Thread: 2349's drive
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Unread 13-01-2008, 21:11
Lawry Goldstein Lawry Goldstein is offline
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Re: 2349's drive

First of all, WOW! That is a great job of first time modeling. You already have a great start, so keep practicing.
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As for the more helpful part of my post, I just wanted to give you a quick heads-up to make sure you understand the electrical limitations.

Here is the basic problem:
Each CIM has to be run off a Victor; each Victor is generally run off the 40 amp breaker. The main robot breaker is only rated for 120 amps continuous current.

*Quick Math*

That means if you’re driving at full power your running at 160 amps which is more than your robot can run consistently, so while it will work be careful because if you have a compressor running (20 amps) and possibly some motors for a feature (20-30 amps each) you could very quickly overrun both your breakers and your battery.

Understand that this doesn't mean you can't do it, for example if you have seen 'crab' drives, they run 4 CIMs as well as 1-2 motors for rotating those CIMs plus features. I mention this so that you understand you can run these motors over the 120 amp breaker since it is a CONTINOUS breaker, but you cannot run everything for 2 minutes. Try and finish building your drivetrain with time to drive the robot around and see what happens over 2 minutes, put in a new battery and drive it for another 2 minutes. This is unfortunately what happens sometimes during competitions, so you may need to have a few bottles of 'compressed air' so that you can cool the breakers during heavy back-to-back matches.
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