted to the Die, the Die Mounted selection should be made.