Microshift provides the simple, safe and reliable means for bridge controlling vessels with fixes pitch propellers and reversing gearboxes.
ENGINE SPEED CONTROL VIA 0-10v, 0-20mA or 0-1 AMP SIGNAL AND SWITCH VOLTAGE TO SOLENOID OPERATED CLUTCHES.
Microshift is a proven control system module that provides sequential control and safety interlock for the engine speed and gearbox clutches. Module type AG6324/M provides a mechanical control interface for both the engine speed setting and clutch control. With this mechanical option, emergency manual control is provided via the levers on the outside of the unit. Vessels that require either the engine speed setting or the clutch control to be electric, are catered for by the AG6324/M2 unit. Up to 4 independent control stations can be connected with pre-programmed control station transfer options, which are switch selectable during commissioning.
MICROSHIFT ACTUATOR - MECHANICAL DESIGN
The mechanical motion to control engine speed and gearbox clutches is derived from a precision lead screw that is driven direct from a high quality stepper motor. This elegant solution avoids the need for reduction gearboxes and also allows the actuator to be back driven with the power off, thus providing a convenient emergency manual control facility which is a requirement of Surveying Societes.
MICROSHIFT BRIDGE CONTROL LOGIC FEATURES FOR AG6324/M & AG6324/M2 SYSTEM SAFETY
Engine start inhibit unless is “on” and clutch actuator is set to neutral
Engine revs increased during clutch engagement
Variable delay on opposite direction manoeuvres
System self diagnostic 12 status LED’s
Volt free output to operate ships alarm system
SYSTEM SELECTION SWITCHES
Direction of speed setting actuator
Clutch engage speed boost time
Direction for clutch setting actuator
Clutch actuator travel
Sequence for Station-In-Control transfer
Opposite direction delay with clutch held engaged or set to neutral
Clutch engagement speed boost
Speed setting actuator stroke
Sets rate for engine speed increase
Opposite direction manoeuvre delay ramp
ADDITIONAL FEATURES AVAILABLE WITH THE AG6324/M2 UNIT (this card has all the features of the basic card and the following additional features)
Current or voltage output for electronic governor control
Switched output for solenoid operated clutches
Voltage output to operate trolling valve logic, which is sequenced with gearbox clutches and engine speed control.
Facility to inhibit opposite direction manoeuvres interlocked from propeller shaft speed switches