Mecanum Drive overdraw

[coolhandluke811]

Hello everyone,

Description of issue:
-first year seriously considering mecanum drive on a competition bot, played with it last year
-after adding robot level weight to our mecanum (using old dead batteries), we began to experience dramatic drop in Battery Charge. In simulating a match (2:30 sec), driving around at 100% speed, and some pneumatic operation, the battery charge would drop from 130% to 65-75%
-After each cycle, the cims, battery lead, and talons would be fairly hot
-After testing the bot in tank mode, the battery dropped only a difference of 10%

Theories regarding issue roots:
-wheels aren't perfectly aligned, with a difference of about 1 in L vs W.
-amperage issue? we aren't currently monitoring amperage pull per cim and my controls people don't seem to have any clue as to how. I've heard the number 15 for amps, but I don't know how much we are pulling.
-hardware failure? control board or other major board is failing?

ruled out:
-not a singular battery issue
-likely not a battery beak issue

Any ideas or comments would be greatly appreciated. We really don't want the purchase of wheels to go to waste and interfere with out strategy.

Thanks,
Luke