Bedienungsanleitung Multiplex PROFIcar4000 (Seite 13 von 16) (Englisch)

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PROFI mc 4000PROFI mc 4000

Version 2.0

You will find the switch for DIRECT THROTTLE un-

der the options for the COLLECTIVE PITCH control.

CONTR D :COL.PITCHÄ

;DIR.THROT

,S06'*

In the base types the switch S06 is assigned here as

standard. If you assign ON instead of a switch, then

throttle is always controlled via the transmitter control

IDLE-UP - except during AUTO-ROTATION.

'' TIP:

For electric-powered helicopters DIRECT THROTTLE

ON is the most suitable mode of operation.

If you use THROTTLE as the transmitter control and

servo, then the link with AUTO-ROTATION is not

automatically present, and must be programmed

separately.

This is how IDLE-UP works:

The IDLE-UP transmitter control limits the travel of

the throttle servo. The COLLECTIVE PITCH stick af-

fects the throttle curve only if the associated value is

below the limit set by idle-up. The following diagram

shows the connection.

When the idle-up slider is in the position shown, the

shaded area in the diagram is blocked for the throttle

servo.

Where the throttle curve runs into the shaded area,

throttle is limited to the value set by the IDLE-UP con-

trol. In our diagram that is about 60%.

In the middle range the throttle curve dips below the

limit. Here the throttle servo will react to movements

of the COLLECTIVE PITCH stick.

If IDLE-UP is pulled right back (e.g. for starting the

motor) the throttle servo no longer responds to the

COLLECTIVE PITCH stick.

In this example throttle is set to about 20%.

In this diagram you can also see that throttle can be

reduced down to 0% using the IDLE-UP control, i.e.

you could stop the motor in this way. In version 1.0 of

the software this was the only possibility. The ability

to define a value for idle is only possible in Version

2.0 and later.

This is how to adjust the idle speed:

Adjust the IDLE-UP transmitter control so that the mo-

tor idles smoothly and stably at the rear end-point.

We will assume that the throttle servo is at -70%

when this is the case.

The next diagram is intended to show how the size of

the carburettor opening varies in relation to the values

for the throttle servo, the IDLE-UP control and the

THROTTLE CURVE.

The THROTTLE CURVE is set to a range of values

between 0% and 100%.

IDLE-UP works between -100% and +100%.

The DYNAMIC THROTTLE servo also works over

the range -100% to +100%, which corresponds to the

full angular travel of the servo from one end-point to

the other.

The three „holes“ on the right-hand side of the dia-

gram show how the carburettor opening corresponds

to these settings.

For example, if you want to set the idle value to 15%

(with reference to the throttle curve), this corresponds

to a value of -70% at the servo.

The same applies if you want to limit the travel of

the transmitter control for idle-up.

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