Spektrum SPMAR7200BX Operating instructions

Spektrum AR7200BX Governor

Firmware Update

IMPORTANT: When using the AR7200BX with larger helicopters (500-size and larger): It is necessary that you connect a DSMX

remote receiver

(not included) to the AR7200BX before binding . See “Receiver Installation” for more information.

IMPORTANT: You must download and install the latest AR7200BX receiver ﬁrmware at http://ar7200bx.beastx.com/ BEFORE installing the governor update.

Required

• Spektrum™AR7200BXFlybarlessController

• SpektrumAR7200BXUSBUpdater(SPMA3030orBTXA76007)

• GovernorSensor

 –AircraftRPMSensor(SPM9560)or

 –RPMSensor(opticalsensor)(SPM1452)

Navigating the Governor Setup Menus

• EntertheGovernorSetupMenubypressingtheSetupButtononthe

AR7200BX before power-up and holding it for approximately 2 seconds

until the LED at menu point (A) illuminates.

• Thereare9menupoints(MenuLED,A, B, C, D, E, F, G, H, I).

• MenupointsareshownbythemenuLEDslocatedtotherightofthe

alphabetical letters on the case.

• MenustatusisshownontheLEDlocatednextto“Status”closetothe

center of the case.

• QuicklypresstheSetupButtontomovefromonemenupointtothenext.

• PressandholdtheSetupButtontochangeorsaveavalue.

Preparing Your Transmitter

1.Programthethrottlechanneltravelto100%forbothhighand

low endpoints.

2. Select a linear throttle curve. You will program your normal throttle

curves later.

RPM Sensor Installation

MounttheRPMsensorandbrackettothebackplatescrewsofyourengineasshown.

• Threadlockmustbeusedonthescrews.

• TheRPMsensorbracketisadjustablebyextendingorretractingtherpm

sensor and fastening the screw in place.

• ConnecttheRPMsensortoAux3.

Throttle Arm Setup

1.Disconnectthethrottlelinkagefromthethrottlearm.

2.Makesurethethrottlecurveinyourtransmitterislinear.

3. Movethethrottlestickto50%andmakesurethethrottlebarrelisopen50%.

4.Adjustthethrottlearmandtheservoarmsotheyareparalleltoeachother.

5. Select holes in the servo horn and the throttle arm to achieve the full range

ofthrottlemotion.Thetransmitterservotravelmuststayabove100%.

6.Programyournormalthrottlecurvesforying.

WARNING:Forrst-timeuseorwhenmakingmechanicalchangesthatinvolvethrow,alwaysensureyouresettheservolimitstopreventbinding.Not

doingsowillcausethehelicoptertocrash,resultinginpropertydamageandinjury.

Menu Point

LEDs

Setup Button

Status LED

Parallel

DX9 screens shown

Menu A

Governor Off/On:

1. ThersttimeyoupowerontheAR7200BX,thegovernorwillbeOFF

(StatusLEDwillbeOFF).YoumustturnthegovernorONtoaccessallof

the menu options.

2. ToturnthegovernorON,pressandholdtheSetupButtonuntiltheStatus

LED is RED.

3.QuicklypresstheSetupButtontomovetoMenuB.

Menu B

Sensor Test Mode:

EachtimetheRPMsensoristriggered,theStatusLEDwillturnRED,

indicatingthatthesensorisdetectingcrankshaftrotation.

PresstheSetupButtontomovetoMenuC.

Menu C

Setting the Throttle Low Point:

TheStatusLEDwillturnSolidBluewhenthereceiverdetectsavalidlow

throttle point.

1. Lowerthetransmitterthrottlestickandconrmthatthecarburetorisfully

closed(Notidleposition).

2. ConrmthattheStatusLEDisBlue.

3.PresstheSetupButtontosavethelowthrottleposition.TheAR7200BX

will save the setting and move to Menu D.

Menu D

Setting the Throttle High Point:

TheStatusLEDwillturnSolidBluewhenthereceiverdetectsavalidhigh

throttle point.

1. Raisethetransmitterthrottlestickandconrmthatthecarburetorisfullyopen.

2. ConrmthattheStatusLEDisBlue.

3.PresstheSetupButtontosavethehighthrottleposition.TheAR7200BX

will save the setting and move to Menu E.

Menu E

Checking Activation Points for Throttle and RPM channel:

•TheStatusLEDwillturnBluewhenthethrottleisabovetheactivation

threshold(above25%throttle).

•TheStatusLEDwillturnRedwhentheRPMchannelisabovethe

activationthreshold(5%aboveorbelowthecenterposition).

Toactivatethegovernor,ALL of the following conditions must be met:

•TheRPMchannelis5%aboveorbelowthecenterposition.

•Thethrottlechannelisabove25%.

•TheRPMreaches60%oftheprogrammedtargetRPM.

ThegovernordeactivatesifANYofthefollowingconditionsaremet:

•TheRPMchanneliswithin5%ofthecenterposition.

•Thethrottlechannelisbelow25%.

•TheRPMislowerthan60RPM.

Afterconrmingtheactivationpoints,pressthebuttontomovetoMenuF.

Status-LED

OFF

Blue Solid

Above25%throttle

Red Solid

5%aboveorbelowcenterposition

Purple Solid

Both Red and Blue conditions are met.

Status-LED

OFF

Throttleisoutsidethevalidrange.

Blue Solid

Valid low throttle point

Status-LED

OFF

Throttleisoutsidethevalidrange.

