GRAUPNER 32032, Руководство по программированию, Страница: 250 / 324

250 Detail program description - Ring limiter
Ring Limiter
Control of Voith Schneider propellers in model ships
Scroll with the selection keys on the left or right touch
pad to the menu option »
Ring limiter « in the multi-
function menu:
MIX active/phase MIX-only channel
Dual mixer Fail-safe adjust
Teacher / pupil Tx. output swap
Profi trim Trim memor y
Telemetr y Channel sequence
Multichannel Ring limiter
MIX-only channel Dual mixer
Swashplate mixer Fail-safe adjust
Teacher / pupil Tx. output swap
Profi trim Trim memor y
Telemetr y Channel sequence
Multichannel Ring limiter
Tap briefl y on the center SET key of the right touch
pad to open this menu option:
R I N G L I M I T
4
4
9
11
SET
4
Input
3
3
3
3
X Y
4
10
12
X
Output
Y
OFF
OFF
OFF
Œ
This » Ring limiter « is primarily intended for the
control of up to three so-called Voith Schneider
propellers in ship models. These are positioned
beneath the ship where they are exposed to a free
fl ow of water in all directions. The control of these
drives and turning their vertically oriented propeller
blades is done with two servos per Voith Schneider
propulsion unit whereby, for mechanical reasons,
the propellers of this type offered by
Graupner under
order nos. 2358 and 2358.BL have a maximum
control travel limitation of 4 mm each.
As long as the joysticks for forward/reverse and left/
right are operated individually (see section "Column
Input") this is no problem because travel for the
two servos can be appropriately adjusted, both
mechanically as well as in the »
Servo adjustment «
menu. However, this becomes problematic when, for
example, one joystick is 100 % forward and,
at the
same time , the other joystick is pushed completely
to the right to arithmetically produce a 141 % sum for
the two servo travel vectors. The mechanical controls
of the Voith Schneider propellers will collide with their
limits; in best case only drawing an unnecessary
amount of electric current, in worst case causing
damage or even bursting the linkage..
In order to avoid this problem, the
mc-20
HoTT
transmitter has a maximum of three "ring limiters"
available in the "
SET " column of this option's fi rst
display page (see fi gure at left) that can be switched
"ON" or "OFF" individually. In the fi rst line on the
setting page for a given "ring limiter", its maximum
travel can then be set for a range of between 25 and
125 %. The second line provides a setting for the size
of limitation of overall defl ection between:
0 % circular limit ( )
100 % no limit ( )
(limitation is strictly a matter of the given
joystick's mechanical stop)
Important notice:
When this function is used, leave the respective
setting values in the »Dual Rate / Expo« and
»Servo adjustment» menus at 0 and 100 % or
reset them back to their default values.
The adjacent sketch illustrates the
effect for a 0 % setting. The cross-
hatched area of travel is curtailed
and appears as a "dead zone".
Column, "Input"
With the standard preset control mode 1, all three
ring limiters are pre-assigned to inputs 3 (forward/
reverse) and 4 (left/right) which are actuated by the
left joystick. However, this pre-assignment can be
replaced anytime by any other transmitter control
combination. Use the selection keys on the left or
right touch pad to move the marker frame to the
desired value fi eld then briefl y tap the center
SET key
of the right touch pad:
R I N G L I M I T
4
9
11
SET
4
Input
3 3
3
3
X Y
4
10
12
X
Output
Y
OFF
OFF
OFF
Œ
4
Select the desired control channel (1 … 12) for the
value fi eld now displayed in inverse video by using
the
cd
or
ef
selection keys. However, do not
forget that if a control channel in the range of 5 … 12
is selected, it must also be assigned to a control in
the »
Control adjust « menu, see page 108. Briefl y
tap the center ESC of the left touch pad or the center
SET key of the right touch pad to conclude your entry.
In principle, the other inputs are to be handled in the
same manner.
A tap on the
cd
or
ef
keys of the right touch pad
at the same time ( CLEAR) will reset the active value
fi eld back to its given default value.