GRAUPNER mx-16 ifs, Руководство по программированию

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107 Programming example: fi xed-wing model
Programming example: servos running in parallel
In some cases a second servo is required to run in
parallel with an existing servo; for example, if a second
elevator or rudder is to be actuated by a separate servo,
or where a second servo is needed to cope with very
high control forces, or where two servos are required for
a large control surface due to the high forces involved.
This task could be solved simply by connecting both ser-
vos together in the model using a conventional Y-lead.
However, this has the drawback that the linked servos
cannot be adjusted individually from the transmitter, i. e..
you forfeit the basic advantage of the computer radio
control system: separate adjustment of individual servos
from the transmitter.
Another option would be to use a “magic box” module
(Order No.
3162 – available in the Graupner range) in-
stead of a simple Y-lead. This unit allows one transmitter
channel to control up to four servos, which can then be
adjusted in direction of rotation, centre and travel; see
the Appendix for further details.
However, the simplest method is to use the transmitter’s
software facilities. For example, it is easy to set up …
Two elevator servos
… to operate in parallel. First move to the …
»base sett.« (pages 46 … 49)
SEL
2 elev sv
1
GRAUBELE model name
stick mode
tail type
motor on C1 no
… menu and set “2 elev sv” in the “Tail” line.
The two elevator servos are then connected to receiver
output sockets 3 and 8.
Two rudder servos
In this example we will connect two rudders “in parallel”
using the »
free mixer « menu. The second rudder could
be connected to receiver output 8, which is not already
in use.
The fi rst step is to move to the …
»free mixer« (pages 89 … 93)
SEL SEL
typ fro to
M1
M2
M3
rd
??
8
??
??
??
tr
… menu and set up a mixer “tr rd
¼
8”. In the “Type”
column select the “tr” setting, so that the rudder trim
affects both rudder servos.
Finally switch to the graphics page and set a
SYM metri-
cal mixer input of +100%:
MIX 1 tr rd 8
trv
0% offs
ASY SYM
+100%+100%
+
Once again, for safety reasons it is really essential that
you set or leave input 8 to “empty” in the »
contr set. «
menu.
As an added refi nement, you may want both rudders
to defl ect outwards only, as part of a braking system
controlled by the Ch 1 stick. This can be accomplished
by setting up two additional mixers “c1
¼
4” and “c1
¼
second rudder channel”, with suitable servo travel
settings. An offset of +100% is then selected for both
mixers, as the Ch 1 stick is (usually) at its top end-point
when the airbrakes are retracted, and the winglet rud-
ders are only required to defl ect outward proportionally
when the brakes are extended.