Mente Marine ACS A Manuale utente

ACS A

Attitude Control System

User’s manual

Mente Marine

Vaasa, Finland

info@mente-marine.com

www.mente-marine.com

Contents

Introduction............................................................................................................................3

Symbols and abbreviations......................................................................................................................................3

Security....................................................................................................................................................................3

Product disposal ......................................................................................................................................................3

Theory of operation ...............................................................................................................4

Roll and pitch axes ..................................................................................................................................................4

Turning detection.....................................................................................................................................................4

Adaptive system.......................................................................................................................................................5

Off the plane ............................................................................................................................................................5

Position estimation...................................................................................................................................................5

Auto / Manual mode.................................................................................................................................................5

Installation..............................................................................................................................6

Control unit...............................................................................................................................................................6

Control Panel...........................................................................................................................................................6

Connection.............................................................................................................................6

Hydraulic trim tabs...................................................................................................................................................7

Electromechanical trim tabs.....................................................................................................................................8

Calibration..............................................................................................................................9

Verify connection.................................................................................................................10

Usage....................................................................................................................................11

Attitude setting.......................................................................................................................................................11

Fine adjustment .....................................................................................................................................................11

Adjusting gain ........................................................................................................................................................12

Retraction...............................................................................................................................................................12

Specifications.......................................................................................................................13

Troubleshooting...................................................................................................................14

Indicators ...............................................................................................................................................................14

Supply voltage .......................................................................................................................................................14

Warranty policy....................................................................................................................15

Introduction

This user’s manual describes the installation and usage of the ACS A attitude control system from

Mente Marine. It is available in print and in Pdf format at www.mente-marine.com.

Symbols and abbreviations

ACS Attitude Control System

LED Light Emitting Diode

Security

Switch off the main circuit breaker or put the ACS into manual mode before

lifting or transporting the boat. Should the automatics engage during transport,

the trim tabs may be damaged.

The control unit is protected against moisture and water spray, according to

class IP66. Do not install it in a place where it may become completely wet!

Product disposal

The WEEE Directive requires the recycling of waste

electrical and electronic

equipment.

Theory of operation

The deep-V hulls of modern pleasure boats are designed to provide you with a smooth ride in rough

water. The deeper the V, the more need for trim tabs to keep the boat levelled. A roll or sideward’s

inclination is dependent on the wind and passenger location. The longitudinal inclination, also called the

trim angle, depends on the speed and loading. When the course is changed, winds change direction and

you need to trim the boat. When passengers move, trim again. This need, to constantly adjust the trim

tabs, takes the driver’s attention, which can even be a safety risk during high-speed operations.

ACS takes care of the work for you. When changing course, winds shift, or passengers move, the

attitude of the boat is automatically corrected by adjusting the trim tabs.

Roll and pitch axes

ACS A automatically adjusts the boat to

the optimum attitude in the roll axis,

eliminating heeling.

ACS A automatically adjusts the boat to the optimum

attitude in the pitch axis, improving visibility and also

enabling speeds in the “semi-planing” range. It also

improves the “hole shot”.

Turning detection

While making a turn, the boat leans inwards. Thanks to the built-in gyros, the system is able to detect

heading changes and prevent automatic corrections while turning. Unnecessary adjusting is avoided

and the boat exits the turn with the optimum attitude.

The AUTO indicator blinks while making the turn to indicate that the ACS is blocked and not active at

that moment.

Once set up on a steady course again, the ACS continues measuring and correcting the attitude, taking

the altered conditions into account.

Adaptive system

ACS adapts to boats over the whole range. Thanks to the adaptive functionality, the boat is set up to the

optimum running attitude, taking into account differences in size and trim tab performance.

It also adapts to varying sea conditions. In calm seas, a list condition is corrected faster than in rough

seas. This allows a quick reaction when needed and avoids unnecessary operations that could amplify a

roll in high waves.

Off the plane

When slowing down, below planing speed, trim tabs lose their effect. ACS is aware of this and does not

attempt to control the attitude while off the plane. When accelerating, the ACS automatically starts up,

correcting the attitude back to that which is desired, even before the boat “breaks over” and reaches

the cruising speed.

The AUTO indicator blinks while off the plane. The blinking indicates that the automatic operation is

activated, but suspended for the time being because of the slow speed.

Position estimation

ACS shows the trim tab position estimation by lighting an indicator LED for each trim tab. When a tab is

extended, the lit up indicator LED moves downwards. No additional sensors are needed and ACS shows

the trim tab position estimation for all types of trim tabs after calibration.

Light sensor (Optimum visibility day and night)

Auto button with indicator (Auto / Manual mode)

4 x buttons for manual control of the trim tabs

LED indicator bars for trim tab position

LED indicator bar for gain setting

Auto / Manual mode

The Auto button is used to select the mode of the ACS. Briefly pressing the auto button causes the ACS

to switch between the manual and automatic mode. In the manual mode, the buttons can be used to

control the attitude of the boat manually.

