81
Detail program description - Base setup models | Winged models
Motor cutoff (Thr. CutOff)
Note:
This menu line is suppressed if "None" or "None/inv"
is selected for the "Motor on C1" line.
Depending on the "idle forward or back" choice
made in the "Motor on C1" line of the »
Model type
«
menu, this motor "cut off" option can be coupled to
a switch for throttling down a speed controller or to
move a servo on the carburetor of a motor to the OFF
position. This option not only replaces the"Cut-off
trim" function known from other
Graupner
mc
and
mx
transmitters but also serves as an Emergency-
OFF function at the same time, which was not
possible with the"Cut-off trim" function.
This motor OFF position (Thr. CutOff) is specifi ed in
the left column fi eld over the column label
SEL
and
its value is to be established through trial and error.
A speed controller or throttle servo will only take on
this preset position when a certain servo position
or threshold is underrun and a switch is activated.
This is done by setting the desired servo position
(threshold value) into the middle column fi eld, directly
over the column label
STO
, then selecting the
appropriate
ON/OFF switch function in the right column.
If the percentage value specifi ed for the middle
•
column is
greater
than the current servo position,
i.e. the current servo position lies
below
the
threshold, the switchover will occur as soon as the
switch is put into its ON position.
If the percentage value specifi ed for the middle
•
column is
less
than the current servo position, i.e.
the current servo position is
above
the threshold,
the speed controller will initially reduce motor
speed or close the carburetor's throttle servo
only to the extent dictated by the value in the
left column as soon as the servo's position once
underruns
the threshold (max. +150 %) after the
switch is changed over to its ON position.
The speed controller or throttle servo will remain in
this cut-off position only until the selected switch is
again changed over followed by a one-time throttle
servo or speed controller movement beyond the
preset threshold with the throttle/brake joystick
control.
The factory setting for the left column is -100 % for
the throttle servo "cut-off" position and a threshold of
+150 % servo position setting in the middle column.
B A S I C S E T T I N G , M O D E L
SEL
SET
STO
SET
RF transmit
on
RF range test
99s
DSC Output
PPM10
–––
Thr. CutOff
+150%
–100%
Programming procedure
To change the throttle servo's preset "cut-off"
position, tap on the center
SET
key of the right touch
pad. The current setting will be displayed in inverse
video. Now use the selection keys of the left or right
touch pad to set a value at which the motor is reliably
"off". If a combustion motor is involved, be sure the
throttle servo does not perform mechanical runout,
e.g. -125 %.
B A S I C S E T T I N G , M O D E L
SEL
SET
STO
SET
RF transmit
on
RF range test
99s
DSC Output
PPM10
–––
Thr. CutOff
+150%
–125%
The – upper – preset value in the middle column
ensures the motor can be stopped, throughout the
maximum possible positioning range of the servo or
speed controller, alone by the switch to be assigned
in the right column.
However, if you wish to set a lower threshold, by
which an underrun will cause the throttle servo or
speed controller with closed switch to switch into
the cut-off position, reduce the preset servo travel
from +150 % by placing the throttle servo or speed
controller into the desired position with the throttle/
brake joystick then touch the center
SET
key of the
right touch pad.
B A S I C S E T T I N G , M O D E L
SEL
SET
STO
SET
RF transmit
on
RF range test
99s
DSC Output
PPM10
–––
Thr. CutOff
+150%
–125%
Finally, use the column at the right to specify a
switch with which you can cut off the motor directly
(emergency) or which will be activated by the threshold.
B A S I C S E T T I N G , M O D E L
SEL
SET
STO
SET
RF transmit
on
RF range test
99s
DSC Output
PPM10
Thr. CutOff
+100%
–125%
8
Notes:
Be sure the throttle servo does not run out
•
mechanically when the cut-off function is
activated.
A threshold over +100 % is reached by temporarily
•
increasing the travel for servo 1 in the »
Servo
adjustment
« menu to over 100 % then, after
storing the threshold, change servo travel back to
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