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' Autohelm Raymarine: Linear Drive St6000 Linear Drive'

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Any reference to Raytheon or
RTN in this manual should be
interpreted as names Raytheon and RTN
are owned by the
Raytheon Guide
Drives Type 1 Linear Drive 12 V
M81131 Type 2 short Linear Drive 12 V
M81132 Type 2 long Linear Drive 12 V
M81133 Type 2 short Linear Drive 24 V
M81134 Type 2 long Linear Drive 24 number 811753
March 2001
2 Linear Drive Installation information
Safety notices
WARNING Product installation
This equipment must be installed and operated in accordance
with the instructions contained in this handbook Failure to do so
could result in poor product performance personal injury and
or damage to your boat
Because correct performance of the boats steering is critical for
safety we STRONGLY RECOMMEND that an Authorized
Raymarine Service fits this product
WARNING Navigation aid
Although we have designed this product to be accurate and
reliable many factors can affect its performance As a result it
should only be used as an aid to navigation and should never
replace commonsense and navigational judgement Always
maintain a permanent watch so you can respond to situations as
they develop
EMC conformance
All Raymarine equipment and accessories are designed to the best
industry standards for use in the recreational marine environment
The design and manufacture of Raymarine equipment and
accessories conform to the appropriate Compatibility EMC standards but correct installation is required to
ensure that performance is not Handbook information
To the best of our knowledge the information in this handbook was
correct when it went to press However Raymarine cannot accept
liability for any inaccuracies or omissions it may contain In addition
our policy of continuous product improvement may change
without notice As a result Raymarine cannot accept
liability for any differences between the product and the handbook
Raymarine Ltd 2001
Linear Drive Installation Guide Product description
Welcome to the installation guide for the Raymarine linear drive
This product is intended to operate the boats steering mechanism as
part of a Raymarine autopilot system It is designed for boats with
existing mechanical steering systems
This drive moves the rudder directly from the tiller arm or
rudder quadrant Before installing the drive check that the
boats steering system can be backdriven from the rudder
The outstanding design of the Raymarine linear drive unit provides
powerful thrust fast hardover times and quiet operation
low backdrive force to minimize the drives effect on the boats
steering when the autopilot is in standby
a powerful electric motor controlled by an fail
safe clutch using a high tensile belt drive and epicyclic gearbox
high performance for minimum current consumption
Clutch cable
Push rod Rod end
Motor cables
Motor gearbox and
Mounting foot
clutch assembly
Figure 1 Main parts of the linear drive
This guide contains
1 Product page 4
2 Installation instructions page 5
3 Maintenance information page 14
4 Linear Drive Installation Drive Table 1 Drive Performance Type
1 T1 Type 2 short Type 2 long
at nominal voltage M81130 12 V T2S T2L
M81131 12 V M81132 12 V
M81133 24 V M81134 24 V
Maximum boat displacement 10000 kg 15000 kg 20000 kg
22000 lb 33000 lb 44000 lb
Peak thrust 295 kg 480 kg 480 kg
650 lb 1050 lb 1050 lb
Maximum stroke 300 mm 300 mm 400 mm
12 in 12 in 16 in
Hardover to hardover time 11 sec 11 sec 14 sec
35 no load
Maximum rudder torque 735 Nm 1190 Nm 1660 Nm
6500 lbin 10500 lbin 14700 lbin
Power consumption 1836 W 4872 W 12 V
typical average 6696W 24 V
Other information applies to Types 1 and 2 shortlong
protected for use in engine CE approvals conforms to
89336EC EMC EN609451997
9425EC RCD Drive Installation Guide 5
Drive dimensions
A 197 mm 78 in
50 mm 2 in
79 mm 31 in
114 mm 45 in
Drive Dimension A
4 fixing holes suitable Type 1 700 mm 275 in
for 10 mm 04 in bolts Type 2 short 700 mm 275 in
Type 2 long 850 mm 335 in D50811
Figure 2 Linear drive instructions
Parts required
To install this drive you will need
Parts supplied
linear drive
mounting foot assembly consisting of foot pivot pin washer
x2 Rclip x2
tiller pin assembly see Figure 6 consisting of tiller pin
Rclip top washer lock washer nut 12 inch UNC nylock
Additional parts
suitable securing bolts and lock nutslock washers see
page 10
suitable cable and electrical connectors for the drive motor
and clutch see page 12
Note Make sure you have obtained these additional parts before you
start Linear Drive Installation Guide
Installation steps
WARNING Electrical safety
Make sure you have switched off the power supply before you
start installing this product
Follow these steps to install your linear drive unit
1 Consult the EMC installation guidelines page 6
2 Mount the drive page 8
3 Connect to the course computer page 12
4 Complete the check page 14
1 EMC installation guidelines
All Raymarine equipment and accessories are designed to the best
industry standards for use in the recreational marine environment
Their design and manufacture conforms to the appropriate
Compatibility EMC standards but correct
installation is required to ensure that performance is not
compromised Although every effort has been taken to ensure that
they will perform under all conditions it is important to understand
what factors could affect the operation of the product
The guidelines given here describe the conditions for optimum EMC
performance but it is recognized that it may not be possible to meet
all of these conditions in all situations To ensure the best possible
conditions for EMC performance within the constraints imposed by
