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Unread 11-02-2013, 15:33
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Richard Wallace Richard Wallace is offline
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Re: Output Torque of CIMple Box with 2 CIMS

The CIMPle Box (am-0734) has 4.67:1 speed reduction ratio.

A CIM at maximum power will deliver a little more that 1.1 Newton-meter (10 lbf-in) torque at about 2600 RPM, running from 12V. A little while ago I posted some lab measurements of CIM temperature rise at maximum power.

To get 200 lbf-in at your winch, you will need to gear down the CIMPle Box output. To avoid working the CIM past its peak power point, you should use about 5:1 reduction after the gearbox.

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Edit: using two CIMs you will need less reduction after the gearbox, maybe 2.5:1 will be OK. Push it to 2:1 if you feel lucky. But as Ether said above, without reduction after the gearbox, it's not happening.
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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)

Last edited by Richard Wallace : 11-02-2013 at 15:36.