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Topic: Controlling DC motors with km/h (Read 575 times) previous topic - next topic

idoraizman

Hello! I am kind'a new to the arduino world...
My project includes 2 12v dc motors that I need to send them values in km/h... how can I do that?
thanks for the help!

Cactusface

Hi,
    First of all do some maths! how big are your wheels, what kind of RPM do you hope to get from your motors...

You've told us nothing, how can we help!!  Tell us more if you want an hand.....
Open your mind! But not too far, your brains might fall out.
Also like Photography, model building and my 300+ Cacti and Succs.

slipstick

What motors? Are they driving wheels? Or tracks? Or propellers? Or ducted fans? Or?

With direct driven wheels you can get a reasonable approximation to speed by controlling the PWM used to drive the motors but you'll need to calibrate it and it will be affected by things like the surface and the load. So it's not easy to get much real accuracy.

Steve

jremington

Tutorials on how to select motors, wheels, calculate robot velocity etc are at the Society of Robots page.

idoraizman

Hi!
The motors aren't used to drive the robot... they are used for launching mechanism so they are not connected to surface and there are not load on them...
The radius of the wheels is 10 cm.

jremington

Robots and launching mechanisms obey the same physical laws.

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