Sub Trim - RadioLink AT9S Pro Instruction Manual

• Retract servos are not proportional. Changing END POINT will not adjust the servo.
END POINT adjusts only the individual servo. It will have no effect on any other servo that is operated in
conjunction with this servo via mix or preset programming such as FLAPERON, AILEVATOR, etc. This is so that
each individual servo can be carefully fine-turn to avoid binding and other conflicts. To adjust the total travel of a
function such as FLAPERON, make the adjustments in that function's controls. For CCPM helicopters, adjust
the total travel of the function, such as collective pitch, in SWASH AFR. Adjust the linkage or the END POINT? It
is nearly always best to adjust your linkages to get as close as possible prior to utilizing END POINT. The higher
the END POINT setting, the better position accuracy and the more servo power available at nearly any position
(except if using digital servos). Higher END POINT values also mean longer travel time to reach the desired
position, as you are utilizing more of the servo's total travel. (For example, using 50% END POINT would give
you only half the steps of servo travel, meaning every click of trim has twice the effect and the servo gets there
in half the time). End point (and moving the linkage) = torque, accuracy, but transit time to get there.
• END POINT (instead of adjusting linkages) = travel time, but torque, accuracy.
Engine idle management: IDLE-DOWN and THR-CUT: functions which work with the digital THROTTLE TRIM
to provide a simple, consistent means of engine operation. No more fussing with getting trim in just the right
spot for landings or take offs! For additional engine adjustments, see THROTTLE-NEEDLE and THROTTLE
DELAY.
Goals
Decrease the flap servo
throw in the upward
direction to 5% to allow
trimming of level flight
only and down travel to
85% to prevent binding.

2.5 SUB TRIM

SUB-TRIM: makes small changes or corrections to the neutral position
of each servo. Range is -120 to +120, with 0 setting, the default, being
no SUB-TRIM.
We recommend that you center the digital trims before making
SUB-TRIM changes, and that you try to keep all of the SUB-TRIM
values as small as possible. Otherwise, when the SUB-TRIM is of
large values, the servo's range of travel is restricted on one side.
The recommended procedure is as follows:
• Measure and record the desired surface position;
• Zero out both the trims (TRIM RESET menu) and the SUB-TRIM (this menu);
• Mount servo arms and linkages so that the control surface's neutral is as correct as possible; and
• use a small amount of SUB-TRIM to make fine corrections.
Goals
Steps
Open END POINT function
Choose proper channel and
move stick or Knob in direction
you want to adjust and set servo
throw (Ex: flap up 5%)
Close
Steps
Inputs
for 1s.(If ADVANCE,
to END POINT,PUSH
to FLAP， PUSH，
【SUB-TRIM】
CH1：AILE
Inputs
23
again）
to 5%， press
1：AILE
2：ELEV
3：THRO
0
4：RUDD
CH9 : 0
5：GEAR
CH10 : 0
6：FLAP
CH11: 0
7：AUX1
CH12: 0
8：AUX2
0
0
0
0
0
0
0
0