JR Racing XR2 User manual

2 Channel, 2 Model Memory
AM Computer Racing System
JR XR-2 7/15/99 8:35 AM Page 1

2
LithiumBattery 9
MemoryBackupScreen 9
AccessingtheSystemMode 10
ModelNameEntry 10
DataReset 11
AccessingtheFunctionMode 12
ModelSelect 13
TravelAdjust 14
SteeringRate 15
Sub-Trim 16
ServoReversing 17
AccessingtheDirect 18
TrimMode
SteeringTrim 19
ThrottleTrim 19
SteeringDualRateTrim 20
Adjustment(GripLeverB)
BrakeEndpointAdjustment 21
BRG(GripLeverA
ThrottleTravelAdjust)
XR-2DataSheet 22
FrequencyChart 22
Warrantyand 23
ServiceInformation
Introductionto 2
theXR-2RadioSystem
XR-2QuickStartSetup 3
SystemsFeatures 4
TransmitterFeatures 4
ReceiverFeatures 4
ServoFeatures 4
SystemSpecifications 4
SystemComponents 4
TransmitterSpecifications 4
ReceiverSpecifications 4
ServoSpecifications 4
ControlIdentification 5
andLocation
SteeringTensionAdjustment 6
ChargingJack 6
R/CSafetyPrecautions 6
Receiver/ServoConnections 7
andInstallation
OperatingYourModel 8
ServoLayout 8
KeyInputandDisplay 8
DisplayScreens 9
NormalDisplayScreen 9
LowBatteryScreen 9
Table of Contents
Introduction to the XR-2
Radio System
ThankyouforpurchasingtheXR-2two-channelradiosys-
tem.ThissystemhasbeendesignedtoprovidetheR/Cracer
withahighquality,userfriendlyradiosystemthatcanbe
dependeduponyearafteryear,raceafterrace.Itisimportant
thatyoucarefullyreadthismanualbeforeattemptingto
operateyourXR-2system.Foryourconvenience,ablank
datasheethasbeenincludedinthebackofthismanual.
Onceyouhaveinputallthenecessarydataforaparticular
modelintoyourtransmitter,westronglyrecommendthat
youimmediatelywritethatinformationdownonthedata
sheetprovided.Thisinsuresthat,intherarecaseofamem-
oryfailure,youwillnotloseyourmodels’set-updata.
Forthosewhowouldliketogetouttothetrackquicklywith
justthebasicradioset-up,pleaserefertotheQuickStart
sectionthatfollows.
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XR-2 Quick Start Setup
Inthismanualyou’llfindin-depthinstructionsdetailingall
thestepsandproceduresyou’llneedtofollowinorderto
programeachoftheXR-2’sfeaturescorrectly.Forthoserac-
erswhowanttogettothetrackfast,wehaveprovidedthe
QuickStartsectionbelow.QuickStartcoversthebasicpro-
gramminginformationnecessarytogetyoutothetrackfast.
Later,whenyouwanttolearnmoreaboutthespecific
featuresoftheXR-2,refertotheappropriatepage(s)inthis
manualformoredetailedprogramminginformation.
Servo Reversing
1. Withthetransmitterpowerswitchon,presstheMODE
keytoentertheFunctionMode.
2. PresstheMODEkeyfourtimesuntilSTappearsonthe
screen.TheSTindicatesthesteeringservoreversing
screen.
3. Presstheincreaseordecreasekeytomovethecursorto
thedesiredservodirection(Rev.Norm).
4. PresstheCHANNELkeyoncetoaccessthethrottleservo
reversingscreen.
5. Toselectthedirectionofthethrottleservo,repeatStep3
above.
Travel Adjustment
1. FromtheServoReversefunction,presstheMODEkey
twicetoaccesstheTravelAdjustmentfunction(theSTR
orSTLscreenwillappear).
Steering Adjustment:
2. Rotatethesteeringwheelinthedesireddirection(leftor
right)tobeadjusted.
3. PresstheINCREASEorDECREASEkeystoselectthe
desiredtravelvalue.
Throttle Adjustment:
4. PresstheCHANNELkeyonce.FWDwillappearonthe
screen.
5. PresstheINCREASEorDECREASEkeystoselectthe
desiredtravelvalue.
6. PresstheMODEandCHANNELkeysatthesametimeto
exittheFunctionMode.
Servo Trim Adjustment
Steering Servo Trim Adjustment:
1. Withthetransmitterpowerswitchon,movethedigital
steeringtrimleverinthedesiredpositiontobeadjusted.
Thesteeringtrimvaluescreenwillappearautomatically.
Throttle Servo Trim Adjustment:
2. Withthetransmitterpowerswitchon,movethedigital
throttletrimleverinthedesiredpositiontobeadjusted.
