I solved the breaker mystery. At least it appears so. I recently installed a new Raymarine EV1/ACU100 auto pilot, but kept my existing ST6000 pilot control and used my e7 MFD to set everything up. Running the new Seatalkng backbone to the mfd was the toughest part. The EV series are smart and self learning. One I relocated the EV1 away from my original location to right next to the ACU (they really should mention in their docs they you should not mount these two items next to each other, but that’s another story...back to the breaker). The compass deviation was at 2 degrees.
Here comes the interesting/weird part...rough the set up on the mfd I left the compass unlocked to continue learning and set the mfd to be able to control the pilot. Once we started our trip north I noticed the the pilot was being extremely active. Hunting and over and undear correcting. Then after I while is would get alarms on the mfd the the motor stalled and finally the breaker started to trip intermittently. So, since all of the DC wiring seemed solid I decided to blame the breaker. I even tried taping it closed, but it tripped anyway. So, I tried something that I did not expect to work...I shut down the mfd. the pilot calmed down and held course within 2-3 degrees, not the 6-8 it had before I shut down the mfd. My theory ins the mfd and st6000 were both sending instructions at the same time causing over correction and, when there was simultaneous conflicting instructions to the motor, circuit overloads. Since I use the mfd for sailing and the pilot only when motoring, it should work out fine. I just turned off pilot control and locked the compass in the mfd. thx for the help guys...on to Sidney for new motor mounts! Tom Buscaglia S/V Alera 1990 C&C 37+/40 Vashon WA P 206.463.9200 C 305.409.3660 > On Aug 5, 2018, at 9:00 AM, [email protected] wrote: > > Message: 2 > Date: Sun, 05 Aug 2018 08:41:59 -0700 > From: Doug Mountjoy <[email protected]> > To: [email protected] > Subject: Re: Stus-List Broken breaker? > Message-ID: <[email protected]> > Content-Type: text/plain; charset="utf-8" > > Happens, especially when said breaker is used as a switch like we do on our > boats. Circuit breakers (at least on aircraft)were never designed to be used > as a switch.? > > > Doug Mountjoy?Rebecca Leah?LF39?Port Orchard YC, WA. > > > -------- Original message --------From: Tom Buscaglia via CnC-List > <[email protected]> Date: 8/4/18 23:02 (GMT-08:00) To: > [email protected] Cc: Tom Buscaglia <[email protected]> Subject: > Stus-List Broken breaker? > Frost day puts our 3 week summer cruise, headed to the Rendezvous next > weekend..I am having an electrical issue. > Has anyone had a breaker wear out and ?not just stop working but, rather, > begin to trip at a ?lower load than their original level?
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