Blue Solid

Valid high throttle point

Status-LED

OFF

GovernorOFF

Red Solid

GovernorON

Status-LED

OFF

RPMSensorOFF

Red Solid

RPMSensorON

IMPORTANT:TheSensorTestdoesnotguaranteegovernorperformance,butwillconrmifthesensorisdetectingcrankshaftrotation.

Menu F

Setting the RPM Prescaler:

Youcanaddequally-spacedmagnetstothefan,clutchormainshaftto

increasetheresolutionofthesensorreading.Theincreasedresolutionismost

helpfulwithlowRPM,gasolineengines.Ifyouareonlyusingonemagnet,

PrescalermustbeOFF.Otherwise,setthePrescalertothetotalnumberof

magnets. Options range from 2–7 magnets.

Menu G

Gear Ratio – First Digit:

You must set the appropriate gear ratio for your helicopter so the governor will

workproperlyatyourdesiredheadspeed.ThemenuG parameter enables you to

set the ﬁrst digit X(wherethegearratioisX.YZ)inarangefrom6to12.

Menu H and I

Gear Ratio – Second and Third Digits:

Menus H and I enable you to set the last two digits .YZ (where the gear ratio

is X.YZ). Setting the last two digits for your gear ratio requires a combination

of the H and I menus.

EXAMPLE: NeededGearRatiois7.95for.YZ=.95

Set Menu H to RED

Set Menu ItoREDFLASHING

Exiting the Menu:

When LED Iissolid,quicklypressthe

setup button to exit the menu.

If the gear ratio for your helicopter is

notshown,selecttheclosestratiofrom

the chart.

Status-LED

OFF

PrescalerOff

Purple Flashing

Prescalerdivideby2

Purple Solid

Prescalerdivideby3

Red Flashing

Prescalerdivideby4

Red Solid

Prescalerdivideby5

Blue Flashing

Prescalerdivideby6

Blue Solid

Prescalerdivideby7

Status-LED X.

OFF

Purple Flashing

Purple Solid

Red Flashing

Red Solid

Blue Flashing

Blue Solid

Status-LED .YZ

Status-LED

OFF

.00

OFF

.05

Purple Flashing

OFF

.10

Purple Solid

OFF

.15

Red Flashing

Purple Flashing

.20

OFF

Purple Flashing

.25

Purple Flashing

.30

Purple Solid

Purple Flashing

.35

Red Flashing

Purple Solid

.40

OFF

Purple Solid

.45

Purple Flashing

Purple Solid

.50

Purple Solid

.55

Red Flashing

.60

OFF

Red Flashing

.65

Purple Flashing

Red Flashing

.70

Purple Solid

Red Flashing

.75

Red Flashing

Red Solid

.80

OFF

Red Solid

.85

Purple Flashing

Red Solid

.90

Purple Solid

Red Solid

.95

Red Flashing

Governor Parameter Adjustments

To enter the Parameter Menu:

1. OncetheAR7200BXisinitialized,pressandholdthesetupbuttonuntil

theLEDashesnexttomenupoint(A).

2. Release the setup.

3.Pressthesetupbuttononcetomovetothenextmenupoint.The8menu

points (A through H)intheParameterMenuareunchanged.Thenew

menu points for governor functions are I through K.

4. Pressthesetupbuttononceatmenupoint(K)toexittheParameterMenu.

Parameter Menu I

Throttle Response In Unloaded Conditions:

AdjustParameterI to prevent the governor from over speeding the rotor head

or applying too much throttle when your helicopter goes from a loaded to an

unloaded condition.

•Enginesinlarger700-sizehelicoptersshouldusetheLowsetting.

•Smaller.30-sizeenginesshouldusetheAggressivesetting.

Parameter Menu J

Initial RPM Spool-Up Rate:

TheinitialspooluprateissetinRPM/second,anddeneshowquickthe

RPMincreasesfromthepointwherethegovernorisengaged,uptothenal

setRPM.Thissettingonlyapplieswhenthegovernoractivatesbyslowly

increasingthethrottle,otherwisethebailoutfunctionmayactivate(see

ParameterK: Bailout Function for more information).

Parameter Menu K

Bailout Function:

TheAR7200BXGovernorsupportsanintelligentautorotationbailoutfunction.

Whenthethrottlechannelvaluechangesfrombelow25%toabove60%

veryquickly,thegovernorselectsafasterspool-upratetocompensatefora

recovery from an autorotation (bailout).

Changingthesettingsintheparametermenuadjustshowaggressivelythe

throttle increases after the bailout is activated. If this parameter is set to

“BailoutOFF”,thespecialautorotationbailoutspoolupisdisabledandthe

default spool up behavior is used.

Status-LED

OFF

PCSet

Purple Solid

Low

Red Flashing

Moderate

Red Solid

Medium

Blue Flashing

Fast

Blue Solid

Aggressive

Status-LED

OFF

PCSet

Purple Solid

50RPM/s

Red Flashing

100RPM/s

Red Solid

200RPM/s

Blue Flashing

300RPM/s

Blue Solid

400RPM/s

Status-LED

OFF

PCSet

Purple Solid

Bailout OFF

Red Flashing

Smooth

Red Solid

Normal

Blue Flashing

Increased

Blue Solid

Heavy

CAUTION:Thebailoutfunctionenablesthegovernortobringtheenginebackuptospeedquickly.ThebladeboltsMUSTbeverytightorthebladesmayswing

backunderaccelerationandcauseaboomstrike.Ifthehelicopterhasaboomstrikeintheair,itwillbeunrecoverableandthehelicopterwillfalltotheground.