Thethrottletrimvaluescreenwillappearautomatically.
st
—
REV•NORM
MODE
ENTER
CHANNEL
MODE
Indicatescurrent
channel
ST=Steering
TH=Throttle
Indicatescurrent
servodirection
INCREASE
CLEAR
+–
DECREASE
CHANNEL
str
100
TRVADJ.
MODE
Indicatescurrent
adjustmentposition
STR=Steeringright
STL=Steeringleft
FWD=Forwardtrigger
BRM= Reverse
(brake)trigger
Indicatescurrent
value
st
0
tht
0
Indicatessteering
trimfunction
Indicatesthrottle
trimfunction
Indicatescurrent
value
Indicatescurrent
value
Throttletrim
Steeringtrim
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System Features
Transmitter Features
• TwoChannels
• AMmodulation
• Easy-to-readLCDgraphicsdisplay
• Twomodelmemory
• Three-digitmodelnameentry
• Electronicdigitaltrimleversforthrottleandsteering
• Twoassignableelectronicgriplevers
• Directdisplaytrimfunction
• Servoreversing
• Sub-trim
• Steeringdualrate
• Steeringendpointadjustment
(twopoints—leftandright)
• Brake/throttlepointadjustment
• Lowbatteryalarm
• Plug-incrystals
• Chargejackreceptacle(rechargeablebatteries
notincluded,orderJRPB958)
R-122 Receiver Features
• TwoChannels
• AMmodulation
• 27MHz/75MHzavailable
• Batteryeliminatorcircuitry(BEC)
• PatentedABC&Winterferencetechnology
Z250 Servo Features
• Zerodeadbandamplifierforaccurateneutralcentering
• Lowcurrentdrain
• Indirectdrivefeedbackpotentiometerforadditional
vibrationprotection
• SurfaceMountTechnology(SMT)
• Durablenylongeartrainforlonglife
System Specifications
System Components
XR-2 Transmitter Specifications
R-122 Receiver Specifications
Z250 Servo Specifications
Torque(oz/in) 40.3oz/in
Speed. 25sec/60
Weight(oz) 1.47oz
Size(in)(WxLxH) 0.73x1.52x1.32
Motor 3-poleferritetype
ModelNumber NER-122
Type 2-channel/AM
ABC&Wcircuitry
Frequency 27/75MHz
Sensitivity 5qsminimum
(microseconds)
Selectivity 8KHz/50dB
Weight(oz) .88oz
Size(in)(WxLxH) 1.26′′×1.76′′ ×.87′′
Receiverantenna 14.75′′
PowerSupply 4.8-6.0VD/C
Modelnumber XR-2
Encoder 2-channelcomputersystem
RFoutput 27/75MHz
Modulation AMmodulation
Outputpower 195.0Mw
Currentdrain 150mA
Powersource 1.2Vx8drycell
(1.2V×8NiCad
600mAhoptional)
Outputpulse 1000-2000(1500neutral)
Systemname XR-2
Transmitter NETXR-2
Receiver R-122
Servos Z250x2(1ifequippedwithESC
speedcontrol)
Accessories B.E.C.switchharnesswithbat-
terycaseServoaccessories(for
twoservos)Instructionmanual
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Control Identification and Location
Antenna
Steeringwheel
Electronicdigital
steeringtrimlever
DotMatrixmulti-
dataLCDdisplay
3digitnameinput
Digitalvoltage
reading
Electronicdigital
gripleverA
Electronicdigital
gripleverB
Powerswitch Chargejack
Modebutton
=Enterfunction
=Clearfunction
Channelbutton
Increasebutton
Decreasebutton
Electronicdigital
throttletrimlever
Throttletrigger
Adjustable
steeringtension
Batterycover*
(8AAbatteriesrequired)
*Toremove,pressdown where it says “press”andpushthecoverinthedirection of the arrow.
Removethebatterycase and install eight AAbatteriesinthedirectionshownasmolded into the
batterycase.Iftransmitter voltage fails to register,checkforcorrectbatteryinstallationandvoltage.
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R/C Safety Precautions
ForsafeandreliableperformanceofyourR/Cmodel,please
carefullyreadandfollowtheseguidelines:
1. Radiocontrolmodelsarenottoys.Theyarecapableof
inflictingseriousinjurytopeopleandproperty.Usecau-
tionatalltimeswhenoperatingyourmodel.
2. YouareresponsibleforthesafeoperationofyourR/C
model.Youmustproperlyinstall,testandoperateyour
modelwithaclearsenseofthatresponsibility.Donot
takerisksthatmightendangeryourselforothers.
