Quote:
Originally Posted by GeeTwo
Yes, and that's exactly why. A 2-inch diameter bore cylinder exerts a force of 157-188 pounds when pressurized with 50-60 psi. We only wanted about 30-40 pounds to be carried by the strafe wheel, so we applied it with a short lever arm. As noted on the preceding image, we were building with parts already in stock. If we'd had a 3/4" or 1" bore cylinder with a 2-4" stroke, we'd have mounted it much farther from the pivot.
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A much better solution: Mount the cylinder away from the pivot and use a regulator to lower the pressure in your 2 inch diameter cylinder until you get the desired amount of weight carried by your strafe wheel.
Also, I feel sorry for the bending moments in that bar stock supporting the nose of your cylinder. I recommend putting a 2x4 or something on there to better support the load. **Edit, could be angle stock? If so, no problemo**
-Mike
Just as you and your team will make hard decisions as you struggle to build a robot, FIRST has had to make hard decisions concerning maximizing safety while making the number of rules as small as possible. - Mike Betts [more] 
18-12-2015, 11:56
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