Raymarine Rotary Drive User manual

Distributed by
Any reference to Raytheon or
RTN in this manual should be
interpreted as Raymarine.
The names Raytheon and RTN
are owned by the
Raytheon Company.

Rotary Drive
Installation Guide
Drives covered:
M81135 Type 1 Rotary Drive 12 V
M81136 Type 2 Rotary Drive 12 V
M81137 Type 2 Rotary Drive 24 V
Document number: 81174-3
March 2001

2 Rotary Drive - Installation Guide
Important information
Safety notices
WARNING: Product installation
Thisequipmentmustbeinstalledandoperatedinaccordance
withtheinstructionscontainedinthishandbook.Failuretodoso
couldresultinpoorproductperformance,personalinjuryand/
ordamagetoyourboat.
Because correctperformance of the boat’ssteering is critical for
safety,weSTRONGLYRECOMMENDthatanAuthorized
RaymarineServiceRepresentativefits thisproduct.
WARNING: Navigation aid
Althoughwehavedesignedthisproducttobe accurateand
reliable,many factorscan affectits performance. Asaresult,it
should onlybeusedasanaidto navigationandshouldnever
replacecommonsenseandnavigationaljudgement.Always
maintainapermanentwatchsoyou canrespondtosituationsas
theydevelop.
EMC conformance
All Raymarine equipment and accessories aredesigned tothe best
industrystandardsfor use in the recreational marine environment.
The design and manufacture of Raymarine equipment and
accessories conform totheappropriate Electromagnetic
Compatibility(EMC)standards,butcorrectinstallationisrequiredto
ensure that performance is not compromised.
Handbook information
To the bestof our knowledge, the information in this handbook was
correct when it went to press. However, Raymarine cannot accept
liabilityforanyinaccuraciesoromissionsitmaycontain.Inaddition,
ourpolicyofcontinuousproductimprovementmaychange
specifications withoutnotice. Asaresult, Raymarine cannot accept
liabilityfor any differences between the product and the handbook.
©RaymarineLtd2001.

Rotary Drive - Installation Guide 3
Introduction
Product description
Welcometothe installationguideforthe Raymarine rotarydrive.
This product is intended tooperate the boat’s steering mechanism as
part ofa Raymarine autopilot system. It is designedfor steering
systemsthatcanbedrivenfromthehelmpositionthroughachainand
sprocket(for example: cable androdsteering systems).
The outstanding design of the Raymarine rotary driveunit provides
smooth,powerfulautopilot-controlledsteeringwith quietoperation.
The mainparts ofthe drive are:
• a rugged electric motor, that drives a precision epicyclic gearbox
viaa high tensiledrive belt
• anelectromagneticclutch thattransmitshigh torque loads
without slipping
Figure 1: Main parts of the rotary drive
Contents
Thisguidecontains:
1Product specifications page 4
2Installation instructions page 5
3Maintenance information page 15
D5082-1
Clutch cable
Motor cables
Mounting foot
Drive shaft
Motor, gearbox
and clutch assembly

4 Rotary Drive - Installation Guide
Specifications
Drive dimensions
Figure 2: Drive dimensions
Drive specifications
Table 1: Drive specifications
Performance
(at nominal voltage)
Type 1 (T1)
M81135 (12 V)
Type 2 (T2)
M81136 (12 V)
M81137 (24 V)
Maximum boat
displacement
10,000 kg
(22,000 lb)
20,000 kg
(44,000 lb)
Peak output torque 20 Nm
(180 lb.in)
34 Nm
(300 lb.in)
Maximum shaft speed 33 rpm 33 rpm
Recommended hardover
to hardover time (no load)
10 sec 10 sec
Power consumption
(typical average)
24-48 W 60-84 W (12 V)
72-120 W (24 V)
274 mm (10.8 in)
195 mm
(7.7 in)
256 mm (10 in)20 mm (0.8 in)
184 mm
(7.2 in) 60 mm
(2.4 in)
60 mm
(2.4 in)
D5087-1
2 slots to accept
12 mm (0.5 in) bolts

Rotary Drive - Installation Guide 5
Installation instructions
Parts required
To install thisdrive you will need:
•Partssupplied:
•rotarydrive
•mountingfoot
•spacing shims (x3)
•Additional parts:
•suitable securing bolts andlock washers/lock nuts (see
page 9)
•suitable sprockets and grubscrews for drive andsteering
system(see page 9)
•thread-lockingcompound
•suitable drive chain (see page 9)
•suitable cable and electrical connectors for the drive motor
andclutch (seepage 13)
Note:Makesureyouhaveobtainedtheseadditionalpartsbeforeyou
startinstallation.
Other information (applies to Types 1 and 2)
protected for use in engine compartments
CE approvals - conforms to:
89/336/EC (EMC), EN60945:1997
94/25/EC (RCD), EN28846:1993
Table 1: Drive specifications (contd)

