Jefa Steering Systems LD100 - User Manual

linear drive type LD100 installation guide version 1.2 page 1 of 3
Test data and installation instructions 100 KgM
linear autopilot drive type LD100.
Test data:
Customer:__________________ Test Engineer:_______________
Date:______________________ Serial number:_______________
Output force 400 Kgs 
Motor voltage: 12 Volts  Clutch voltage: 12 Volts 
Insulation test: 
Electrical Connections:
This illustration shows the minimal compo-
nents for a working autopilot configuration.
Jefa autopilot drives work together with all
mayor autopilot electronics. The connection of
the Jefa autopilot drive to the autopilot
junction box is quite simple. The two 1,5 mm²
red and black wires must be connected to the
plus and minus of the autopilot clutch line.
This will make sure that when the autopilot
user engages the autopilot on the control
screen, the clutch will engage and allow the
autopilot motor to drive the steering system.
The two 2 mm² red and black wires must be
connected to the autopilot drive output
connection.
Performance table:
This performance table shows the relation between the consumed power and the output power and how quick
this is done (hard over time). The red line shows the output torque against the needed amperage. The green
line shows the hard over time (time to travel 72° of rudder travel) of the drive relative to the output torque. Also
visible is the strength of the drive unit related to manpower. The unit is much stronger than a human being and
can last much longer but one should note that when the unit is operated in the red zone, something is wrong
with the trim of the boats and the sails should be adjusted to achieve lower rudder torques. The above table
shows that the Jefa linear drive will steer the yacht even in the worst possible conditions. As the drive will mostly
operate in the left green zone and will not continuously rotate, the average power consumption on 12 volts is 1
to 2 amps.
fluxgate compass
2 mm2
to battery
autopilot control head
clutch
output
1,5 mm2
drive unit
rudder feedback unit
autopilot junction box
drive
output

Summary

Electrical Connections

Autopilot Configuration Wiring

Shows minimal components for a working autopilot configuration and connection to the autopilot junction box.

Performance Table

Drive Performance Analysis

Relates consumed power and output power, showing hard over time and drive strength against manpower.

Compatibility in 12 Volts

Autopilot Junction Box Compatibility

Table showing maximum rudder torque with various autopilot junction boxes in 12 Volt version.

Mechanical Installation

Installation Geometry and Mounting

Details correct installation geometry, rudder stops, and advises on motor orientation for reduced friction.

Non-Standard Rudder Angle Centers

Provides operating centers for non-standard rudder angles and their effect on maximum rudder torque.

Test the System

Pre-Test System Checks

Ensures solid rudder stops, tightened bolts, no contact with vessel parts, and protection from water.

Electronics Connection and Testing

Guides connecting electronics, setting autopilot mode, and bypassing electronics for direct drive testing.

Maintenance

Drive Unit Care and Checks

States drive is 'greased for life', requiring only periodic checks of bolted connections and exchangeable balls.

Declaration of Conformity

Jefa Steering Systems LD100 Specifications

General

Brand	Jefa Steering Systems
Model	LD100
Category	Marine Equipment
Language	English