4 - 3. For the bearing/support/shaft assembly there are...

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3. For the bearing/support/shaft assembly there are also pros and cons. A constructive quality of this assembly is that the vise grip provided a good support for the shaft system. This helped minimize the amount of outside interference. Also the Kevlar thread is very strong, which allowed a sizeable load to be lifted without stretching or breaking. However, there was a lot of friction that could have been avoided. A lot of friction was presented between the support and the shaft, since the contact was purely metal on plastic collision, with no lubrication. It is also possible that the Kevlar thread might tangle while the shaft is spinning which would result in the excessive fiction. Another setback in the setup is that while the thread was being retracted, the load swung back and forth. This gave an unstable load to the shaft, and thus to the motor. 4. Put threads in the shaft to allow the Kevlar string to wind without overlapping Lubricate EVERYTHING!!!!!!!!! Use a cylindrical mass, and pull it up through a smooth cylindrical tunnel
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This note was uploaded on 03/18/2011 for the course ME 250 taught by Professor Dutta during the Winter '07 term at University of Michigan.

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4 - 3. For the bearing/support/shaft assembly there are...

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