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Novak Super rooster- They won't tell me Amperage specs!!
QUESTION:Just got two super rooster speed controls to control drive motors (skid
steer) on a robot I'm building. I called Novak, and the only spec. they'd
give me was the one on their site of 320 forward amps- with the dreaded
asterisk. Of course that spec is for about a millisecond- does anyone know
the approximate amps I can draw through one of those? I'd like to know the
largest motor I can power with one and the number of continuous amps- I was
hoping for around 10 or so without any overheating or other problems. It's
very strange that the CSR refused to tell me even though it sounded like he
knew- and that they specify "no limit" on the motor size. That means I
could use a one turn motor- really I could just run the power out to a wire-
a direct short and it should be just fine by that line of thinking. I just
don't get it. In any replys please dumb down your motor definitions for me,
I'm not a rc racing pro, and I understand only the basics of the motors,
such as the lower number of turns a motor has the more amps it will draw and
I don't know if that means it will turn with more torque or higher speed or
both... what's the strongest (torquexspeed) motor that I can possibly
reliably run with this controller?
ANSWER: If they say "no limit," that means you should be able to pull 30 amps
continuous, at mostly full throttle. If you are planning on running at
partial throttle for a whole bunch (like you might with a robot), you may
need to install a cooling fan on a heatsink if you're pulling more than 10
or so amps.
However, if they were to post real information, consumers could make
a reasonable comparison between the different products. Also, lots of
people wouldn't understand the specifications.
If you're limiting yourself to R/C car motors, you're doing yourself a big
disservice. R/C motors are very innefficient for the power they put out
due to rule restrictions. Power output is torque * speed, so if that's
what you're aiming for, look elsewhere for better motors.
I have run my Super rooster with dual 12 turns and no problem that is like a
6 turn single motor. i have run it off my power supply at 12 volts and 30
amps and i got it hot but it never went into thermal shutdown.
I think a good rule of thum is 20% of the "Rated" power is about what it
will realy handle or in th SR case 64 amps this would be a one minute deal
not a constant all day kinda spec.
you say you are looking for about 10 amps that is no problem at all you
could easily get 30-40 amps with out "over heating"
i would say you could run a 12 turn with no chance of overheating at all
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