Thread: VEXpro 2016
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Unread 10-12-2015, 23:41
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josesantos josesantos is offline
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FRC #0687 (Nerd Herd) (VRC #687z) & FRC #5499 (BHS Robotics)
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Re: VEXpro 2016

TL;DR: 775Pro looks good. New motor page is awesome. What is happening during the peak power test?

Glad to see a viable (and then some)* replacement for the 18V BB RS-775. Is the 775pro made by CCL/CIM? If so, they make all the high power (149 W+) FRC motors between the CIM, Mini CIM, BAG, and AndyMark 9015...

In any case, I was super stoked to see the new motors website. Consistent data from a reliable source is always a good thing when considering which motor(s) to use, and as student/motor nerd I think it's great how transparent VEX is about testing.

Speaking of which, can someone please explain to me what exactly is happening during the peak power test? From my understanding the motor is running open loop with a regulated power supply and receives a controlled "half stall" torque. Over time the power output (which I assume is actually measured velocity times controlled torque) decreases. Is the motor just heating up over time and therefore unable to produce as much mechanical work? Is the reduced maximum power permanent? Some of the motors look like they burn out before 3 minutes, but I wouldn't assume one way or the other for the sealed can motors.

*Awaiting a season's worth of stress testing for final opinions, but it definitely looks good on paper.
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CAMS Robotics, FIRST Team 687 The Nerd Herd 2010-Present
College Mentor 2013-Present // Design Chairman 2012-2013
Berkeley High Robotics, FIRST Team 5499 2014-Present
College Mentor 2014-Present

Last edited by josesantos : 11-12-2015 at 00:12. Reason: *more comment*
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