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Unread 23-06-2009, 13:01
EricVanWyk EricVanWyk is offline
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Re: pic: cRIO CAN Jag

Quote:
Originally Posted by Elgin Clock View Post
Ok, I'm gonna get some n00b flack on this one, but what exactly am I looking at and how is it different than the setup we had this year??
I see the same components, & only with the addition of a telephone/modem/fax type cable added to the components similar to the way VEX uses to hook up controllers, I don't see much speculation that can come from this?

So... what's the big deal & all the fuss about?
And what the heck is CAN?
Just a little lost over here... I'm mechanical, not electrical! lol
CAN is a method of communication that allows many devices to talk to each other. Think of it as ethernet, but much simpler.

PWM (as we use it) is a method of communication that allows one device to command another: One piece of information, one direction.

The advantage CAN provides is that more types of information can be sent, and it is bi-directional. This would potentially allow you to:
  • Access the Jaguars back-emf and current measuring capabilities.
  • Current and voltage control, rather than just duty cycle control.
  • Internal PID loops
  • Virtual Springs - Combine torque(current) control with built-in quadrature encoder/pot inputs.
  • Active load-sharing: Have motors that share a tough-box balance their loads.
  • Lots of other cool stuff.
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