In the automatic mode, the attitude of the boat is controlled automatically when the indicator is lit up.

If it is blinking, automatic operation is suspended while the boat is turning sharply or when it is off the

plane.

Installation

Control unit

The control unit should be mounted in an upright

position. The label on the front side is marked with

an UP arrow that should point upwards and a FWD

arrow that should point in the forward direction.

Exact mounting is not critical, however, as the

desired running attitude is set after installation.

The control unit may be installed anywhere in the

boat where the high current cables from the trim

tabs are easily accessible. It should, however, not be

immersed in water.

If there is no wall aligned fore to aft, on which the

box can be mounted directly, use the mounting

bracket. The mounting bracket has four sets of screw

holes. One set for use when the bracket is floor

mounted, another when roof mounted and two sets

when wall mounted.

Control Panel

Choose a location close to the helm, where the control panel is easy to access and drill holes for the

screws and connectors using the enclosed drill pattern. In retrofit installations, remove the old panel

and use the new panel to cover the hole.

Connection

IMPORTANT! In retrofit installations, disconnect the wires from the old control panel before connecting

the ACS. It should not be connected in parallel with the old panel. Switch off the main circuit breaker

before starting the connection!

Connect the red wire to the boat’s main circuit breaker through a fuse. Connect the black wire to the

battery's negative (-) terminal. Minimum 2.5 mm2 (14 AWG) is recommended.

The red wire from the control panel is connected to the ignition key run position. No current is drawn

from that wire, it is just a start and retract signal for the ACS.

max. 8°

FWD

Hydraulic trim tabs

Hydraulic trim tabs, such as Bennett, Instatrim, QL and Trimmaster use a hydraulic pump unit to extend

and retract the actuators. The pump unit is situated in the rear of the boat and connected to the

battery's negative (-) terminal. From the pump unit, a wire harness is routed to the ACS. Connect the

wires to the ACS terminals 3, 4, 5, 6, according to the figure that follows. Terminals 5 and 6 are

connected to the pump’s motor and terminals 3 and 4 to the valves controlling the trim tabs.

The table below shows the colours used by the major manufacturers of hydraulic trim tabs.

Corresponding ACS markings are shown in the left column.

ACS

marking

Instatrim

(QL)

Bennett Trim-

master

3 White Green White

4 Green Red Green

5 Yellow Yellow Yellow

6 Red Blue Red

Yellow -> 7

Green -> 8

Brown -> 9

White -> 10

Electromechanical trim tabs

Connect the starboard actuator to terminals 4 and 6 and the port actuator to terminals 3 and 5,

according to the figure that follows. Verify the connection later on and change it if necessary.

ACS

marking

Lenco Lectrotab Ultraflex

3 Black (port) White (port) Black (port)

4 Black (stbd) White (stbd) Black (stbd)

5 White (port) Black (port) White (port)

6 White (stbd) Black (stbd) White (stbd)

Yellow -> 7

Green -> 8

Brown -> 9

White -> 10

Calibration

For the ACS to operate properly, it needs to know the trim tab type, position, and current consumption.

This information is automatically acquired and stored in memory during calibration. Before you start,

ensure that no obstacles hinder the free run of the tabs.

The AUTO indicator blinks to indicate that

calibration is needed. Press the uppermost

and lowermost buttons simultaneously for 4

s to start the calibration. Keep the buttons

depressed for another 8 s, while the ACS is

calibrating.

The ACS will now run the trim tabs to their

uppermost position. The tabs are then run

downwards and back up again.

This calibration may take up to 60 seconds and should not be interrupted. After completion, the

indicator LED’s stop blinking. The port trim tab position is now shown by the left bar and the starboard

by the right bar.

Verify connection

IMPORTANT! After calibration, verify the connection by pressing the buttons one by one and observing

the trim tabs. Check the actual movement of the tabs at the transom. For the automatics to work

properly, the trim tabs have to move in the correct direction when controlling them manually.

he uppermost button

controls both tabs down-

wards.

he lowermost button

controls both tabs up-

wards.

Should the trim tabs move in the wrong direction: For hydraulic trim tabs, exchange the 5 and 6 wires,

for electromechanical trim tabs, reverse the wires of the actuator(s) that move in the wrong direction.

The port button controls

the port tab upwards first

and then the starboard tab

downwards.

The starboard button

controls the starboard tab

upwards first and then the

port tab downwards.

Should the trim tabs move in the wrong direction: For hydraulic trim tabs, exchange the 3 and 4 wires,

for electromechanical trim tabs, exchange the 3 and 5 wires with the 4 and 6 wires.

Indice

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