6 Rotary Drive - Installation Guide
Installation steps
WARNING: Electrical safety
Make sure you have switched off thepower supply before you
start installingthis product.
Followthesestepsto installyourrotarydriveunit:
Ï
Ï
Ï
1. EMC installation guidelines
All Raymarine equipment and accessories aredesigned tothe best
industrystandardsfor use in the recreational marine environment.
Theirdesignandmanufacture conformstothe appropriate
Electromagnetic Compatibility(EMC) standards,butcorrect
installation is required to ensure that performance is not
compromised.Although every effort hasbeen taken to ensure that
they willperform under all conditions, it isimportant to understand
whatfactorscould affectthe operationoftheproduct.
TheguidelinesgivenheredescribetheconditionsforoptimumEMC
performance, butit is recognized that it may not be possible to meet
all of these conditions in all situations. To ensure the bestpossible
conditionsfor EMC performance withinthe constraintsimposedby
any location, always ensure the maximum separation possible
between different items of electrical equipment.
For optimumEMC performance, itis recommendedthat wherever
possible:
•Raymarine equipment and cables connected toit are:
1Consult the EMC installation guidelines. page 6
2Mount the drive. page 8
3Connect to the course computer. page 13
4Complete the post-installation check. page 15

Rotary Drive - Installation Guide 7
•Atleast3 ft(1 m)from anyequipmenttransmittingorcables
carryingradiosignalse.g. VHFradios,cablesand antennas.
In the case ofSSB radios, the distance should beincreased to
7ft(2m).
•More than7 ft(2 m)fromthepath ofa radarbeam. A radar
beam can normally be assumed to spread 20 degrees above
andbelow the radiatingelement.
•Theequipmentissuppliedfrom a separatebattery from that used
forenginestart. Voltagedropsbelow10 V,andstartermotor
transients,cancausetheequipment toreset.Thiswill notdamage
theequipment,butmay cause thelossof some informationand
maychangethe operatingmode.
•Raymarine specified cablesare used. Cutting andrejoining these
cables can compromiseEMC performance andmustbe avoided
unless doing so is detailed in the installation manual.
•Ifasuppressionferriteisattachedtoacable,thisferriteshouldnot
beremoved.Iftheferriteneeds tobe removed during installation
it must be reassembled in the same position.
Suppression ferrites
The following illustration shows typicalcablesuppression ferrites
usedwithRaymarineequipment.Alwaysusethe ferritessuppliedby
Raymarine.Thisproducthasferritesmountedinternally.
Figure 3: Typical suppression ferrites
Connections to other equipment
If your Raymarine equipment is to be connected to other equipment
usingacablenotsuppliedbyRaymarine,asuppressionferriteMUST
always be attached to the cable near tothe Raymarine unit.
D3548-2

8 Rotary Drive - Installation Guide
2. Mounting the drive
Mountingthedriveinvolvesfourmainsteps:
•securingthe driveto the boat
•connectingthe drive to thesteering system
•ensuring correctsprocket alignment and chain tension
•completing a steering check
Securing the drive
Mounting location
Before you secure the drive to your boat, you must first check the
suitability of the mounting location.
CAUTION:
Consulttheboatmanufacturerifyouhaveanydoubtaboutthe
strengthorsuitabilityofthemountinglocation.
•Structuralstrength:
•This drive produces a considerable amount of force, soyou
must mount it on a solid structure (i.e. a substantial frame
member) in the boat.In some cases you mayneed to build a
special frame to mount the drive unit.
•Topreventexcessnoiseandvibration,donot attach this drive
to any structuresthat supportcabins.
•Drive orientation:
•The drive canbe mounted on a vertical or horizontal surface.
•If necessary, you can rotate the mounting foot through 90
degreesto providea more convenientmountingposition(as
shownin Figure 7). To dothis: remove the four screws
securing the mountingfootto the drive unit, rotate the
mounting foot, then replacethe screws.
•Additionally,thedrivemayfaceeitherwayasyoucancorrect
thesteeringdirectionby reversingthe polarity of themotor
connections at the course computer (see Figure 8).
•Generalposition:
•Referto the EMCinstallationguidelines(page 6)
•Make sure the drive will be accessible for future servicing.

Rotary Drive - Installation Guide 9
•Environment:
•This drive is not waterproof, so youshould mount it in adry
location,clearofany bilge water.
Mounting bolts
Attachthemountingfoot withtwostainlesssteelM12(1/2 inch) bolts
andlocknuts/lockwashers.
Note:Before finally tighteningthe boltsyou must check sprocket
alignment(see page 12)andchaintension(seepage 12).
Note:Always mountthe drive assecurelyaspossible to make sure it
performs reliably and the chain remainscorrectly aligned.
Connecting to the steering system
The rotary drive isconnected to the steering system by achain drive
betweena sprocketonthe drive and a sprocketon theboat’ssteering
shaft.
Note:Most steeringgear manufacturers supply specialautopilot
drive attachments, andmany includethis asstandard. Contact your
steering gear manufacturerformore information.
When you have checked with the steering gear manufacturer about
how andwhere youcan attach theautopilot chainto the boat’s
steeringsystem,youneed to:
•determine the sprocketand chainsizes
•attach andalign the sprockets and chain
•tensionthe chain correctly
Determining the sprocket and chain sizes
Chain size
Recommended chainsize: standard3/8 inch pitch.
Sprocket sizes
To determine the sprocket sizes required at the steering shaft and
rotary drive:
•countthenumberoftimesthesteeringshaftturnswhenyoumove
therudderfrom hardover tohardover