When doing hole correction on a machine where the holes are being added Asynchronously by an upstream process, the controller must have a detected hole to initialize the part queue with. The controller doesn't know anything about the holes. They may not all be the same size or shape. They may not be evenly spaced. The controller must rely on the operator to jog a hole through the detector for the leading edge of the first good part. The controller will add a shear here to create the leading edge of the first part. This can be inconvenient if not necessary, for example, on a machine where all the holes are the same size and are all evenly spaced.

An additional problem is that doing a leading-edge scrap cut while in run, may not be easily handled by the machine.

It may be desirable and accurate enough to lineup the material such that a manual shear will cut in the correct place, with respect to the first hole. This will align the leading edge of the material such that the holes are synchronized correctly with the detector so that the remaining cuts can be properly adjusted as the holes are detected within the Hole Tolerance. The scrap that is created by the manual shear can be easily dealt with prior to entering the run mode.

A new selection in the Hole Correct Mode setting has been created to allow users to inform the controller that all the holes are evenly spaced, equivalent, and it is OK to initialize the queue with respect to a manually cut leading part edge. The new option is named Evenly Spaced Async.

A modification to the Hole Generation simulation on the PC simulator was made to allow this new option to be more easily tested.