Bedienungsanleitung Robbe Futaba FX-32 (Seite 90 von 96) (Englisch)

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Variousoutputdevicesareavailableforrobbeservos,someof

themshownintheillustrationabove.Thepicturealsoillustrates

theamountofadjustmentpersplinesegment.

14.7 LINKAGE INSTALLATION

Thefundamentalruleisthatallmechanicallinkagesshouldbe

installedinsuchawaythattheymoveasfreelyaspossible.If

youneglectthis,theservosdrawahighcurrent,whichreduces

safeoperatingtimesmarkedly.Atthesametimethecentring

accuracyofthewholelinkageisdiminished,andthisinturnhas

anadverseeffectonprecisionofcontrol.

1 Nut

2 Washer

3 Rubber grom-

met

4Metalspacer

5Aluminiumplate

6 Screw

1 Woodscrew

2 Washer

3 Rubber grom-

met

4Metalspacer

5 Wood

InRCmodelcarstheservosareinstalledinfactory-cutapertu-

resinthemountingplate.Modelboatscanbettedwithrobbe

quick-releaseservomounts.Pleaseinstallservoswithcare,as

theyaresusceptibletovibration.

14.6 SERVO TRAVELS / SERVO OUTPUT DEVICES

Splinedservooutputdevicescanbeusedtone-tunetheservo

neutralpositionbymechanicalmeans.

Adjustingtheneutralposition:

Removetheretainingscrewfromtheoutputlever,removethe

lever,moveittothecorrectneutralposition,thenreplaceitand

re-tighten the retaining screw.

Effect:

Toadjustthepositionbythesmallestpossibleamount(3.6°)in

theCLOCKWISEdirection:ARM2mustbesettothenextpos-

siblepositiononbaselineA,ARM3isthensetat7.2°,ARM4

at 10.8°. To obtain the smallest possible adjustment ANTI-

CLOCKWISE,ARM4mustbesettothenextpossibleposition

onbaselineA.

Splinedivisions:

Thesplinedservooutputshaftandsplinedoutputdevicefea-

ture25individualsplines(segments).Thepositionalchangeper

splineistherefore360°/25=14.4°.Theminimumadjustment

availableisdeterminedbythenumberofARMSoftheoutput

device:afour-armeddeviceoffersaminimumadjustmentof

360°/(25x4)=3.6°.Forasix-armeddevicetheminimum

adjustmentis2.4°.ARM2offsetstheneutralby2.4°clockwise,

ARM3by4.8°clockwise,ARM6by2.4°anti-clockwise,ARM

5by4.8°anti-clockwise,ARM4by7.2°clockwiseandanti-

Retaining

screw

Pushrod

15. THE SYSTEM IN OPERATION

All robbe-Futaba receivers continue to operate at a supply

voltageof3Vwhilstmaintainingfullrange.Thismeansthatthe

receivingsystemwillnormallycontinuetooperateevenifone

batterycellshouldfail(short-circuit),sincerobbe-Futabaser-

voscontinuetofunctionat3.6V-justalittleslowerandwith

lesspower.ThisisimportantinWinter,whentemporarydipsin

voltagecouldotherwisecauselossofcontrol.

The disadvantage of this feature is that, under certain circum-

stances, failure of the battery cell may not be noticed. You

shouldthereforecheckthereceiverbatteryfromtimetotime.

We recommend the use of the robbe battery monitor No. 8409

which displays the actual voltage of the receiver battery by

means of a row of LEDs.

15.1 POWER-ON SEQUENCE

Alwaysswitchonthetransmitterrst,followedbythereceiver.

Reverse the order when switching off. The servos run to their

neutralpositionsafterthereceiverhasbeenswitchedon.Itis

advisabletocheckeachfunctioninturnbyoperatingthetrans-

mittercontrols.Checkthecorrectdirectionofmovement/sense

ofthecontrolfunctionsatthesametime.Theservodirection

must be reversed if a servo rotates in the wrong direction.

15.2 ELECTRONIC IGNITION SYSTEMS

Ignitionsystemsforglowandpetrolenginesalsogenerateinter-

ferencewhichcanhaveanadverseeffectonanyradiocontrol

system.Electricalignitionsystemsmustalwaysbepoweredby

aseparatebattery.Usesuppressedsparkplugsandplugcaps

exclusively,aswellasshieldedignitionleads.Installtherecei-

vingsystemcomponentswellawayfromanyignitionsystem.

15.3 RECEIVER BATTERY CAPACITY / OPERATING TIME

This rule is valid for all power sources: capacity is greatly

reduced at low temperatures, resulting in considerably

shorter operating times.

Theoperatingtimevariesgreatlyaccordingtothenumberof

servos connected to the system, the stiffness of the mechani-

callinkagesandthefrequencyofcontrolmovements.Standard

servosdrawacurrentintherange150mAto600mAwhenthe

motorisrunning,andanidlecurrentofaround8mAwiththe

motorstopped.Super-servosandpowerfuldigitalservosdraw

peakcurrentsofupto1300mAatfullload.

Select a receiver battery with ample capacity, taking into

account the number of servos and the total current drain.

Tipsandnotes

Robbe Futaba FX-32 Seite 90

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