32
Digital trims
Description of function, and Ch1 cut-off trim
Digital trims with visual and audible indicators
Both the dual-axis stick units are fi tted with digital trim
systems. When you give the trim lever a brief push
(one “click”), the neutral position of the stick chan-
nel changes by one increment, the size of which you
can select. If you hold the trim lever in one direction,
the trim value changes continuously in the correspon-
ding direction with increasing speed. In the »Base se-
tup model« menu (page 50) you can set the incre-
ment per click to any value in the range “1” to “10”.
The screen shows the current trim position and its nu-
merical value.
The degree of trim offset is also “audible”, as the pitch
of the tone changes to refl ect the setting. With a mo-
del in fl ight you can fi nd the trim centre position easi-
ly without having to look at the screen: If you over-run
the centre position, the trim stays in the centre positi-
on for a moment.
The current trim values are automatically stored when
you switch from one model memory to another. The
digital trims are also stored separately for each fl ight
phase within a model memory, with the exception of
the “Ch1” function (Channel 1), which is the throttle /
airbrake trim on a fi xed-wing model.
The Ch1 trim includes another special function which
makes it easy to re-locate the idle throttle setting of
a glowplug motor – provided that you have previous-
ly entered “forward” or “back” in the motor line of the
»Model type« menu; see page 52.
1. Fixed-wing models
The Ch1 trim features a special cut-off trim which
is designed for glowplug motors:
You initially use the trim lever in the usual way to
select a reliable idle setting for the motor. If you
now move the Ch1 trim lever towards “motor cut-
off” as far as its end-point (i.e. you hold the trim le-
ver at its end-point continuously until the audible
signal ceases), pushing the lever in a single move-
ment, a marker appears on the screen in the last
position. You can now return to the idle setting for
starting the motor simply by pushing the idle lever
once in the direction of “more throttle”.
Notes:
The cut-off trim is disabled if you enter “none” in
the Motor line of the »Model type« menu (see
page 52).
Since this trim function is only effective in the di-
rection of “motor off”, the illustration above will
look different if you reverse the control direction for
the throttle minimum position of the Ch1 stick from
“back” (as set in the picture above) to “forward” in
the “Motor” line of the »Model type« menu.
Of course, you can set the left-hand stick as the
Ch1 stick if you prefer; see the »Base setup mo-
del« menu.
2. Model helicopters
In helicopter mode the Ch1 trim has another fea-
ture in addition to “cut-off trim” as described under
“Fixed-wing models”; this time in conjunction with
the “Throttle limit function”:
While the throttle limit slider is in the bottom half of
its travel, i.e. in the “start-up range”, the Ch1 trim
lever acts as idle trim on the throttle limit.
For more information please read the section en-
titled “Throttle limit” on page 62.
Note:
The Ch1 trim only affects the throttle servo – not
the collective pitch servos – and it works equally
over the full stick travel. Please note that the thrott-
le servo for a helicopter must be connected to re-
ceiver output 6 (see “Receiver assignments” on
page 37).
Digital trims
To Next Page
Loading...