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Unread 18-10-2012, 12:27
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Re: Elevator/Telescopic Arms & Motors to Use

Quote:
Originally Posted by Ravage457 View Post
Hello Chief Delphi Communty

Im Back for more wisdom from the FRC and CD community
Ive been intrested in knowing what is the most simple arm to build, an elevator or telescopic arm and how to prevent it from over extending, another question is do yall use Bearings in the arms to allow it to travel free?
The best arm is the one your team has the capability of building. If you don't know how to do it, prototype first.

To prevent overextending you can:
put in hard stops (don't stall your motors !!)
Put in an encoder (use software to stop the travel)
Put in limit switches (can be used for software stops or hardware -Jags- stops)

Using bearings is, usually, preferrable.

Quote:
Originally Posted by Ravage457 View Post
Also, how do yall run the pnuematics and electrionc wires in this type of arms and keep them from getting pinched or ripped apart
Create a travel conduit with a looped back wire/tube set. Use rubber bands / surgical tubing to retract the excess wire when the arm retracts.

Quote:
Originally Posted by Ravage457 View Post
What motors are also good to use with this arms?
If you have any pictures it greatly appreciated. I know im probably asking alot, but i really want to improve my knowledge and better and to improve our team. Thanks again for taking your time, and giving me yall advice and recommendations
Any motor will move an arm with the proper gear reduction. What you need to ask yourself is 'how long do I want it to take to extend/retract the arm under worst case conditions' and size the motor accordingly. You may want to look at assisting the motor in a particular direction (gas shock?) if the load in 1 direction is far more than in the reverse direction.
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