GRAUPNER mz-24 Pro Programming Manual page 85

AUTO TRIM
The AUTO TRIM function allows users to quickly and
easily to trim a model, for example during the first
flight or after large upgrades, repairs, etc.
During a model's first flight, the previous ground per-
formed settings may not be applicable to the new
flight requirements. Correcting the attitude requires
users to simultaneously move the control sticks and
trim controls until the model flies straight.
Once the required flight attitude is reached by moving
the control functions 2 - 4, the AUTO TRIM function
can be activated by moving the assigned switch one
time. This is typically a self-centering switch, such
as the 3-position switch S8, which will return to the
center position after the switch is flipped to the ON
position. (For safety reasons it is highly recommended
a self-centering switch is used, rather than a switch
with a permanent ON position).
About one second after the AUTO TRIM switch is
pushed, the deviation percentage from center posi-
tion of control stick positions 2 - 4 are stored as trim
value (within maximum ±30 %):
BACK PHASE 1 Trim Step
SE T1 T2 T3 T4
STEP 04 02 04 04
POS 000% 000% 000% 000%
SET 000% 000% 000% 000%
D.TRIM 1 NONE AUTO TRIM INH
D.TRIM 2 NONE CTL SW 8
At the same time the control sticks can be released to
the normal position, as shown below:
BACK
STEP
POS
SET
D.TRIM 1
D.TRIM 2
Notices
• For safety reasons never use the AUTO TRIM
option if the trim step is set to "0".
• Control sticks 2 - 4 must be in central position
while the switch is assigned. Otherwise the
deviation percentage from the central position
will already be stored as trim values in the trim
memory.
• All AUTO TRIM switch activations are cumu-
lative. For safety reasons it is highly recom-
mended to use the switch only once and to
deactivate it after the "AUTO TRIM flight" has
SERVO
finished. Otherwise there is the risk that the
VIEW
AUTO TRIM function might be inadvertently
INC
activated.
RES
• Never assign the AUTO TRIM function to a
DEC
"normal" position holding switch where the
SET
switch will need to be switched to the OFF po-
sition after each AUTO TRIM process. Oth-
erwise, all other switch activations will
inhibit the AUTO TRIM process.
• Refer to the POS Line and SET Line settings
section (page 83) for additional information on
setting and storing these values.
PHASE 1 Trim Step SERVO
SE T1 T2 T3 T4 VIEW
INC
04 02 04 04
000% –12% +09% –29% RES
000% 000% 000% 000% DEC
NONE AUTO TRIM OFF SET
NONE
CTL SW 8
Base menu - Trim setting 85