Servo Adjustment - GRAUPNER mx-20 Hott Programming Manual

Servo adjustment

Servo direction, midpoint, travel and limit
This menu is used to set the direction, neutralization,
travel and limit parameters for a given selected servo
exclusively.
Suppress models
Base setup model
Model type
Ser vo adjustment
Stick mode
Control adjust
Briefl y press the center SET button in the right touch
pad.
S1 0% 100% 100%
S2 0% 100% 100%
S3 0% 100% 100%
S4 0% 100% 100%
100% 100%
S5 0%
Rev cent
Begin setting servo parameters in the left column.
Basic procedure steps:
1. Select the desired servo, S1 ... S12, with the
arrow keys of the left or right touch pad.
 arrow keys of the left or
2. If necessary, use the
right touch pad to reach the desired column then,
if desired, move the respective control out of its
midpoint to make an asymmetric setting.
3. Briefl y press the center SET button in the right touch
pad. The respective entry fi eld will be displayed in
inverse video.
4. Use the arrow keys of the right touch pad to set the
desired value.
5. Briefl y press the center SET button in the right touch
90 Detail program description - Servo adjustment
pad to complete the entry.
6. Simultaneously
the right touch pad (CLEAR) will set any setting
which has been made back to the given default
value.
Important:
Servo designation numerals are based on the respective
receiver outputs to which they are connected, provided
that no swapping of transmitter and/or receiver outputs
has been specifi ed. This means that even a change of
stick mode will not effect the numbering of servos.
Column 2 "rev"
The direction in which a servo turns is adapted to the
practical reality of the given model so that the assembly
of control rods and joints do not need to accommodate
a specifi c servo rotation direction. Rotation direction is
symbolized by the "=>" and "<=" character combinations.
+
tr v
Servo rotation direction must be specifi ed before making
settings for the options which follow below.
Simultaneously pressing the  or  keys of the
right touch pad (CLEAR) will reset the rotation direction

to "=>".
normal
reversed
pressing the  or  keys of
normal
reversed
Column 3 "midpoint"
The servo midpoint setting is intended for adapting a
non-standard servo (a servo whose midpoint position
does not correspond to a pulse length of 1.5 ms, i.e.
1500 µs), as well as for minor adjustments, e. g. for the
fi ne tuning of the neutral position of model rudders.
Independent of trim levers and any mixer settings, the
neutral point can be set in a range of -125 % to +125 %
within a maximum servo travel scope of ±150 %.
Independent of all other trim and mixer settings, this
setting is always based directly on the respective servo.
Note that extreme adjustments of the neutral point can
lead to one-sided restrictions of servo motion because
both the electronic and the mechanical aspects limit
total travel to ±150 %.
Simultaneously pressing the  or  keys in
the right touch pad (CLEAR) will reset the entry fi eld
displayed in inverse video back to its "0 %" value.
Column 4 "- Weg +"
This column is used to set servo travel symmetrically or
asymmetrically for each side. The setting range is 0 ...
150 % of normal servo travel. The values set are based
on the settings that have been made for the "midpoint"
column.
To create a symmetric
travel path, i. e. control-
side independent travel,
the respective control
(joystick, proportional
rotary control or switch) is
to be put into the position
which covers travel to
both sides of the marked