Raymarine 400 Manuale Utente Scaricare il pdf (Pagina 15)

Chapter 3. Wheel Drive Actuator

ST4000+ Autopilots Service Manual 83115-1 11

Chapter 3. Wheel Drive Actuator

3.1 Wheel Drive Actuator test

Carry out the passive and active tests detailed in Figure 6.

D2386-1

PSU

12V 15A

Switch

Fuse/CB

12A

Figure 5. Wheel Drive Actuator test connections

Change damaged

components

Check gears,

belt, rollers,

belt tension,

eccentric, drive

lever, motor

Start

Yes

Visually inspect unit

Rotate drive ring by hand

with clutch disengaged

Yes

Check resistance across

motor connector pins 2 and 3

is approximately 1 to 2 ohms

Change/adjust

as necessary

Yes

Check wiring

and connector

Check motor

Change as

necessary

D2390-1

Yes

Connect power supply

as in Figure 5

Yes

Change/adjust

as necessary

Switch on.Check drive ring

moves in opposite direction

to that of first test and

current is less than 2A

Yes

Actuator OK.

End of test

Switch on, and with clutch

engaged, check drive ring

moves and current is less

than 2A

Restrain drive ring rotation

until 6.5A is obtained. Check

that belt does not slip.

Yes

Reverse polarity of supply

Restrain drive ring rotation

until 6.5A is obtained. Check

that belt does not slip.

Yes

Check gears, belt,

rollers, belt

tension, eccentric,

drive lever, motor

Change/adjust

as necessary

Check gears, belt,

rollers, belt

tension, eccentric,

drive lever, motor

Figure 6. Wheel Drive Actuator test flowchart

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 33 34

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