Quote:
Originally Posted by Chris is me
4 is complete overkill. They're roughly 240W motors if I recall correctly - think the equivalent of a 2010 FP motor.
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~390 if I did my math correctly; ~(voltage)*(stall current)/4 = (12)*(130)/4 = 390 (not factoring in motor inefficiency)
Also, the 2010 FPs had roughly 190w. This year's have 290w. (Both figures from the FIRST motor curves)
Quote:
Originally Posted by noa_n_f
Thanks for the fast responses. If I go for two RS775, what typ of gear ratios should I be looking for? It will be a parallel lift with a diagonal surgical tubing assist. I'm looking to making the arm raise and lower as quickly as possible without worrying about the motors not being able to handle it.
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The reduction we're going with is a 512:1 (256:1 with banebots gearbox, and then 2:1 with sprocket). This gives us ~576 lb-ft of torque if you go with 65% gearbox efficiency, which is more than enough to lift it, while we still have 25RPM, which is 150deg/s.