When running at high speed, products come off the end of the conveyor at a high rate. There is the facility to pause feeding when the catcher is full, which gives the operator time to empty it.
We call this the stack counter, and it can be set to the number of products that fit comfortably into the catcher. When this number is reached the feed is interrupted and the run button flashes. To resume feeding all you must do is press this same button.