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Manual
Simrad DD15
Direct Drive
English
www.simrad-yachting.com
A brand by Navico - Leader in Marine Electronics
www.busse-yachtshop.de | info@busse-yachtshop.de

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Summary of Contents for Simrad DD15

  • Page 1 Manual Simrad DD15 Direct Drive English www.simrad-yachting.com A brand by Navico - Leader in Marine Electronics www.busse-yachtshop.de | info@busse-yachtshop.de...
  • Page 2 MANUAL SIMRAD DD15 Direct Drive 20222303A English www.busse-yachtshop.de | info@busse-yachtshop.de...
  • Page 3 Simrad AS. The information contained in this document is subject to change without prior notice. Simrad AS shall not be liable for errors contained herein, or for incidental or consequential damages in connection with the furnishing, performance, or use of this document.
  • Page 4 Introduction Contents SYSTEM DESCRIPTION ..........5 1.1 General ....................5 1.2 How to use this manual................. 6 1.3 Performance ..................7 1.4 Compatibility in 12 Volts..............8 CONSTRUCTION ............9 2.1 Electric Motor ..................9 2.2 Planetary gearbox.................. 9 2.3 Electro magnetic clutch............... 10 INSTALLATION............11 3.1 Mechanical mounting................
  • Page 5 Simrad DD15 Direct Drive This page is intentionally left blank 20222303 / A www.busse-yachtshop.de | info@busse-yachtshop.de...
  • Page 6: System Description

    System description SYSTEM DESCRIPTION General The DD15 Direct Drive is a very strong and compact autopilot drive and more efficient than hydraulic and most electro- mechanical autopilot drive units. It is powerful (the max. output torque of 150 Kgm is equivalent to 150 Kg force on the end of a 1 meter steering tiller) and is build for 24 hours per day continuous operation with a total weight of only 12 Kgs.
  • Page 7: How To Use This Manual

    How to use this manual This manual is intended as a reference guide for correctly installing the Simrad DD15 Direct Drive. Please take time to read the manual to get a thorough understanding of the use of the drive and the connection to an autopilot system.
  • Page 8: Performance

    The below table shows that the Simrad direct drive will steer the yacht even in the worst possible conditions.
  • Page 9: Compatibility In 12 Volts

    Compatibility in 12 Volts The following table shows the maximum rudder torques at amidships and full rudder that can be achieved with the Simrad direct drive in combination with the autopilot computer. The hard over time (HO-time) states the time it takes the drive to travel the full 72 degrees of rudder travel when the speed control of the autopilot is set to maximum speed.
  • Page 10: Construction

    Some autopilot drive producers use a worm reduction box, but the efficiency is extremely low as the gears rub each other. The Simrad direct drive uses a combination of a planetary gearbox and spur gear sets (one small gear and one big gear). The...
  • Page 11: Electro Magnetic Clutch

    Simrad DD15 Direct Drive • The highest possible efficiency compared to any other gearbox. • All forces are equally spread over 3 gear teeth in stead of one allowing a much compacter and stronger solution. • The forces and torques from the motor to the output shaft...
  • Page 12: Installation

    Installation INSTALLATION Mechanical mounting The direct drive drives the rudder via a draglink to the existing tiller lever or quadrant or via a separate tiller lever. The length of the draglink and a separate tiller lever (if necessary) have to be specified when ordering.
  • Page 13: Reducing Noise And Vibrations

    Simrad DD15 Direct Drive A good installation check is to make sure that all end position points for the output lever and the tiller lever are in one line. Figure 3-2 Travel of tiller lever and output lever Reducing noise and vibrations The vibrations from the autopilot drive motor and gears are often amplified multiple times by the deck or hull.
  • Page 14: Feedback Unit Mounting

    Installation Feedback unit mounting Attached to the direct drive is a mounting bracket for the rudder feedback unit. The feedback unit and transmission link with mounting screws are supplied with the direct drive. - Set the rudder to amidships position. - Clamp the feedback bracket to the direct drive with a 90°...
  • Page 15 Simrad DD15 Direct Drive Examples of DD15 Mounting 20222303 / A www.busse-yachtshop.de | info@busse-yachtshop.de...
  • Page 16: Direct Drive In Combination With Rack And Pinion System

    Installation Direct drive in combination with rack and pinion system In principle the installation in combination with a rack and pinion system is the same as the standard installation except for the fact that the complete setup is rotated with the steering offset angle β.
  • Page 17 Simrad DD15 Direct Drive offset Figure 3-6 Drive unit in combination with rack and pinion system – top view 20222303 / A www.busse-yachtshop.de | info@busse-yachtshop.de...
  • Page 18: Direct Drive In Front Of Pedestal

    Installation Direct drive in front of pedestal When sufficient space around the rudder shaft isn’t available, the direct drive can be setup to drive the rudder via the pedestal. An extra extended output lever with 165 mm centers can be fitted to the pedestal down-shaft to be driven by the direct drive.
  • Page 19: Electrical Connections

    Simrad DD15 Direct Drive Electrical connections The connection of the Simrad direct drive to the autopilot computer is quite simple. The two 0.75 mm² red and black wires for the clutch have to be connected to the plus and minus of the autopilot clutch Drive Engage terminals.
  • Page 20: Test The System

    Installation Test the system Before you can test the system, make sure following things are correct: • Solid rudder stops should be fitted limiting the rudder travel to an equal travel of 36 degrees from amidships to port and starboard. •...
  • Page 21: Maintenance

    Simrad DD15 Direct Drive MAINTENANCE The direct drive is “greased for life”, so it should not be opened. No maintenance is required except for periodic checks of all bolted connections. As the rudder system, the steering system and the autopilot drive are exposed to heavy vibrations (mainly by cruising on motor), all bolted connections should be yearly checked.
  • Page 22: Technical Specifications

    Clutch voltage: ................ 12V Average power consumption: ........... 2 Amps Output torque: ..............150 Kgm 345 [13.5] 321 [12.5] 164 [6.4] 140 [5.5] 10 [0.4] 77 [3] 177 [6.9] Figure 5-1 DD15 Dimensional drawing 20222303 / A www.busse-yachtshop.de | info@busse-yachtshop.de...
  • Page 23: Draglinks

    Simrad DD15 Direct Drive Figure 5-2 Rudder feedback bracket - Dimensions Draglinks 44172088 Draglink DL3040 (300 [11,8”] - 400 [15,7”] mm) 44172096 Draglink DL2030 (200 [7,9”] - 300 [11,8”] mm) 44172104 Draglink DL4050 (400 [15,7”] - 500 [19,7”] mm) Spare Parts...
  • Page 24 Technical Specifications DIRECT DRIVE SPECIFICATION FORM Version 1.2 Direct drive type I operating locking rudder bolt centres in mm valid for 72° shaft (2x36°) rudder travel. direct output offset tiller drive centers centers distance output offset lever tiller (standard) center specify draglink lenght output (please cross the appropriate box)
  • Page 25 Simrad DD15 Direct Drive 20222303 / A www.busse-yachtshop.de | info@busse-yachtshop.de...
  • Page 26 www.busse-yachtshop.de | info@busse-yachtshop.de...

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