Swashplate Mixers - GRAUPNER MX-16S Programming Manual

Swashplate mixers

Collective pitch, roll and pitch-axis mixers
In the "Swashplate" line of the »Base settings« menu
you have already defi ned the number of servos which
are installed in your helicopter to provide collective pitch
control; see page 43. With this information the mx-16s
program automatically superimposes the functions for
roll, pitch-axis and collective pitch as required, i.e. you
do not need to defi ne any additional mixers yourself.
If you have a model helicopter which only has a sing-
le collective pitch servo, the "Swashplate mixer" menu
point is – of course – superfl uous, since the three
swashplate servos for collective pitch, pitch-axis and roll
are controlled independently of each other. In this case
the swashplate mixer menu does not appear in the mul-
ti-function list. With all other swashplate linkages emp-
loying 2 ... 4 collective pitch servos, the mixer ratios and
directions are set up by default, as can be seen in the
screen shot above. The pre-set value is +61% in each
case, but the value can be varied within the range
-100% to +100% using the right-hand rocker button, af-
ter pressing the SELECT button.
Pressing the CLEAR button resets the mixer input in the
highlighted fi eld to the default value of +61%.
If the swashplate control system (collective pitch, roll
and pitch-axis) does not follow the transmitter sticks in
the proper manner, then the fi rst step is to change the
mixer directions (+ or -), before you attempt to correct
the directions of servo rotation.
HEIM mechanics with two collective pitch servos:
• The collective pitch mixer acts on the two collective
pitch servos connected to receiver sockets 1 + 2;
• the roll mixer also acts on the two collective pitch ser-
vos, but the direction of rotation of one servo is re-
versed, and
• the pitch-axis mixer acts on the pitch-axis servo alo-
ne.
Note:
Ensure that the servos do not strike their mechanical
end-stops if you change the servo mixer values.
Swashplate mixers – Model helicopter 81