3. RunninganR/Ccarinthestreetsisverydangerousto
bothdriversandmodels.Avoidrunningyourmodelin
areasoccupiedbyfullsizeautomobiles.Tolocateareas
whereyoucansafelyoperateyourmodel,youshould
contactyourlocalhobbyshopforR/Ctracksorclubsin
yourarea.
4. WhenrunninganR/Cboat,keepitawayfromanyswim-
mers,fullsizeboats,orwildlife.Also,watchcarefullyfor
fishinglinesthatcanentanglethepropeller.
5. Beforeoperatingyourmodel,makesureyourfrequencyis
clear.Ifsomeoneelseisoperatingonthesamefrequency,
bothmodelswillgooutofcontrol,possiblycausingdam-
agetothemodelsaswellasothers.
6. IfatanytimewhileoperatingyourR/Cmodelyousense
abnormalmodelfunctioning,endyouroperationimmedi-
ately.Donotoperateyourmodelagainuntilyouarecer-
taintheproblemhasbeencorrected.
CAUTION: Controlofyourmodelisimpossiblewithoutsuf-
ficientvoltageforthetransmitterandreceiver.Aweaktrans-
mitterbatterywilldecreaseyourrangeofoperationanda
weakreceiverbatterywillslowservomovementand
decreaseyourrangeofoperation.Checkyourreceiverpack
voltageoftentoavoidlosingcontrolofyourmodel.When
usingamodelthatoperatesboththeelectricmotorandthe
receiverfromthesamebattery(BatteryEliminatingCircuitry
orB.E.C.),youshoulddiscontinueusewhenthetopspeed
sharplydecreasesoryouwillquicklylosecontrolofyour
model.
Steering Tension
Adjustment
Steeringtensionisadjustableviatherecessedscrewlocated
beneaththesteeringwheel(seepage5forexactlocation).
Turningthescrewclockwiseincreasesthesteeringtension.
Charging Jack
Locatedontheright-handsideofthetransmitteristhe
chargingjack,whichacceptsonlyJRwallchargers.Please
donotattempttouseanyotherbrandofwallchargerasit
maybereversepolarityandcancausedamagetoyour
system.OnlyusetheJRwallchargerwhentheXR-2is
equippedwithNi-Cadbatteries(notincluded,JRPB958).
JR TRANSMITTER CHARGE JACK POLARITY:
Charger Pigtail For Transmitter
Black To Positive
Red To Negative
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Receiver/Servo Connections
and Installation
YourR-122ReceiverisequippedwithBatteryEliminator
Circuitry(B.E.C.).Thereceivergetsitspowerfromthe
model’sNi-Cadbatterypack,thussavingtheweightofan
additionalreceiverbattery.Ni-Cadbatteriesfrom4.8–8.4V
(4–7cells)canbeusedsafely.Highervoltagepacksmay
damagethereceiverandservos.
Note: WhenusingaseparatereceiverNi-Cadasapower
source,theoperatingvoltagerangeis4.8–6.0V
(4–5cell)
Attention: Makesurethemaleandfemaleconnectorshave
thecorrectpolarity(+/–)beforeconnecting.Theservolead
andreceivercasearemoldedsothattheleadcanonlybe
insertedcorrectly.Besuretoorienttheservoplugcorrectly
forproperinsertion.
Youmayuseaseparategastopowerthereceiver(suchas
forsomeelectricboatsoringas-poweredvehicles).ANi-
CadpackpluggedintotheBATTsocketonyourreceiverwill
operateyourreceiver.Youmayalsousealkalinebatteries
withtheincludedbatterybox.
Ifyouuseamechanicalspeedcontroller,pleasemakesure
thatithasthecorrectconnectorforaB.E.C.system(redcon-
nector).SeeFigureAbelowforatypicalset-up.
MostelectronicspeedcontrollersaresetupforB.E.C.oper-
ationandplugdirectlyintoyourreceiver(Function2).See
FigureBforatypicalset-upandcheckyourspeed
controller’smanualforcorrectinstallation.
BEC
BEC
Figure A – Connections toB.E.C.receiverwithmechanicalspeed
controller.Ni-Cadbatteryand speed controller are notincludedinthe
radioset.
Figure B – Connections toB.E.C.receiverwith
electronicspeedcontroller.Ni-Cad battery and
speedcontrollerarenot included in the radioset.
ToResistors Mechanical
SpeedControl
BECConnector
Switch
R-122Receiver
R-122 Z250Servos
ToMotor
BatteryBox
(Forusewithoptional
separatereceiverbattery
power)
7.2V-8.4VBattery
7.2–8.4VBattery
R122Receiver
R122
Z250Servo
BECConnector
E.S.C.
