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Forums
Engineering
Mechanical Engineering
Solving the Rewinding Tension Control Puzzle: A Production Engineer's Story
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[QUOTE="jrmichler, post: 6659323, member: 638574"] I strongly recommend that you get a copy of The Mechanics of Winding, by David R. Roisum. It's out of print, but Amazon has it as a used book. David Roisum also published the Mechanics of Web Handling and The Mechanics of Rollers. All three of those are highly recommended for a person in your situation. I have not read his more recent book, The Web Handling Handbook. If it has as much information on winding as his winding book, it might be a better book to buy. Winding tension at 25% of tensile strength is a realistic upper limit for a manually controlled machine. Winding a good quality roll normally requires a tension profile, where the web tension is varied while the roll builds, although constant tension may work if your tape is stiff enough. The Roisum book on winding goes into why you need to do what in order to build quality rolls. The subject cannot be summarized in a forum post. I recommend that you not try to calibrate everything. Instead, start winding product. Find what happens if the tension is too high, and what happens if the tension is too low. Use halfway between as the suggested tension. That tension will be different for each product code. Do this for a range of products (stiff, stretchy, soft, hard), then correlate to tensile strength, stiffness, and hardness. You should be able to derive an empirical relationship to winding variables. You can buy tension measuring rolls to measure web tension. Here's a good place to start looking: [URL]https://dfe.com/applications/web-tension-control/[/URL]. I think that's the manufacturer of the last web tension roll that I bought. You will also need strain gauge signal conditioners and readout instrumentation. But first, BUY THE BOOK. [/QUOTE]
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Solving the Rewinding Tension Control Puzzle: A Production Engineer's Story
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