You want a 5-1 ratio then.
Meaning the gear on the motor needs 5 times more teeth than the one on the wheel.
That will give you a theoretical end speed of 16.5km/h. A tad fast for the motors.
I would suggest a 3.5-1 ratio. End speed 11.5km/h
If you need more speed, you can always go 36V.
Last edited by maddox10; 13th April 2013 at 12:07.
wow ok thanks
so like a 50 tooth on the motor and 10 tooth on the wheel? (example)
Yep. But I would use a few more teeth. Is just that tad stronger.
if your motor is 117rpm and you want the wheel to do 400rpm then you will needto gear up 3.42 - 1.
eg- 41t motor gear and 12t gear on wheel.
Ok great, thanks
If this is for a h/w then mod2.
whats mod 2? and its for a house robot
Mod 2. Module 2. Module is the European system for gears. Module 2 is therefore "Gear, European standard, size 2"
But that's for chainless purposes.
And a housebot or not, 250W per motor, unless you're going to use at least 4, won't give a heavy with any suitable drive capabilities.
it will only weigh 100kg
Webby, a standard motor in a heavy is a Bosch GPA 750. At least 3 times stronger than your wheelchair motors, and that's without overvolting.Originally Posted by webby
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