ToMotor
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Operating Your Model
It’simportanttolearnthepropersequenceforswitching
on/offyourradiosystem:
BEFORE OPERATION:Switchonthetransmitter,thenthe
receiver.
AFTER OPERATION:Switchoffthereceiver,thenthe
transmitter.
Thisensuresthatyouwillalwayshaveasignaltothereceiv-
er,andyourR/Cmodelwillnotoperateoutofcontrolwhen
youturnoffthetransmitter.
Servo Mounting Flange
Rubber Grommets
Rubber Grommets
Servo Case
Servo Lead w/Connector
Servo Output Shaft
Servo Mounting Flange Servo Arm/Horn
Servo Arm Retaining Screw
Servo Eyelet
Z250 Servo
Top View
Key Input and Display
MODE
ENTER
CHANNEL
ToentertheFunction Mode press the MODE
keywhilethetransmitter is on. Press the INCREASEandDECREASEkeys
simultaneouslytoclearthe screen or return
tofactorypreset.
ToentertheSystem Mode press the MODE
andCHANNELkeyssimultaneously and
holdwhileturningon the transmitter.
INCREASE
CLEAR
+–
DECREASE
Servo Layout
Note: Rubbergrommets
and(sometimes)
eyeletsareusedin
fuel-powered
vehicles.
KEY
MODE
CHANNEL
INCREASE
DECREASE
Usedtomoveup through the available functions
Usedtoselectthe desired channel
Usedtoincreasethe value of the selectedfunction
Usedtodecreasethe value of the selectedfunction
USE
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Display Screens
Normal Display Screen
Whenthepowerswitchisturnedon,theLCDscreenwill
readasshownhereinthediagram.Thisscreenisreferredto
astheNormalDisplay.
Note: Ifanyoftheelectronictrimbuttonsaremoved
whileinthisscreen,thescreenwillautomatically
changetodisplaythetriminuse.Thisiscalled
theDirectTrimMode.Formoreinformationon
thefeature,pleaseseepage19ofthismanual.
Low Battery Screen/Lithium Battery
Backup
WhenthevoltageoftheeightAAbatteriesdropsbelow9.0
volts,theXR-2’sdisplayscreenwillalternatebetweenthe
Normal(seeabove)andLowBatteryscreen(BATT)anda
continuousbeepingwilloccur,indicatingthatthebatteries
needtobereplacedbeforefurtheruse.TheLowBattery
screenisactiveduringanyofthethreeoperatingmodes.
Lithium Battery
YourXR-2radiosystemisequippedwitha5yearlithium
batterybackupsystem.Thissystemisdesignedtoprotect
andretainallradioprogrammingintheeventthatthetrans-
mitterbatteriesdropbelowtherequired9.0volts,orthe
transmitterbatterycaseisremovedduringbatterychanges.If
afterfiveyearsitbecomesnecessarytoreplacethelithium
battery,returnyoursystemtotheHorizonServiceCenterfor
repair(seeaddress,page23).
Memory Backup Screen
IftheMemoryBackupscreenappears,thisindicatesthatany
programmingchangesmadesincethelasttimethesystem
wasturnedonmustbesavedbypressingtheMODEand
CHANNELbuttonsatthesametime.Ifyoudonotsave,the
recentprogrammingchangeswillbelost.Ifthisscreen
appearsforasecondtime,itissuggestedthattheXR-2
transmitterbereturnedtotheHorizonServiceCenterforser-
vicing(seeWarrantyInformation,page23).
bat
8.9V
md !
10.2V
bak
ER
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Accessing the Model Name
Entry Function
ToaccesstheModelNameEntryfunction,followthesteps
below:
1. PresstheMODEandCHANNELkeysatthesametimeand
hold.
2. TurnonthetransmitterpowerswitchtoentertheSystem
Mode.
3. MD1shouldnowbepresentonthescreen.
4. PresstheINCREASEorDECREASEkeystoselectthecor-
rectletter/numberforthefirstcharacter(flashing).
5. Tochangetheremainingtwocharacters,presstheCHAN-
NELkeyuntilthedesiredcharactertobechangedisflash-
ing.
6. ToaccesstheDataResetfunction,presstheMODEkey.
ToexittheSystemMode,eitherturnthetransmitterpower
switchofforpresstheMODEandCHANNELkeysatthe
sametime.
Model Name Entry
(System Mode)
TheXR-2allowsathree-digitnametobeinputforeachof
thetwo(2)modelsavailable.Thecurrentmodel,withname,
willthenbedisplayedintheNormaldisplayscreen.Thisfea-
tureisusefultohelpidentifydifferentmodels,setups,etc.
Forinformationonselectingmodels1or2,pleasereferto
theModelSelectFunction(page13).
