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Re: 233 telescoping arms how do they work?
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Re: 233 telescoping arms how do they work?
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Re: 233 telescoping arms how do they work?
good one Sean, and you are correct on your earlier post about the passive drive of the third stage on pinks tower.
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Re: 233 telescoping arms how do they work?
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Re: 233 telescoping arms how do they work?
we have done many lift's with bosch 20 series with custom sliders and cable but that has it's limitations, mainly strength and weight.
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Re: 233 telescoping arms how do they work?
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Seconded. These are some great idea to digest! Many thanks as well! |
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EDIT: I ask because I'm only familiar with the coil style constant force springs and if you used those I'm curious how they were implemented. |
Re: 233 telescoping arms how do they work?
Try looking up negator spring or constant force spring motor. It's a really nicely packed solution to the counterbalance problem. Ill update this when I'm at a computer with some links Ect.
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Re: 233 telescoping arms how do they work?
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EDIT: would someone familiar with the 254 system we willing to describe or diagram that system? From looking at all the pictures, I believe they use a different concept. |
Re: 233 telescoping arms how do they work?
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Re: 233 telescoping arms how do they work?
Thanks for all of the helpful insight.
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Re: 233 telescoping arms how do they work?
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After looking through the pictures referenced earlier in the thread, I was able to better understand the 254 telescopic arm. It is conceptually very different from the 233 arm.
We attempted to build a nylon strap driven arm, similar in concept to the 254 design, and found it very difficult to get all the rollers, idler pulleys, and pieces of slippery UHMW from colliding with each other. In the end we ran out of time, kept the first stage, and just implemented a first level hanger. The devil is definitely in the details with these mechanisms. |
Re: 233 telescoping arms how do they work?
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Re: 233 telescoping arms how do they work?
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Re: 233 telescoping arms how do they work?
What did 254 and 233 do to pin the chain/belt to a stage? I'm wondering if they put bolts through the chain/belt, pinched the chain/belt against a toothed surface, or did something else. I'm guessing they might have had different methods since 254 used a belt and 233 used chain.
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