GRAUPNER mc-16 Programming Manual page 81

DUAL-RATE
Switchable Servo Travel
(access via Set-Up Menu)
The Dual-Rate function lets you switch to a different
amount of travel while the model is in flight, using an
external switch. The travel for each of the two switch
positions can be set to any value within the range 0 to
125% of normal servo travel. The "D/R" switches must first
be connected to main circuit board in the transmitter (see
page 10). After selecting the "D/R" code the first step is to
select the channel (channel 2 to 4) using
Transmitter Ch. Function External Switch
2 Roll socket 0
3 Fore & Aft Pitch socket 1
4 Tail Rotor socket 2
Move the switch to the appropriate position, then set
the required servo travel using
INC
Switch position in the display:
ch = closed (ON)
CH = open (OFF)
Additionally without switches fitted this option can be used
for travel adjustment.
EXPONENTIAL
Progressive Servo Travel
(access via Set-Up Menu)
Exponential travel reduces the servo travel around
the neutral position of the stick. Travel progressively
increases towards the stick end-points, so that full
servo travel is still available at the extremes. The
degree of progression can be set from linear "LN" (or
0%) to 100%. The Exponential function therefore has
no effect when set to "LN". Dual-Rates and the
CH SEL :
Exponential function are controlled by the same
switch, see EXPO-/DUAL-RATE
Transmitter Ch.
2
3
4
and .
DEC
Switch position in the display:
ch = closed (ON)
CH = open (OFF)
Additionally without switches this option can be used
for adjusting the control stick characteristics.
:
Function External Switch
Roll socket 0
Fore & Aft Pitch socket 1
Tail Rotor socket 2
EXPO-/
+
DUAL-RATE
Coupled Dual-Rate & Exponential
(access via Set-Up Menu)
The Dual-Rate function provides a means of adjusting
servo travel symmetrically around the neutral position to
any point between 0 and 125%, and switching between the
2 settings by means of an external switch. The Exponential
function alters the servo response curve. As the external
switches affecting control functions 2...4 control the Dual-
Rate and Exponential functions simultaneously, it is
possible for you to set-up the controls of your model very
precisely, to suit your exact requirement. You can program
two independent values, separately for roll, fore & Aft pitch
and tail rotor, such as a 20% servo travel for one external
switch position and 125% for the other position, with an
exponential curve of, say, linear or 80%. Note that this
Exponential setting defines the "degree of progression"
(the shape of the curve), not the extent of the servo travel.
Note: For safety reasons the lowest the Dual-
Rate value should be set to is 20% travel.
Characteristic Curves for various settings.
Dual-Rate = Linear reduction or increase of
servo travel (0% to 125%)
Exponential = Progressive control characteristic
with 100% servo travel
Expo-/Dual-Rate = Combined Exponential and Dual-
Rate function
Helicopter 81