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48 STEP PER DEGREE 

RETRANSMISSION UNIT KW948 

AMI – GFV MARINE 

Summary of Contents for KW948

Page 1: ...48 STEP PER DEGREE RETRANSMISSION UNIT KW948 AMI GFV MARINE ...

Page 2: ... in this document AMI GFV MARINE LTD Parham Drive Eastleigh Southampton SO50 4NU UK Telephone 44 0 2380 480450 Fax 44 0 2380 480451 Email sales amimarine net Web www amimarine net Design and manufacture at ADITEL Cefn Laboratories Abergavenny UK Telephone 44 0 1873 840405 Email af v d r net Web www aditel org uk www v d r net DESIGNER and AUTHOR Andrew Fairgrieve 08 03 06 ...

Page 3: ...l valid heading sentences 4800 baud One or more decimal places are accepted OUTPUT 6 pin lift off connector block 24 volts DC for illumination Drive for 2 pole stepper motors with two separate windings Maximum current 6 Amps total hold current approximately 0 5 amps A version for 96 steps per degree is available Rotation follow up rate 5 or 10 degrees per second Adjustable by jumper With an input ...

Page 4: ...o the gyro s output then the gyro is not sending NMEA 0183 heading data REPEATERS The KW948 has one output to be connected to the existing gyro repeater distribution box For first tests do not connect the repeaters Note that the connectors lift off BUT never lift off with power connected The repeaters have two windings which connect to S1 S2 and S3 S4 FIRST TESTS LD3 24v indicator on LD4 status LE...

Page 5: ... there is no problem TESTING THAT REPEATERS FOLLOW Move heading input If the repeaters move the wrong way switch off reverse one pair of wires S1 S2 Switch on and try again The repeaters will eventually have to be aligned to true heading but for initial tests this is not necessary Move heading and hold it Check that all the repeaters have followed successfully Do the exercise as fast as possible T...

Page 6: ...M PRESET LOCTIONS This table is for reference but may easily be used by AMI s expert dealers to program eproms If anyone wants a perfect solution for a particular repeater send it to me and I will do the necessary adjustments Location 55 hex 56 hex 57 hex 58 hex Description PWM pulse width when stopped x 0 25 mS PWM width x 0 25 mS Follow up rate per step x 0 25 mS Step drive width during turning ...

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