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Old 12-02-2002, 06:27 PM   #1
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Default Adjustable Travel Volume (ATV)?

Can anyone please tell me the use of ATV for both steering and throttle in a radio controller? Looking forward to your inputs
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Old 12-02-2002, 08:10 PM   #2
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ATV changes the relationship between the amount you turn the wheel and the amount the servo moves.

A high ATV setting means the servo moves a lot, a low setting means the servo moves a little.

It's a way to change the turning radius of your car.
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Old 12-03-2002, 05:15 AM   #3
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ATV is where you limit (or increase in some cases) the servo's maximum travel.

This helps stop the servo from straining at full steering lock, for example, or lets you reach full throttle in a gas car, if the servo as standard isn't fully opening the carb.

It's the "first level" of setting up the servos in a car.

If you want to tune the amount of steering throw you have, for example, DON'T use the ATV (also called End Points/EPA) control. You should use the steering Dual Rate (D/R), for example setting it at 80 or 90 percent to get less steering on the track.

Dual Rate is the "second level" of servo adjustment.

ATV should be set with the Dual Rate at maximum.
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Old 12-03-2002, 05:51 AM   #4
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hello,

ATV is adjustable travel volume, this does the following:

In steering it limits the maximum amount you can turn the wheels (say 15 degrees rather than 20etc). This is useful if you are on a very loose surface where too much steering can cause the car to oversteer.

in electric throttle make sure its set at maximum otherwise you will lose full speed.

in gas throttle it sets the point at which the throttle valve is opened fully and doesn't give you a dead band where nothing happens.

Dual Rate alters the steering sensitivity. instead of having a linear relationship between the controller and the actual car, the realtionship becomes exponentional. best illustrated by an example.

with linear (dual rate =0%)
5 degrees movement on the steerwheel causes 5 degrees on the servo

with dual rate =100%
5 degrees on the steerwheel causes 12 degrees of movement on the servo.

the actual maximum amount the steering moves is the same in both cases, but the dual rate causes more sensitivy nearer to neutral.

i hope this helps, as it may be a bit confusing.

cheers

sanj
www.schumacher.clara.net
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Old 12-03-2002, 05:18 PM   #5
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Sanj my dear fellow - you've got the "Dual rate" wrong.

If you set the "dual rate" knob to 0% you will have zero steering movement.

You are confusing the dual rate with the steering exponential - that's what sets the curve.
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Old 12-03-2002, 06:51 PM   #6
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MANY THANKS FOR YOUR INPUTS.
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Old 12-04-2002, 05:26 AM   #7
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whoops sorry.

sanj
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