Bedienungsanleitung Multiplex PROFIcar4000 (Seite 15 von 16) (Englisch)

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PROFI mc 4000PROFI mc 4000

Version 2.0

10. Gyro suppression

Why suppress the gyro?

We have already discussed this when we dealt with

the V-characteristic for analogue switches:

The gyro counteracts unwanted movements of a

helicopter around the vertical axis, but it also

tends to damp out intentional commands when

the pilot operates the yaw (tail rotor) stick.

For this reason it is necessary to reduce the ef-

fect of the gyro when you apply a tail rotor com-

mand.

This is how it used to work:

In the base types there was only the GYRO servo.

There it was possible to control gyro sensitivity. How-

ever, it was not possible to include the effect of the

yaw control if you had programmed the helicopter us-

ing the UNIVERSAL base type.

This is how it works now:

You can set the level of gyro suppression required by

setting up the system as follows: control the GYRO

servo using an analogue switch which has the V-

characteristic and is operated by the YAW (tail rotor)

control. This is the procedure:

1. Define an analogue switch

Starting from the operating screen move to the

„Assign switches“ menu by pressing b q g.

Open the select field by pressing x and select

the analogue switch A1. If your tail rotor control

is not on Control A (left-hand stick) select A3. If

you choose analogue switch A1 the menu should

now look like this:

Assigning switches

ANALOGUE SW.: A1 Ä

;FROM CONTROL: A

,EFFECT : MAX +100%_

As long as the select field is still open you can

press the y button to change the characteristic

for the analogue switch to „V“. The designation

then changes to V1.

2. Changing GYRO with the analogue switch

Return to Menu 2 by pressing k, then move on

to Menu 1 by pressing the n button. Press b b

to move to the menu for setting the number of

points and to assign the switches. Press the b

button to open the select field for the servos and

select GYRO. That is servo 7 in the base types.

Now you can open the switch select field by

pressing w, and select the analogue switch V1.

The analogue switch must now be reversed with

the y button to ensure that gyro effect is dimin-

ished when you move the tail rotor stick away

from centre. The menu now looks like this:

No.of points+switch

;SERVO 7:GYRO

INPUT :GYRO

, 3-PNT V1-A# _

V1-A means that the analogue switch A1 has

been assigned the V-characteristic and is oper-

ated by control A. The down-arrow indicates that

the analogue switch has been reversed.

3. Setting the fixed value for

the GYRO transmitter control

In the base types control H is assigned to GYRO.

No physical control exists for it. We now have to

apply a fixed value to this control in order to give

the servo a value too. This value then represents

the control signal for maximum gyro sensitivity.

Starting from the menu shown above for switch

assignment, return to Menu 1 by pressing k k,

and then move to the Adjust Controls menu with

the x button.

Press the x button to open the select field and

search for the GYRO control. Press b to move

on to select the options, then search for FIXED

VALUE. If you now open the adjust field by

pressing w, you can set the appropriate value

using the q/n buttons or the Digi-adjustor. The

menu should then look something like this:

2: Hover 1450

CONTR H :GYRO Ä

;FIXED VAL.

,ON +100%_

'' TIP:

Note that a flight mode is displayed in the top line of

the menu; this indicates that the setting applies only

to this one flight mode. If you wish to use gyro sup-

pression in more than one flight mode, you must as-

sign the fixed value in all the modes separately.

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