10
Accessing the System Mode
ToentertheSystemMode,pressboththeMODEandCHAN-
NELkeysatthesametimewhileturningonthetransmitter
powerswitch.BypressingtheMODEkey,youcannow
selecteitherthemodelnameinputordataresetfunctionsas
shownhereontheSystemModeflowchart.Informationfor
eachfunctionislocatedonthepagenumberlistednextto
thefunctionnameontheflowchart.
ToexittheSystemMode,presstheMODEandCHANNEL
keysatthesametime,orsimplyturnoffthetransmitter.
md !
1
md !
1
clr
1
ModelNameEntry,
page10
Flashingcharacter
indicatesthecharacter
tobeadjusted
Currentmodel
number
DataReset,page11
MODE
ENTER
CHANNEL
INCREASE
CLEAR
+–
DECREASE
PresstheMODEand
CHANNELkeysatthe
sametimeandhold to
entertheSystemMode
PresstheCHANNEL
keytoselectthe
charactertobe
changed
Presstheincreaseor
decreasekeystoselect
thecorrectletter/
numbertobeused
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Data Reset (System Mode)
TheDataResetfunctionallowsyoutoresetalltheprogram-
mingintheselectedmodel(1or2)tothefactorydefaultset-
tings.BeforeusingtheDataResetfunction,it’simportantto
entertheModelSelectfunctionandchecktomakesurethe
currentmodelnumberindicated(1or2)isthemodelto
whichyouwanttoresettothefactorydefaultsettings.The
ModelSelectfunctionisdescribedinonpage13.
Accessing the Data Reset Function
ToaccesstheDataResetfunction,followthestepsbelow:
1. PresstheMODEandCHANNELkeysatthesametimeand
hold.
2. TurnonthetransmitterpowerswitchtoentertheSystem
Mode.
3. PresstheMODEkeyonceuntilCLRappearsonthe
screen.
4. PresstheINCREASEorDECREASEkeysatthesametime
toresetthedata.Toconfirmthattheselectedmodel’spro-
gramminghasbeenreset,abeepwillsoundandthe
modelnumberselected(1or2)willstopflashing.
5. ToexittheSystemMode,eitherturnthetransmitterpower
switchofforpresstheMODEandCHANNELkeysatthe
sametime.
MODE
ENTER
CHANNEL
INCREASE
CLEAR
+–
DECREASE
PresstheMODEkey to
accesstheModel
NameEntryfunction
PresstheINCREASEand DECREASE keys at
thesametimeto reset (clear) all settingsforthe
selectedmodeltothe factory default settings
clr
1Indicatesmodelto
bereset
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Accessing the
Function Mode
Toenterthefunctionmode,it’snecessarytofirstturnonthe
transmitter’spowerswitch.Next,presstheMODEkeyuntila
beepisheard.Thedisplaywillchangetoshowthefirstfunc-
tionlistedontheFunctionModeflowchartasshownbelow.
PresstheMODEkeytoscrolldownthroughthefunctions
onebyone,asshownintheflowchart.Oncethedesired
functionhasbeenreached,usethechannelkeytoselectthe
appropriatechannel(ifapplicable).Toadjustthevaluesof
thefunction,simplypresstheINCREASE(+)orDECREASE
(-)keysuntilthedesiredvalueisdisplayedonthescreen.
md !
1
str
100
fwd
100
TRVADJ. TRVADJ.
st
0
stm
100∞
D/R
SB-TRM th
0
SB-TRM
th
—
REV•NORM
st
—
REV•NORM
Mode Key Channel Key
ModelSelect,page13
TravelAdjust,page14
SteeringRate,page15
Sub-Trim,page16
ServoReversing,page17
Channel
key
Channel
key
Channel
key
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Model Select
(Function Mode)
TheXR-2hasmemoryfortwo(2)models.Thisfeature
allowsforeithertwodifferentmodelstobeoperatedwiththe
sametransmitter(asecondreceiverandservosmustbepur-
chasedseparately),oronemodelwithtwo(2)differentrace
setups.
Accessing the Model Select Function
ToaccesstheModelSelectfunction,followthestepsbelow:
1. Turnthetransmitterpowerswitchon.
2. PresstheMODEkeytoaccesstheFunctionMode.
3. PresstheMODEkeyuntilMDLappearsonthescreen.
4. PresstheINCREASEorDECREASEkeystoselectthe
desiredmodelnumber(1or2).
