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Pypilot working on my Nicholson 44
#31
The clutch output can supply 1-2 amps (maybe 3) just fine. Does your clutch use significantly more that you need a relay?
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#32
(2020-07-02, 05:53 PM)seandepagnier Wrote: The clutch output can supply 1-2 amps (maybe 3) just fine.   Does your clutch use significantly more that you need a relay?

Sean ==>  Again, my big boat (42 ft Solaris cat)_to which this all applies, is enroute from St John, USVI to the States as we speak.   My intention is to have all ready to install the new autopilot and OpenPlotter RPI all-in-one nav computer when it arrives in a month or so.

All in all, I think that having the Motor Controller operate relays or SSRs may ensure that the cumulative load on the Motor Controller is limited to driving low amperage loads.   Just seems more reasonable - allowing smaller gauge control wiring to a relay box at the Neco (which sits just above (8 inches) the battery banks. 

Once the boa is here and I am knee deep in details, I'll check back with you.

Thanks for your help and all else you do,

Kip
Kip Hansen
S/V Golden Dawn
S/V Merlin
kip@i4.net

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#33
Using relays has advantages, but the disadvantage:

1) no speed control, no way to make the movements of the motor smooth with soft start/stop
2) more power consumption
3) eventually wear out if mechanical relays.
4) no current feedback to prevent stalls. You will have to use end of travel switches or rudder feedback.

Otherwise, it should be ok to use relays if you accept the tradeoffs.
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