Bedienungsanleitung Multiplex ROYALevo12 (Seite 46 von 57) (Englisch)

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Instructions

Page 101

Direction of

flight

Head 4

90°

Head ri

Head le

Head f/b

Example 2: 4-point 90° swashplate

Geometry -90°

Rotation +0°

Lever

15.5.1. Parameter „Geometry“

I affects active model memory

Range 90 ... 150° / -91 ... -150°

Default +120°

The parameter Geometry defines the angle between

the swashplate servo Head f/b and the servos arranged

symmetrically to it, i.e. Head le and Head ri.

Attention: The angle must be entered with a negative

prefix if the servo Head f/b is at the front (in flight direc-

tion) (Ex. 2).

15.5.2. Parameter „Rotation“

I Affects active model memory

Range -100 ... +100°

negative à clockwise,

positive à anti-clockwise

Default 0°

The parameter Rotation (also termed virtual swashplate

rotation) is required,

• if the swashplate in the model is installed physically

in such a way that the servo Head f/b is not located

on the model’s centreline

• if the model rolls when a pitch-axis command is

given.

90°

140°

Flight direction

Rotation 20°

Geometry

Rotation 20°

Flight direction

15.5.3. Parameter „Lever +/-“

I affects active model memory

Range -100 ... +100%

Default 0%

The parameter “Lever +/-“ is only needed if your model

has a 3-point swashplate whose design dictates that the

actuation points are not equi-distant from the rotor

shaft axis.

The radial spacing ratio (centre rotor shaft -> actuation

point) of the servo Head f/b is adjusted relative to the

two lateral servos Head le and Head ri in the form of a

percentage, where the lateral lever lengths are 100%.

Example:

Spacing Head f/b: 40mm

Spacing Head re (li): 50mm (=100%)

The lever for Head f/b is 20% shorter than the lateral

levers..

⇒ Correct setting: Lever +/- -20%.

' TIP:

Once you have entered the mechanical values for the

swashplate of your model into the Rotor head mixer in

the form of parameters, the next step is to calibrate the

rotor head servos carefully in the menu K Servo / Cali-

bration (è 16.1) You cannot expect the control system

to work accurately unless you calibrate the servos ex-

actly. You can check the direction of rotation of the

servos by applying collective pitch control commands. If

any servo does not run in the correct “sense” (direction),

simply reverse its direction of rotation. At the servo

calibration stage you may find it helpful to disconnect

the pushrods from the swashplate to the rotor head, as

this makes it easier to calibrate the maximum travels

(P1, P5). The control travels can be adjusted once you

have completes this stage; this is carried out in the me-

nu H Control (è 14.2.4. Aileron / Trvl., Elevator / Trvl.,

è 14.2.9. Collect. (Collective Pitch Curve).

15.5.4. Helicopters HEIM mechanics

To program a helicopter with HEIM arrangement pro-

ceed as follows:

1. Use the template "HELIccpm"

2. Assign HEAD f/b as servo 9. This servo is not used

in the model. It serves to activate the head mixing.

3. Assign Elevator (pitch axis) to the original HEAD f/b

servo.

4. In the mixer Rotor head set the parameter geome-

try to 90°. The servos HEAD le and HEAD ri will now

be controlled by Collective pitch and Aileron (Roll)

only.

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