Thread: Gearing/motor questions.
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Unread 22-01-2005, 23:10
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Raul Raul is offline
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Re: Gearing/motor questions.
I cannot recommend a gearing based on the information provided.

I do want to caution you on using a cascading extension lift for too many extension sections. The forces on your bottom cable will get very high. As I recall it is an exponential increase with each extension section (2 to the x power - where x is the number of extensions above the fixed one). Do a free body diagram of each section to figure out the tension on each cable and you will see what I mean.

Raul
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Warning: this reply is just an approximation of what I meant to convey - engineers cannot possibly use just written words to express what they are thinking.