15
13. Trimming the controls
The trim serves primarily to correct a slight skew of the servo levers due to the linkage and the associated uneven
control movements. In addition, you still have the opportunity to slightly adjust the model during operation, for exam-
ple, when the drive is not straight although the steering wheel is in the central position.
The steering arms should be adjusted so that there is a 90° angle between the servo lever and the steering arms. This
will ensure that the model travels in a straight line.
The GT2+1 EVO remote control has a sensitive digital trim, with which the steering (CH1) and the driving functions
(CH2) can be set individually with two buttons, respectively.
a) Trimming the steering wheel
Press and hold the lower of the two trim buttons (-) for the
steering trim (see also Figure 2, Pos. 12). The green LED
display (see also Figure 2, Pos. 8) starts to flicker after
some time.
When the receiving system is switched on, the servo lever
of the steering servo will gradually turn from the centre
position to the end of the trim area.
When the green LED stops flickering and stays lit again,
the end of the trim range is reached and the servo lever
stops.
Now press and hold the upper of the two trim buttons (+)
for the steering trim (12). The green LED indicator (8)
starts to flicker again after some time and the servo lever
returns to the centre position.
If the green LED flashes twice briefly, release the trim button immediately. The centre position has been reached and
the set value is saved automatically. Even after switching off and on, the last set value is retained.
If the centre position of the digital trim for the steering has been set on the transmitter, the position of the servo lever
on the steering servo can be checked and, if necessary, the lever can be mounted in the correct position. Slight inclina-
tions due to the servo lever interlock can then be corrected using the trim.
Practical tips:
The trim for the steering function is exactly in the centre when the lever of the steering servo at the test does
not move by pressing the reverse switch (see Figure 2, Pos. 15). The steering wheel must be in the centre
position.
b) Setting the driving trim
When using a gas-powered model with throttle/brake servo, the trim setting is the same as for the steering servo.
However, to set the trim value, the two trim buttons for the drive trim are used (see Figure 10, Pos. 11).
When using an electric model with the speed controller, the trim must also be set to the average value. If the speed
controller does not have the ability to program the forward, stop and reverse positions, the centre position of the trim
must be set so that the drive motor is off when the drive control lever (see Figure 1. Pos. 3) is not engaged.
Figure 10
