Raymarine Autohelm 6000 User Manual

Contents

Raymarine Autohelm 6000 User Manual Manual pdf 8 page image

1.:2 DRIVE SYSTEMSMechanical steering systems may be driven byeither a rotary or linear drive unit. Some steeringsystems are fitted with an autopilot drive shaft,and in such cases the choice of a rotary drivesystem is straightforward. In general, if a driveshaft exists and lost motion does not exceed 2 %of total rudder movement, the rotary drive unitbecomes the most economic choice. In all othercases the linear drive unit will provide the simplestinstallation since it may be connected directly to atiller link on the rudder stock. Total independenceof the mechanical steering linkage also allows thelinear drive unit to be used to power steer thevessel in the event of steering linkage failure, andthis is an important safety feature. In addition,minimisation of working parts improves the overallefficiency of the rudder drive system and reduceslost motion to an absolute minimum.All vessels with hydraulicsteering systems willrequire a hydraulic drive unit.1.2.1 ROTARY DRIVE UNITThe output shaft is driven by a continuously ratedservo motor via an efficient reduction gearbox.The gearbox is dry lubricated to permit operationin any attitude. A fail safe friction clutch within thegear train engages automatically when theautopilot is switched to ‘Auto’ and will disengageinstantly even under extreme load when theautopilot is switched to ‘Stand-by’. The motor iscontrolled by the course computer which alsoregulates peak armature current and eliminatesthe need for end limit switches.Supply voltagePeak output torqueMaximum shaft speedPower consumption (typicalaverage)Overall depth ‘A’Suilable for vessels up toType 1 Type 212 volts (24 volts optional) 12 volts (24 volts optional)240lb.ir-r. (27Nm) 425lb.in. (48Nm)18 rpm 28 rpm1 Z-3 amps 4-7 amps75in. (190mm) 8.1 in. (21 Omm)45ft. LOA (14m) 60ft. LOA (18m)2 HOLES: 12.5mm (0.5”) diameter