Motor sizing problem - Online calculators
January 20, 2011
I need two motors for my new robot and I used two online calculators to make the motor selection:
but I've got different results.
My input data:
- mass 7Kg
- 2 drive motors
- wheel radius 0.037 m
- velocity 0.38 m/s
- acceleration 0.2 m/s^2
- efficiency 65%
- maximum incline angle 20 degree
- Society of Robots: RMF 2.02 kg*m*rps, zero incline 0.214 kg*m*rps
- RobotShop.com: torque 3.87 kgf-cm
A motor like Pololu 67:1 Metal Gearmotor (150 RPM free running, 14kg-cm stall torque), according to Society of Robots is good only for zero incline angle and according to RobotShop.com is overkill even for 10 degree angle.
Which one should I trust ?