GRAUPNER mx-20 Hott, Programming Manual

Page: 106 / 296

106 Detail program description - Control adjust
marker is located at the end-point (see the partial
display screenshot shown below), then you can simply
click once to restore the original idle confi guration (see
also page 54).
This switch-off trim functions as an idle trim
only in the
left half of the throttle limit rotary control's path. That
is: only within this range is the marker line set and also
stored.
GRAUBELE
#01
3:33h
stop
flt
K78
0:00
0:00
RX0.0V
5.2V
Last idle position
2.4
M
motor OFF position
CTRL 6
Throttle limit control
Current trim position
Trim at
For this reason, the marker is hidden and may even be
erased while the throttle limit rotary control points to the
right of its center position:
GRAUBELE
#01
3:33h
Stop
Flt
K78
0:00
0:00
RX0.0V
5.2V
M
2.4
CTRL 6
Throttle limit control
Notes:
Since this trim function only takes effect in the •
"Motor OFF" direction, the screen image shown
above changes appropriately if you alter the control
direction for the pitch minimum position of the C1
stick from "back" (as shown in the above image) to
"forward" in the "min. pitch" line on the menu " Base
setup model " . The effects as shown also swap to
the other side if you swap pitch right (as shown in the
above screen images) to pitch left in the "Stick mode"
line on the "
Base setup model " menu (see page 74).
You can use the • "Servo display" menu to observe
the infl uence of the throttle limit slider. This menu
can be accessed from almost any other menu by
simultaneously pressing the

keys on the left
touch pad. Bear in mind that servo output 6 controls
the throttle servo on the mx-20 HoTT!
A servo connected to output 12 can be used
•
independently of this for other purposes by means of
mixers, provided that you separate the servo from the
transmitter control at function input 12 on the "
MIX-
only channel " menu; see page 193.
The throttle restriction set by the throttle limiter •
is shown as a horizontal bar in the throttle curve
diagram on the second display page of the "Channel
1

Throttle" option on the " Helicopter mixers "
menu (see page 168). The output signal for the
throttle servo cannot be higher than the level set by
the horizontal bar:
Input
Output
Point
2
0%
0%
0%
C1
Nor mal
Thr
Cur ve off
Throttle limiter
position
The above diagram shows precisely this scenario: in
the above example, the throttle limit control is set to
-60% and thus restricts the movement of the throttle
servo to -60% of full travel.
Time delay for the throttle limiter
To safely avoid the carburetor opening too rapidly, you
should assign throttle limiter input 12 a time delay that
takes effect only in the direction of full throttle. This
applies especially if you are controlling the throttle limiter
using a switch and not the default CTRL 6 proportional
rotary control.
To set a delay time, proceed as follows: turn the throttle
limit control as far to the right as it will go or move the
relevant switch to the full-throttle position; then use the
arrow keys on the left or right touch pad to select the
"–time+" column:
– time +
0.0
0.0
0.0
0.0 0.0
0.0
0.0
0.0
Nor mal
Input 9
Input 10
Input
Th.L.12
11
After briefl y tapping the center SET key on the right
touch pad, you can then use the arrow keys on the left
or right touch pad to select your desired time delay, e. g.
5 seconds: