What moves 100,000 times per day and goes nowhere?

One of our 4 high speed, optimizing, defect saws that remove undesired product from hardwood flooring, just before entering our precision end-matcher.  These four saws process 500 lineal feet of wood per minute and cycle approximately 100,000 cuts per shift.  All defected wood fiber and sawdust is re-purposed for use as environmentally friendly; local animal bedding, wood fuel pellets and paper products.