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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
(see page 104), this motor "cut off" option can be
coupled to a switch for throttling down a speed con-
troller or to move a servo on the carburettor of a mo-
tor 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 Emer-
gency-OFF function at the same time, which was not
possible with the"Cut-off trim" function.
This motor OFF position (Thr. CutOff) is specified in
the left column field 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 field, directly over the
column label STO, then selecting the appropriate
ON/OFF switch function in the right column.
• If the percentage value specified for the middle
column is greater than the current servo posi-
tion, 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 specified 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 carburettor's throttle servo only
to the extent dictated by the value in the left col-
umn as soon as the servo's position once under-
runs 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
stick 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.
BASIC SETTING,MODEL
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" posi-
tion, tap on the centre 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 throt-
tle servo does not perform mechanical runout, e. g.
-125 %.
BASIC SETTING,MODEL
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 control-
ler into the desired position with the throttle/brake
stick then touch the centre SET key of the right touch
pad.
BASIC SETTING,MODEL
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 (emergen-
cy) or which will be activated by the threshold.
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