Program a machine that applies acid to precision-etch metal and plastic.
Tends machine that garnetts waste yarn and fibers and compresses garnetted fibers into rolls of felt, batting, or padding: Moves weight on lever of automatic feeder to control amount of waste material fed into machine and weight of product produced. Spaces knives on either side of delivery end of machine according to width specified for rolls. Turns handwheel to increase or decrease space between compressor roller according to thickness specified for product. Threads end of garnetted material through folding device that spreads layers of material on delivery table preparatory to winding web into rolls.