Quote:
Originally Posted by Ether
It's possible (but quite a bit of work) to model all these parameters accurately. With the right equipment and setup, a test would yield the answer.
|
One possible test set-up could be a brake dynamometer, a two-motor gearbox (e.g., AM CIMple Box included in recent FRC kits), thermocoupled CIM and mini-CIM motors, and a laboratory dc supply capable of feeding the motors at 12 Volts, with combined current draw up to 84 Ampere. I have all that on hand. The CIMple Box ratio is 4.67:1. Test loads of interest might be 4, 5, and 6 Newton-meter at the CIMple box output shaft -- loads beyond that would require more current than my supply can deliver. At each load, the test procedure would be to record temperature rise until the brush guide reaches 125 degrees Celsius and compare the plots, CIM vs. mini-CIM.
Please check my figures above and suggest changes.
__________________
Richard Wallace
Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
since 2003
I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)
...or it might be good to avoid doing stupid things like smashing a thin metal casing with a steel hammer... - Cory [more] 
08-06-2013, 16:07
Threaded Mode