User's Manual
27
4.4. TC = traction control (PROFI CAR 707 only)
Traction Control is a variant of the SLOW function applied to THROTTLE, in this case
only working when you open the throttle. When you close the throttle, the servo (or
speed controller) responds normally, i.e. without any delay.
Traction Control prevents the wheels spinning during acceleration on a smooth
track. In the case of electric cars TC reduces current drain, because the motor is
controlled more „gently“.
There are two parameters to be set for Traction Control:
1. T = Time, between 0 and 2.0 sec
Time factor for retarding the throttle servo
2. ACC = Acceleration, between 0 and 10
works in a similar way to EXPO
The diagram on the right shows
how you can imagine the effect of
the TC function.
We will assume that you want the
throttle to move from the ACTUAL
position to the NOMINAL position
(see labels on graph), because you
have moved the trigger slightly in
the direction of full throttle.
Without TC this change takes place
at a rate determined by the servo’s
transit speed (see curve 1).
If you set the parameter T (= time) for Traction Control to the maximum value 2.0, the
movement of the servo is retarded, but the line of the graph remains linear (curve 2).
If we now add a little ACC to the mix, we obtain the desired line as shown by curve 3.
Initially the throttle opens slowly (thereby preventing the wheels spinning), but the
rate of opening then increases steadily. This set-up shortens the total duration of the
servo’s movement, but without losing the advantage of the „gentle“ start-up.
This is the procedure:
§ Search for the menu point TC using the A button.
§ Select T or ACC using the handle button
G
.
§ Set the value you want using the digi-adjustor.
Press any menu button (except A ) to return to the operating display.