Lynxmotion Tech Support

Yeah so I'm building one of my own robot arms for a custom project and needed a bit of helP. I have the lengths of the arms. But I'm not really sure how to calculate the necessary torque for he servos. I have done quite a bit Of searching online and cOuldnt find much that cOuld helP. So that's why I'm asking here. I mainly need to calculate the required torque for the servos. If anyone can helP I would greAtly appreciate it. I aPologize for my typing. I am on an iPod right now and it sucks at typing.

Google is your friend with sites like below.

http://www.calculatoredge.com/new/torque.htm

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Why I like my 2005 rio yellow Honda S2000 with the top down, and more!
http://youtube.com/watch?v=pWjMvrkUqX0
http://youtube.com/watch?v=qfyRA-g1nhI
http://web.comporium.net/~shb/S2000video.htm

Thanks for that site, one thing is though, I'm not really sure how much force I want in the arms. The arms will probably be around 16-20" longs with the grippers. At minimum I want it to be able to hold at least 5 lbs per arm.

Haha...
better go with something else than servo.

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Eric Nantel
Qc Canada

Always liked Robot... Now i am learning to make some...! Wonderfull...

You won't be able to do this with the typical servos.You might consider linear actuators to make the arm.

_________________
Why I like my 2005 rio yellow Honda S2000 with the top down, and more!
http://youtube.com/watch?v=pWjMvrkUqX0
http://youtube.com/watch?v=qfyRA-g1nhI
http://web.comporium.net/~shb/S2000video.htm

I thought about using actuators before, but I'm not really sure how I would incorporate them into the design of the robot. All of the actuators I have seen online, are bulky as all hell. I guess I could sacrifice the weight lifting if it turns out that I have to use servos. I will be building this robot in the future, but right now, I'm concentrating on the arms. I'm not really sure what would be best for this type of robot.

There is a large gap between what is seen in the movies and can be drawn to what can be built with normal funding and skills. The arms you have drawn will probably be very difficult and expensive to make.

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Why I like my 2005 rio yellow Honda S2000 with the top down, and more!
http://youtube.com/watch?v=pWjMvrkUqX0
http://youtube.com/watch?v=qfyRA-g1nhI
http://web.comporium.net/~shb/S2000video.htm

Well, that's the thing I already know how hard and long this is going to take me. I would still like to get it done though. The robot I am building does not have to be exactly like the one in the picture as I am going to be balancing it on a bowling ball instead of wheels for starters. Second I knew there were going to be limitations from the beginning. One of my electronics mentors suggested servos, but due to the length of the arms, they might have to be really big. And the only way I could think of using actuators, unless they make smaller ones somewhere, is to have them inside the robot pulling strong tethers that are connected to the arms.

All weight issues aside, as in pulling or picking up things, what do you guys think the best method for something like this would be.

Thank you for your time and help.

The position of occurrence of the side, cut, or it is zero.
Angular speed and speeding of the airplane is zero.
The side, cut, blend, and control areas are basic scale shape.

That's a cool looking robot. But, along the lines of what ZoomKat said, it's difficult to take cool then introduce functionality later. You're probably already well aware that there will need to be lots of compromises.

I would suggest using encoded motors with miter/bevel gears on the joints. The price could be comparable to servos but depending on the gear pairing you use you may be able to reach your goal of holding 5lbs. There would also be the added complexity of controlling them, though.

I like the idea of balancing on a ball, however I don't think I'd use a bowling ball. There'd be so much inertia that it'd be difficult to balance. The bot would likely fall over before you could get the ball up to speed.