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Can 100% punch control harm a MMM?
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Erevocanuck
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Can 100% punch control harm a MMM? - 07.08.2009, 06:27 PM

On the Traxxas forum theirs a person with a melted MMM beside huge/heavy tires & most likely over geared the person said
Quote:
My brakes are set at 30% and my punch at 100%
So is that bad to set the punch control that high?

Traxxas forum

Last edited by Erevocanuck; 07.08.2009 at 06:29 PM.
   
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BrianG
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07.08.2009, 06:30 PM

Shouldn't. That only downside is that you have less "snap" when you punch the throttle. When set high, the ESC integrates the throttle signal. So, even though you mash the throttle instantly, the ESC will internally ramp up the throttle slower over time. This can help reduce the huge current spike if the motor is trying to move a heavy vehicle from 0mph to 40mph in a split second.
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himalaya
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07.09.2009, 04:36 AM

+1 to Brian, higher punch control doesn't harm the ESC, on the contrary it might help the ESC with less stress thus survive longer .


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fastbaja5b
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07.11.2009, 10:01 AM

I was told however that if you run 100% punch control, you lose the ability to control the car mid air over a jump and thus control your landings.


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doo540
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07.11.2009, 10:09 AM

Why would having the punch set at 100% have anything to do with mid air control?
Brain just said it slows down how fast teh motor ramps up, not that the motor doesn't move at all. The motor just isn't as snapping, which I like when driving. All four of my brushless truck are set at 100% and they will still do standing back flips if I want them to.
   
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RC-Monster Mike
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07.11.2009, 10:26 AM

Sometimes mid air control requires a fairly quick thottle stab to get the front end up - 100% punch control inhibits the ability to do this. I hate to call you out, doo540, but I doubt you can do a standing backflip with 100% punch control on any "normal" vehicle setup - the throttle delay/ramp time will almost certainly prevent this from happening. A short wheelbase vehicle with large tires may flip on its lid, but I just don't see a standing backflip happening.
Punch control is useful for limiting amp draw and softening acceleration, but I find that it creates a "muddy" throttle feel in the mid to upper throttle range - timing on a track suffers in my experience.
   
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Happywing
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07.14.2009, 07:16 AM

Punch control is a good tool for track tuning, but needing 100% to maintain control, means something else is wrong with the setup. 100% definitely makes mid-air (nose-up) adjustments difficult.
   
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Sammus
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07.14.2009, 07:39 AM

like running an air esc in a car, except not as bad
   
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jzemaxx
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07.15.2009, 06:01 PM

No bottom end...... Sounds like a nitro car....LOL


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BrianG
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07.15.2009, 06:03 PM

Quote:
Originally Posted by jzemaxx View Post
No bottom end...... Sounds like a nitro car....LOL
lol, if that's the case, then at least those nitro guys won't whine as much because they can't keep up. Pretty bad though that even on the lowest power settings, a properly sized BL setup can still whip a nitro.
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Snipin_Willy
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07.17.2009, 12:29 AM

So, someone please explain: How can a high punch control setting affect motor temps or would there be much difference?
   
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Sammus
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07.17.2009, 12:30 AM

current draw is what causes heat and acceleration. more punch control means the motor wont accelerate its rpm as fast and its current draw wont be as high, so it should generate less heat.
   
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