Length control method and apparatus
Abstract
Abstract A METHOD AND APPARATUS FOR AUTOMATICALLY AND ACCURATELY CONTROLLING THE LENGTH OF CUTS MADE ON A CONTINUOUSLY RUNNING STRIP OF FEED STOCK. A COMPARISON CIRCUIT RECEIVES INFORMATION ON THE LENGTH OF CUT BEING MADE BY A BLADE DEVICE, COMPARES THIS WITH A PRE-SET LENGTH VALUE, AND PRODUCES AN ERROR SIGNAL IF ANY LENGTH CORRECTION IS REQUIRED. THE ERROR SIGNAL ACTUATES AN ADJUSTING MOTOR TO OPERATE IN THE REQUIRED DIRECTION AND VARY THE SPEED RATIO OF A TRANSMISSION THROUGH AN ADJUSTING MECHANISM TO ADJUST THE TIMED RELATIONSHIP OF BLADE CUT WITH RESPECT TO MATERIAL FEED RATE. THE ADJUSTING MOTOR IS STOPPED WHEN THE LENGTH OF CUT IS VARIED THE REQUIRED AMOUNT BY A CIRCUIT WHICH FOLLOWS THE NON-LINEAR CURVE OF LENGTH OF CUT AS A FUNCTION OF ADJUSTING MECHANISM OPERATION.
Inventors
- 👤 Robert W Schmidt
Bibliographic Details
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