Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: saba_rish91 on August 22, 2012, 11:23:32 AM

Title: Selecting proper motor!
Post by: saba_rish91 on August 22, 2012, 11:23:32 AM
Hi,

I'm planning to build a line following robot and I'm unable to decide a proper motor for that purpose.

In the motor spec, it says 0.6kg-cm. What does that imply? Does it mean that it can comfortably push 600gms if the motor is attached to a 1cm radius wheel?

http://www.pololu.com/catalog/product/2212 (http://www.pololu.com/catalog/product/2212)
Title: Re: Selecting proper motor!
Post by: jkerns on August 22, 2012, 12:32:18 PM
Not quite that simple - yes you generate a 600 "gram" force, but a wheeled robot on a horizontal surface that weighs 600 grams does not need that much force to move.

Also, that appears to be the stall torque - the torque generated when the motor is not turning. As the motor speeds up, the torque is reduced.

http://www.societyofrobots.com/mechanics_dynamics.shtml (http://www.societyofrobots.com/mechanics_dynamics.shtml)

There is a link to a motor calculator there as well.