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Need Paddle Control
SavannahLion:
--- Quote from: RandyT link=topic=122591.msg1301981#msg1301981 ---2 spring approach: More parts. Center will require some tweaking and may move when the springs start to wear. A means of tweaking the center point might be a good idea for maintenance. The main advantage is that, depending on how the springs are arranged, a more even resistance is possible.
--- End quote ---
Yeah, small cable tensioner might fit the bill. Or a length of cable drawn through a pair of nuts for each spring will do the trick. Though one could pre-tension a nice stiff spring in a similar arrangement as PL1 suggests will ensure a nice long life. This is exactly how some gate springs are set up.
PL1:
Even small turnbuckles are too big for this project.
You could move the eye bolt to the end and use a nut to adjust the tension like below or you could use the original design and increase the tension by using a loop of mechanic's wire (also called safety wire) shaped like this that you can tighten by turning the twisted end to make the loop smaller.
Scott
P.S. Edited the earlier diagram to correct the spring placement in the end view.
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