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Posts: 5
Posted: 2012-04-11 00:39 
 Post subject: Drive System
Hello, I am looking for some help in building a drive system for a 2-wheeled robot. the robot is likely to be about 20 pounds with a wheel radius of around 5 inches. I am hoping to achieve a decent pace with it, but it needs power also, i'm looking to power a funky wheel/track drive and be able to climb stairs and steep inclines. One more thing, my budget for the entire robot is a hopeful $250, so price is definitely an object.
Thanks Alot!
Ryan


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Posts: 1019
Posted: 2012-04-11 08:12 
 Post subject: Re: Drive System
Using tracks is a proven, brute force method of climbing stairs, but is not very cheap. Every gram increases the power required by the motors substantially. The motors are going to be about $50 each, for a total of ~$100. You can get a sense of just how much torque you'll need using the Drive Motor Sizing Tool. The microcontroller will be about $30 and the motor controller for these motors about $90 - already you're almost at $250 and still need a battery, tracks, sprockets, frame etc. and shipping / taxes. You would need to make your own tracks (perhaps using bike chain and sprockets). The better option is to make the robot a lot lighter.

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Posts: 5
Posted: 2012-04-11 14:08 
 Post subject: Re: Drive System
Thanks a lot, here's the idea http://www.youtube.com/watch?v=luX_0Ek8cqc Any help with finding a suitable pair of motors would be greatly appreciated, having real trouble with that one. as for the weight, perhaps 15 pounds. and yes, i have a plan to make my own treads


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Posted: 2012-04-11 14:28 
 Post subject: Re: Drive System
If you're able to reproduce that robot for less than $250.. that would be amazing. As for motors, what did the Drive motor sizing tool give you? We get about 500oz-in at ~100rpm. This would be something like RB-Rbo-78 (64:1 P60 Gearbox with RS555 Motor).

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Coleman Benson

RobotShop inc.
Putting Robotics at your service!™
www.robotshop.com

Lynxmotion
Imagine it. Build it. Control it.™
http://www.Lynxmotion.com


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Posts: 5
Posted: 2012-04-21 07:35 
 Post subject: Re: Drive System
After many, many, hours of searching, i may have found a motor. Will this work? http://www.robotmarketplace.com/products/AME-210-1010.html


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Posted: 2012-04-23 08:05 
 Post subject: Re: Drive System
Looks promising, but use the drive motor sizing too to figure out exactly what torque and rpm you will need an then compare it to this motor.

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Coleman Benson

RobotShop inc.
Putting Robotics at your service!™
www.robotshop.com

Lynxmotion
Imagine it. Build it. Control it.™
http://www.Lynxmotion.com


 

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