A messy powder filler is fed by a pair of pneumatic indexing cylinders. They gate bottles into the filler one at a time. But there is a problem: When you start the line it runs perfectly. Crisp, fast index strokes. About two minutes in, the cylinders start getting lazy. Strokes slow down. Bottles start arriving late. Then the indexers barely move and the filler starves. Stop the line for a bit. Restart. Perfect again... for about two minutes. Over and over. All shift. You hav