Large size wheels to fit on cordless drill motors

[psycho_fling]

well gearing down is fairly simple to get in your mind but doing it is the harder part

ok say you want a ratio of 10:1 which means you want the wheel to turn a 10th of the speed of the motor you could use in a one stage gear box (ie just to gears) a 10 tooth gear on motor and a 100 tooth gear on wheel

this would give the desired result

it gets complex when you introduce more stages more stages come into it when you want like 512:1 for example have alook at the below ratio calculator

http://www.technobotsonline.com/gearbox ... lator.html

alex

[George_TeamZog]

Well what would you suggest? Do you want the measurements for the robot (minus the axe handle and axe), and where I intend to put the drill motors? I'm going to try and get as much help from the experts as I can, rather than jumping ahead, as I usually do

[rallikas]

Make your own wheels from nylon or something!

[psycho_fling]

yeh give us some more info then it's easier to suggest how to do things and what wheels to buy to suit all your robots needs

[craig_colliass]

Hi when it comes to big wheel robots perhaps I may be able to help, The Saint has 600mm wheels but with the tyres they are 670mm diameter the Mighty Seraph (Feather weight robot) has a wheel diameter of 500mm.

Material used UHMWPE or the green stuff from Plastics Direct Bolt the tyre on I used bike tyres for both robots.

The transmission, the rule of thumb would be double the diameter of the wheel, half the speed of the wheel, to get the same speed for the robot.

So if you connected a sprocket to the drill motor say 12 tooth sprocket, and the wheel had a 24 tooth sprocket, the speed of the 200mm diameter wheel robot would be the same as an equivalent 100mm diameter wheel robot.

Hope this helps