any location always ensure the maximum separation possible
between different items of electrical equipment
For optimum EMC performance it is recommended that wherever
Raymarine equipment and cables connected to it are
Linear Drive Installation Guide 7
At least 3 ft 1 m from any equipment transmitting or cables
carrying radio signals eg VHF radios cables and antennas
In the case of SSB radios the distance should be increased to
7 ft 2 m
More than 7 ft 2 m from the path of a radar beam A radar
beam can normally be assumed to spread 20 degrees above
and below the radiating element
The equipment is supplied from a separate battery from that used
for engine start Voltage drops below 10 V and starter motor
transients can cause the equipment to reset This will not damage
the equipment but may cause the loss of some information and
may change the operating mode
Raymarine specified cables are used Cutting and rejoining these
cables can compromise EMC performance and must be avoided
unless doing so is detailed in the installation manual
If a suppression ferrite is attached to a cable this ferrite should not
be removed If the ferrite needs to be removed during installation
it must be reassembled in the same position
Suppression ferrites
The following illustration shows typical cable suppression ferrites
used with Raymarine equipment Always use the ferrites supplied by
Raymarine This product has ferrites mounted D35482
Figure 3 Typical suppression ferrites
Connections to other equipment
If your Raymarine equipment is to be connected to other equipment
using a cable not supplied by Raymarine a suppression ferrite MUST
always be attached to the cable near to the Raymarine unit
8 Linear Drive Installation Guide
2 Mounting the drive
Mounting the drive unit involves four main steps
ensuring correct drive alignment
securing the drive to the boat
connecting the drive to the steering system
completing a steering check
Drive alignment
When mounting the linear drive unit check that it is aligned
The main drive assembly must be at right angles to the mounting
surface see Figure 4
The drive unit must be at right angles to the tiller arm when the
rudder is amidships see Figure 4
A mid stroke
Side view
Drive A mid stroke B tiller arm radius
Type 1 700 mm 275 in 250 mm 10 in
Type 2 short 700 mm 275 in 250 mm 10 in
Type 2 long 850 mm 335 in 355 mm 14 in
Top view
B tiller arm
Figure 4 Drive unit alignment
The push rod must be accurately aligned with the tiller arm plane
of rotation The ball end fitting only allows up to 5 degrees
misalignment between the push rod and tiller arm plane of
rotation see Figure 5
Accurate angular alignment is extremely important You must
not exceed this 5 degree limit under any Drive Installation Guide 9
5 Max
5 Max
Figure 5 Alignment between push rod and tiller arm plane of rotation
Securing the drive
Mounting location
Before you secure the drive to your boat you must first check the
suitability of the mounting location
Consult the boat manufacturer if you have any doubt about the
strength or suitability of the mounting location
Structural strength
This drive produces a considerable amount of force so you
must mount it on a solid structure ie a substantial frame
member in the boat In some cases you may need to build a
special frame to mount the drive unit
To prevent excess noise and vibration do not attach this drive
to any structures that support cabins
Drive orientation
You can attach the drive unit mounting foot to any suitable
horizontal or vertical surface If required you can also mount
the drive unit upside down
General position
Refer to the EMC installation guidelines page 6
Make sure the drive will be accessible for future servicing
This drive is not waterproof so you should mount it in a dry
location clear of any bilge water
10 Linear Drive Installation Guide
Securing bolts
Attach the mounting foot with four stainless steel M10 38 inch bolts
and lock nutslock washers
Note Always mount the drive as securely as possible to make sure it
performs reliably and remains correctly aligned
Connecting to the steering system
Consult the steering gear manufacturer if you have any doubt
about the strength of the existing tiller arm or rudder quadrant
This drive produces a considerable amount of force so you must
ensure that your tiller arm or rudder quadrant can cope with the peak
thrust specified in the Table 1 Drive Use one of these methods to attach the push rod to the rudder stock
1 Independent tiller arm we recommend that you attach the
linear drive unit to the rudder stock via an independent tiller arm
the Edson and Whitlock companies offer standard fittings for
their steering systems
2 Steering linkage tiller arm or rudder quadrant in certain
cases you may be able to attach the push rod to the same tiller arm
or rudder quadrant used by the main steering linkage Consult the
steering manufacturer before you modify the rudder quadrant
Attaching the rod end
Use the supplied tiller pin assembly to attach the rod end to the tiller
arm at the tiller arm radius shown in Figure 4
1 Attach the tiller pin to the tiller arm
insert the tiller pin through the tiller arm hole so the flange
remains above the arm see Figure 6
make sure that the tiller pin is a tight fit in the tiller arm
use the supplied lock washer and fully tighten the lock nut
Note If necessary you will need to drill a 13 mm 052 in hole in the
tiller arm at the radius shown in Figure 4
2 Attach the rod end to the tiller pin
place the rod end onto the tiller pin
secure with the supplied washer and Rclip see Figure 6
Linear Drive Installation Guide 11
Rod end
Tiller arm
Lock Lock nut
Tiller pin
Hole diameter
13 mm 052 in