5. PresstheMODEkeytoaccesstheTravelAdjustfunction.
6. ToexittheFunctionMode,eitherturnoffthetransmitter
powerswitchorpresstheMODEandCHANNELkeysat
thesametime.
mdl
1
MODE
ENTER
CHANNEL
INCREASE
CLEAR
+–
DECREASE
IndicatesModel
Selectfuction
Indicatescurrent
modelnumber
PresstheMODEkey
untilMDLappearson
thescreen
PresstheINCREASEand DECREASE keys to
selectthedesiredmodel to be used (1or2)
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14
Travel Adjust
(Function Mode)
TheTravelAdjustfeatureoftheXR-2allowsthemaximum
travelofboththesteeringandthrottleservostobeincreased
ordecreasedineachdirectiontoachievetheexactservo
movementneeded.Theadjustmentrangeisfrom0%to
125%.Thetraveladjustmentisfactorysetto100%forboth
channels.Thetraveladjustmentvaluedisplayedonthe
screendependsonthecurrentpositionofthesteeringwheel,
trigger,ortrimlevertobeadjusted.Thisfeatureisveryuse-
fuleithertomaximizeservotravelortoreduceservoover-
traveltoeliminateservobinding(servomovesfurtherthan
controlmechanismallows),withouttheneedformechanical
linkageadjustment.
Thescreensbelowareaccessedbyturningthewheeltothe
desireddirectiontobeadjusted(leftorright)ormovingthe
triggertotheforwardorbackward(brake)position.
Accessing The Travel Adjust
Function
ToaccesstheTravelAdjustfeature,followthestepbelow:
1. Turnonthetransmitterpowerswitch
2 PresstheMODEkeytoentertheFunctionMode.
3. PresstheMODEkeyuntilTRVADJappearsinsmalllet-
tersontheleftsideofthescreen.
4. PresstheCHANNELkeytoselectthedesiredchannelto
beadjusted.Steering=STR(steeringright)orSTL(steer-
ingleft);Throttle=FWD(forward)orBRM(brakingor
reverse)
5. Movethesteeringwheelortriggerinthedesireddirection
foradjustment(left/right,forward/reverseorbrake).Press
theINCREASEorDECREASEkeytoachievethedesired
amountoftravel.Movethewheel/triggerintheopposite
directiontoadjustthetravelintheoppositedirection.
6. PresstheMODEkeytoaccesstheSteeringDualRate
function.
7. ToexittheFunctionMode,eitherturnoffthetransmitter
powerswitchorpresstheMODEandCHANNELkeysat
thesametime.
Note: Whensettingthetravel adjust values for the
steeringfunction,it’ssuggested that if possible
themaximumtravelvalues be set to anequal
valueinbothdirections to maintain proper steer-
ingcontrol.
MODE
ENTER
CHANNEL
INCREASE
CLEAR
+–
DECREASE
stl
100
fwd
100
TRVADJ.
str
100
TRVADJ.
TRVADJ.
brm
100
TRVADJ.
Indicatessteeringleft
traveladjustment
Indicatescurrent
value
Indicatessteering
righttraveladjustment
Indicatesforward
throttletravel
adjustment
Indicatesreverse
(brake)travel
adjustment
Indicatescurrent
value
Indicatescurrent
value
Indicatescurrent
value
PresstheMODEkey
until TRV ADJappears
onthescreen
PresstheCHANNEL
keytoselectthe
channeltobeadjusted
(steeringorthrottle)
Movethewheel/triggerin the desired direction
andpresseitherthe INCREASE or DECREASE
keystoachievethe desired travel value
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15
Steering Rate
(Function Mode)
TheSteeringRatefeatureoftheXR-2allowsthesteering
servotraveltobeincreasedordecreasedtothedesired
amountrequired.ThevaluesoftheSteeringRatefunction
areapercentagebasedfromthetraveladjustvaluesetinthe
TravelAdjustsection.
Example:Traveladjustvalue100%,Steeringvalue80%—
Maximumsteeringrateisnowreducedto80%ofthemaxi-
mumtravelvalue(100%)
TheSteeringRatefunctionalsoworksinconjunctionwith
theGripLeverBSteeringRatefunction(page20)andactsas
themaximumrateavailablethroughgripdialB.Thisfeature
allowsthesteeringratetobeincreasedordecreaseddirectly
fromthegripleverBwhileracingtomaximizethesteering
rateneededfortheparticulartrackconditions.
Accessing the Steering Rate
Function
ToaccesstheSteeringRateFunction,followthesteps
below:
1. Turnonthetransmitterpowerswitch.
2. PresstheMODEkeytoentertheFunctionMode.
3. PresstheMODEkeyuntilD/RSTMappearsonthe
screen.
4. PresstheINCREASEorDECREASEkeysuntiltheproper
steeringrateisachieved.
5. PresstheMODEkeytoaccesstheSub-Trimfunction.
6. ToexittheFunctionMode,eitherturnoffthetransmitter
powerswitchorpresstheMODEandCHANNELkeysat
thesametime.
