How to calculate speed and torque

[terry]

If this is for a h/w then mod2.

[webby]

whats mod 2? and its for a house robot

[maddox10]

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.

[webby]

it will only weigh 100kg

[maddox10]

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.

[Bacon Wizard]

moved elsewhere

[webby]

I do understand that, but testing has taken place with a 100kg load and it works fine but would have to travel around 3-5mph not the anticipated 10mph

[webby]

moved elsewhere

what does that mean?

[Bacon Wizard]

I posted, but then decided it should go on another thread, so I moved it.

[webby]

Ah ok, cool

[maddox10]

I do understand that, but testing has taken place with a 100kg load and it works fine but would have to travel around 3-5mph not the anticipated 10mph

Then you won't need a gear-up of 5-1, 3.5-1 or whatever. A 2-1 will do. 40 teeth on the motor, 20 teeth on the wheels.

In any case, for a housebot, 250W sounds extreem low power. If you know that the "original housebots" used motors like the Briggs & Stratton Etec with 11 kw of power and gazillions of Nm torque....

[terry]

Where is the h/w house robot going to be used ?