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Unread 25-02-2012, 14:04
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dsirovica dsirovica is offline
Programming and Electrical Mentor
AKA: Dean Sirovica
FRC #1458 (Red Ties)
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Re: Jaguars vs Victors

We have abandoned Jags in favor of Victors two days before bag-day!
Apparently this is a yearly tradition on our team

We also started with 6 wheels, 2 CIMs on CIMple boxes and had friction issues on carpet. Covering wheels with duct tape worked but not cool, so we eventually lost the midddle wheels. The Jags kept cutting out, the Victors don't.

Jags have 2 MOSFETs per H-Bridge link, Victors have 3, and I don't think Victors have a cuttout like the Jags.

I agree with prior comments that this is NOT the way to solve this problem as Jags (one assumes are designed corrctly...) are cutting out for safety reason. As a result we can "fry an egg on the CIMs"! and we can barely make it through a match on one battery.

Turning from standstill is the biggest current drain - 90A per CIM!
Moving first helps a lot.

I suspect that 2 CIMs is simply too weak for a 120lb bot. Gearing down would be the best solution for us, however its bagged...