Quote:
Originally Posted by billbo911
Got a Dyno we can test with?? If your assertions are correct, that would explain a lot.
Seriously, how many times have you run all the calculations and built a design only to see it's performance not live up the the numbers?
THAT REALLY BITES!
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I sort of dyno'd them with our 2012 robot.
In 2012 we only had 4-6 of the Fisher Price motor that was real high power, so we saved them for comp. Ran 550's on the practice bot.
The practice bot performed way worse in terms of spinup time and peak rpm. The 550's had lower ratings than the FP's, but not by enough to explain it. I repeated the test on the same robot with the FPs, 550s, the andymark 9015's and some 550 sized mabuchi motors I bought surplus.
I characterized the flywheel roughly in terms of friction (a polynomial in the form Ax^2 +Bc + C) and all the motors matched with their specs pretty well... except the 550's.
Not the most scientific test as I wasn't measuring torque directly, but I'm reasonably certain the banebots 550's are not as powerful as claimed. Unsure if this was a batch issue, a supplier misleading banebots, banebots mislabeling, etc...