MODE
ENTER
CHANNEL
INCREASE
CLEAR
+–
DECREASE
stm
100∞
D/R IndicatesSteering
Ratefunction
Indicatescurrent
value
PresstheINCREASEor DECREASE keys to
achievethedesiredsteering rate value
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16
Sub-Trim (Function Mode)
TheSubTrimfunctionoftheXR-2isanelectronictrimming
featurethatallowstheneutralpositionoftheservooneither
thesteeringorthrottlechanneltobemoved,whileallowing
theelectronictrimleverforthatchanneltoremaininthecen-
terposition.Thisfeatureisveryusefulasitallowstheservo
arm/wheelpositiontobemovedtohelpwithcontrollinkage
installation,eliminatingtheneedtomakemechanicallinkage
adjustments.
AlthoughtheSub-Trimfunctionisaveryusefulfeature,itis
suggestedthatonlysmallamountsofsub-trimbeusedso
thatnounwanted,non-equalservotraveliscreated.It’ssug-
gestedthatlessthan30pointsofsub-trimbeusedduring
adjustment.Ifmorethan30pointsofsub-trimarerequired,
it’ssuggestedthatamechanicallinkageadjustmentbeper-
formed.
Accessing the Sub-Trim Function
ToaccesstheSub-Trimfunction,followthestepsbelow:
1. Turnonthetransmitterpowerswitch.
2. PresstheMODEkeytoentertheFunctionMode.
3. PresstheMODEkeyuntilSB-TRIMappearsinsmall
letterstotheleftofthescreen.
4. PresstheCHANNELkeytoselectthechanneltobe
adjusted(ST=Steering,TH=Throttle).
5. PresstheINCREASEorDECREASEkeysuntiltheproper
servopositionisachieved.
6. PresstheModekeytoaccesstheServoReversing
function.
7. ToexittheFunctionMode,eitherturnoffthetransmitter
powerswitchorpresstheMODEandCHANNELkeysat
thesametime.
MODE
ENTER
CHANNEL
INCREASE
CLEAR
+–
DECREASE
st
0
SB-TRM Indicatescurrent
channel
ST=Steering
TH=Throttle
Indicatescurrent
value
PresstheCHANNEL
keytoselectthe
desiredchanneltobe
adjusted
ST = Steering
TH=Throttle
PresstheINCREASEor DECREASE keys to
achievethedesiredsub-trim value
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17
Accessing the Servo
Reversing Function
ToaccesstheServoReversingfunction,followthesteps
below:
1. Turnthetransmitterpowerswitchon.
2. PresstheMODEkeytoaccesstheFunctionMode.
3. PresstheMODEkeyuntilREV.NORMappearsinsmall
letterstotherightofthescreen.
4. PresstheCHANNELkeytoselectthechanneltobe
changed(ST=Steering,TH=Throttle).
5. PresstheINCREASEorDECREASEkeystomovethecur-
sortothedesireddirection.
6. ToexittheFunctionMode,eitherturnoffthetransmitter
powerswitchorpresstheMODEandCHANNELkeysat
thesametime.
Servo Reversing
(Function Mode)
TheServoReversingfeatureoftheXR-2isaveryconvenient
featurewhensettingupanewmodel.Thepurposeofthe
servoreversingfunctionistochangethedirectionofthe
servorotationinrelationtothewheel/triggermovement.The
ServoReversingfunctionisavailableforboththesteering
andthrottlechannelsoftheXR-2. MODE
ENTER
CHANNEL
INCREASE
CLEAR
+–
DECREASE
Indicatescurrent
channel
ST=Steering
TH=Throttle
Cursorindicates
currentservo
direction
st
—
REV•NORM
PresstheCHANNEL
keytoselectthe
desiredchanneltobe
adjusted
ST=Steering
TH=Throttle
PresstheINCREASEor DECREASE keys to
movethecursorto the desired servo direction
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18
Accessing the Direct
Trim Mode
TheDirectModefunctionoftheXR-2isaccessiblethrough
theuseoftheelectronicthrottleorsteeringtrimlevers,as
wellasthetwoelectronicgriplevers(A&B)locatedonthe
upperportionofthegriphandle.Thisfunctionallowsfor
quicktrimadjustmentofthesecontrols,withouttheneedto
accessthesefunctionsthroughthefourkeypadcontrolkeys.
