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Motor controller voltage drop
#1
I installed Sean's Tinypilot and motor controller along with Garmin/Jeffa Linear driver with builtin rudder sense 2 years ago and it works great.

This year I have had a few cases where upon powerup of the 12V master supply something happens and the 12V rail is limited to around 4V.  I have a small panel with digital voltage display on the circuit dedicated to the Pypilot so see this immediately.

I did some basic fault finding by disconnecting the components in turn and narrowed it down to a dicky connection between the motor controller and the drive.  Disconnecting and reconnecting the pins (soldered onto wires from the  motor controller output & clutch controller) into the linear drive socket and the fault went away.  Sometime later it came back then disappeared again. I have added some additional strain relief cable clamps either side of the connection and it seems good/better now.

I am puzzled at how a faulty connection between the controller + motor and clutch could cause such a big voltage drop at the supply board and not blow the 10amp fuse on the supply input on the motor controller.  There is about 15 feet of the 12V supply cable from my chart table supply (where Tinypilot is located) and the motor controller but the wire resistance should be negligible. All the connections look good. 

I am also concerned I may have damaged something in the motor controller.

Does anyone have any idea what may be happening here?

Thanks
Andrew
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Messages In This Thread
Motor controller voltage drop - by andrewAB - 2023-07-04, 12:18 AM
RE: Motor controller voltage drop - by andrewAB - 2023-07-11, 02:21 AM
RE: Motor controller voltage drop - by andrewAB - 2023-07-18, 10:42 PM
RE: Motor controller voltage drop - by andrewAB - 2023-09-01, 09:53 AM

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