Figure 6 Attaching the push rod to the tiller arm
Steering check
When you have mounted the drive unit turn the boats steering wheel
from hardover to hardover and check that
Angular movement of the ball end fitting is less than 5 degrees
see Figure 5 If you exceed this 5 degree limit the drive will
catch on the tiller armrudder quadrant and the ball joint will bind
No part of the drive unit fouls the boats structure when the push
rod moves in and out
The total rudder movement is limited to 35 degrees by the
steering system end stops rather than the linear drives end limits
see Figure 7
Steering system Steering system
end stop end stop
35 35
Figure 7 Total rudder movement
Make sure rudder movement is limited by the steering system
end stops before the push rod reaches its end stop Failure to do
this could damage the drive and will invalidate the warranty
12 Linear Drive Installation Guide
Keep clear of moving steering systems at all times Protect
moving parts from access during normal use
3 Connecting to the course computer
WARNING Electrical safety
Make sure the power supply is switched off before you make any
electrical connections
The linear drive unit has electrical connections for
the drive motor two singlecore cables red and black
the clutch a twocore cable with red and blue cores
Follow these steps to connect the linear drive to the course computer
1 Measure the distance of cable run from the drive unit to the course
use Table 2 to identify the appropriate motor cable size
use at least 15 mm2 16 AWG copper cable for the clutch
2 Join these cables to the drive cables using appropriate electrical
connectors or junction boxes at the correct power rating
3 Route the cables back to the course computer taking into account
the EMC installation guidelines see page 6
4 Connect the cables to the course computer see Figure 8
CLUTCH cable red core to ve blue core to ve
MOTOR cables at this stage you can connect either motor
cable to either terminal You will check these connections
after installing the rest of the autopilot Drive Installation Guide 13
A B 1 2
Type 150400 course computer Type 100300 course computer
Figure 8 Cable connections at course computer
Table 2 Recommended cable sizes
Cable length Cable gauge Copper area
drive unit to course computer AWG mm2
Type 1 drive
up to 3m 10ft 14 25
up to 5m 16ft 12 4
up to 7m 23ft 10 6
up to 10m 32ft 8 10
up to 16m 52ft 6 16
Type 2 drive 12 V shortlong
up to 5m 16ft 10 6
up to 7m 23ft 8 10
up to 16m 52ft 6 16
Type 2 drive 24 V shortlong
up to 3m 10ft 12 4
up to 5m 16ft 10 6
up to 10m 32ft 8 10
up to 16m 52ft 6 16
14 Linear Drive Installation Guide
4 Post installation checklist
Check the following points after installing the drive
1 Is the mounting foot secured to a substantial structure on the boat
2 Is the drive unit correctly aligned ie
Is the mounting foot correctly oriented
Is the drive mounted at right angles to the tiller arm in a mid
stroke position when the rudder is amidships
Is the push rod accurately aligned with the tiller arm plane of
rotation less than 5 degrees variation
3 Is the linear drive rod end
securely attached to the tiller arm or quadrant
attached at the recommended tiller arm radius for the boat
4 Are the motor and clutch cables correctly routed and securely
connected to the course computer
5 Have you completed a handsteering check see page 11
Note When you have installed the entire autopilot system you will
need to complete an autopilot steering check Refer to the control unit
handbook for more On a regular basis
check all connections and mountings are secure
check drive alignment
check cables for signs of wear or damage
Note If this drive is used heavily we recommend that it is serviced
every two years by a Raymarine Authorized Service EMC servicing and safety guidelines
Raymarine equipment should be serviced only by authorized
Raymarine service technicians They will ensure that service
procedures and replacement parts used will not affect
performance There are no user serviceable parts in any
Raymarine product
Some products generate high voltages so never handle the
when power is being supplied to the
Drive Installation Guide 15
When powered up all electrical equipment produces
fields These can cause adjacent pieces of
electrical equipment to interact with one another with a
consequent adverse effect on operation In order to minimize
these effects and enable you to get the best possible performance
from your Raymarine equipment guidelines are given in the
installation instructions to enable you to ensure minimum
interaction between different items of equipment ie ensure
optimum Compatibility EMC
Always report any EMCrelated problem to your nearest
Raymarine dealer We use such information to improve our
quality standards
In some it may not be possible to prevent the
equipment from being affected by external influences In general
this will not damage the equipment but it can lead to spurious
resetting action or momentarily may result in faulty operation
Product support
Raymarine products are supported by a worldwide network of
distributors and Authorized Service If you encounter any difficulties with this product please contact
either your national distributor or your service or the
Raymarine Technical Services Call Center Refer to the back cover
or the Worldwide Distributor List for contact details
16 Linear Drive Installation Ltd Raymarine Inc
Anchorage Park 22 Cotton Road Suite Hampshire PO3 5TD NH 030634219 USA
Telephone 44 023 9269 3611 Telephone 1 603 881 5200
Fax 44 023 9269 4642 Fax 1 603 864 Technical Services Call Center
UK 44 023 9271 4713 or USA 1 603 881 5200 or
44 023 9269 3611 ext 1083 ext 2333

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