ToaccesstheDirectTrimModefunction,turnonthetrans-
mitterpowerswitch.Next,movethedesiredtrimlevertobe
adjusted.Theappropriatescreenfortheselectedtrimlever
willbedisplayed.Toadjust,simplymovethetrimleverin
thedesireddirectionuntilthecorrectamountoftrimis
achieved.Oncethedesiredtrimisachieved,thescreenwill
returntotheNormaldisplayscreenafterapproximatelyfive
secondsfromthelasttriminput.IftheMODEorCHANNEL
keyarepressedanytimeduringthefiveseconds,thesystem
willreturntothepreviousscreeninuse.
stt
0
tht
0
brg
50
TRVADJ.
stg
70∞
D/R
SteeringTrim,page19
ThrottleTrim,page19
SteeringDualRate(Grip Lever B), page 20
BrakeTravelAdjustment(Grip Lever A), page 21
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19
Toadjustthesteeringtrimservoposition,movethe
electronicsteeringtrimlevereithertotheleft(+)ortheright
(-).Assoonasthetrimismoved,theSTTsteeringtrim
screenwillappear,andwillcontinuetobedisplayedunless
thetrimleverisuntouchedforaperiodoffiveseconds.To
resetthetrimvalueto0,presstheINCREASEand
DECREASEkeysatthesametimewhiletheSTTscreenis
displayed.
Steering Trim (STT)
TheXR-2electronicsteeringtrimlever,locatedjustabove
thesteeringwheel,allowsthecenterpositionoftheservoto
bemanipulatedineitherdirectiontoachieveprecisecenter-
ingofthesteeringassembly.Steeringendpointadjustment
values(page14)remaincompletelyindependentfromthe
steeringtrim,unlessthetrimvalueexceedstheselected
endpointvalues.(Forexample:Iftrimvaluearesetat40and
endpointvaluesat30,steeringtrimwilloverride/alterthe
endpointvalue.)
INCREASE
CLEAR
+–
DECREASE
stt
0
Indcatessteering
trimscreen
Currentvalue
PresstheINCREASEand DECREASE keys at
thesametimeto reset the steering trimtozero SteeringTrimLocation
Steeringtrim
Righttrim(–)Lefttrim(+)
PresstheINCREASEand DECREASE keys at the
sametimetoreset the throttle trim valuetozero
Throttle Trim (THT)
TheXR-2electronicthrottletrimlever,locatedtotherightof
thesteeringwheel,allowsthecenterpositionoftheservoto
bemanipulatedineitherdirectiontoachieveprecisecenter-
ingofthethrottletriggerneutralposition.Throttleendpoint
adjustmentvalues(page14)remaincompletelyindependent
fromthethrottletrim,unlessthetrimvalueexceedsthe
selectedendpointvalues.(Forexample:Ifthetrimvalueis
setat40andtheendpointvaluesat30,throttletrimwill
override/altertheendpointvalue.)
Toadjustthethrottletrimservoposition,movetheelectronic
steeringtrimlevereitherup(+)ordown(-).Assoonasthe
trimismoved,theTHTthrottletrimscreenwillappear,and
willcontinuetobedisplayedunlessthetrimleveris
untouchedforaperiodoffiveseconds.Toresetthetrim
valuetozero,presstheINCREASEandDECREASEkeysat
thesametimewhiletheTHTscreenisdisplayed.
INCREASE
CLEAR
+–
DECREASE
Currentvalue
ThrottleTrimLocation
Throttletrim
Decrease
Increase
tht
0
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20
Steering Dual Rate Trim
Adjustment STG (Grip Lever B)
Thesteeringdualrateadjustment,locatedatgripleverB,
allowsthedualratevalue(maximumservotravel)tobe
increasedordecreasedwithinarangefrom100%through
40%ofthetotaldualratevalueestablishedintheSteering
Ratefunction(page15).Thisfunctionisveryusefulinrace
conditionsasitallowsyoutocustomtailorthesteering
radiusandsensitivityforthecurrenttrackconditions.Please
notethatsincethedualratevalueshownintheSTGscreen
isthepercentageofthevalueestablishedintheSteering
Ratefunction,thevaluewillnotalwaysincreaseordecrease,
orbeeponceforeachtimethegripleverBismoved.
Toadjustthesteeringdualratevalue,movetheelectronic
gripleverBeitherleft(-)orright(+).Assoonasthetrimis
moved,theSTGsteeringdualratescreenwillappear,and
willcontinuetobedisplayedunlessthegripleverBis
untouchedforaperiodoffiveseconds.Toresetthetrim
valuetothefactorypreset70%setting,presstheINCREASE
andDECREASEkeysatthesametimewhiletheSTGscreen
isdisplayed.
A
B
stg
70∞
D/R
Currentvalue
INCREASE
CLEAR
+–
DECREASE
Decrease Increase
GripLeverB
PresstheINCREASEand DECREASE keys at thesametime
toresetthesteering dual rate trim tothefactorypreset(70%)
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