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Old 09-04-2005, 10:04 AM   #1
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Default How would you use to describe the linearity of a ESC

How would you mapping the throttle trigger with the car's behaviour to describe the linearity of a ESC.

- directly mapping the trigger position with the speed of the car? Or
- Mapping the trigger position with the acceleration ability???

Assume that no response time-lag between the finger and the ESC?

Would anyone willing to share your experience/opinion on this topic?
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Old 09-04-2005, 11:25 AM   #2
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Well, the way I see it, I'd have to say it's the voltage going to the motor (or acceleration ability as you put it) that is directly proportional by default, unless it's programmed with a curve on the ESC or the controller (most likely way).

As quick RC cars are to reponding to controls, the actual "speed" of the car will never be proportional to the trigger, just because there's inertia of the car's weight resulting in coasting, whether it's moving or stopped, friction (or lack thereof) of the tires and surface, drivetrain, motor, etc. Eventually it will catch up to your trigger position, but won't be instant.

To be overly simplistic, just go down a straight at full speed, and let go of the trigger. The car's speed will coast down to a stop eventually, but the engine's power is indeed at zero, just like your trigger indicates.
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