Rotary encoder for 4wd bot

Hi :-)

I'm building my first bot with 4WD. I've read in a number of places that the use of encoders is strongly recommended. I have no experience with encoders. I will guess that they somehow help to keep all motors spinning at the same speed?

I've looked for arduino examples using encoders for 4wd bots but have been unsuccessful. Nick, I've seen a post where you were starting a 4wd bot but hadn't implemented the encoders. Have you progressed with your project? Can you point me to some explanation about the role of encoders with 4wd bots as well as code examples?

BTW, I'm using this controller: http://www.robotshop.com/dagu-4-channel-brushed-dc-motor-controller-2.html

Thanks in advance for any help you can provide,

Todd

Sounds like my controller.

I would rather answer this on the Arduino forum rather than splitting up between two forums. Make a post there, and put the link to it here if you like, if I haven't noticed it.

http://arduino.cc/forum/

Thanks :-) I've made the post here http://arduino.cc/forum/index.php/topic,105898.0.html

Any help or guidance would be greatly appreciated.

Todd