syncofs is the one you're looking for. The other is not relevant for resolver operation.
Leaf motors usually run fine at syncofs=0 and can be optimized by tuning.
EM57 Resolver connection, need help
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Re: EM57 Resolver connection, need help
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Re: EM57 Resolver connection, need help
UPDATE:
I managed to tune the engine.
It spins forward and backward, accelerates, and stops.
Thanks to everyone who responded.
I apologize for my rambling questions and lack of attention.
I managed to tune the engine.
It spins forward and backward, accelerates, and stops.
Thanks to everyone who responded.
I apologize for my rambling questions and lack of attention.
-
Jacobsmess
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Re: EM57 Resolver connection, need help
What was the issue? It's always helpful to publicly document this to help others with similar issues.
Re: EM57 Resolver connection, need help
I couldn't find a tutorial video or a setup article on the wiki until MANNY let me know.Jacobsmess wrote: ↑Wed Oct 22, 2025 4:03 pm What was the issue? It's always helpful to publicly document this to help others with similar issues.
The main reason I couldn't set up the resolver for so long was because I thought the S1, S2, S3, and S3 pins on the board corresponded to the same pins on the resolver. If there was a discrepancy, it meant I'd made a mistake in the installation. I triple-checked.
The second reason I couldn't figure it out for so long was that the valid resolver graph in the tutorial video didn't look like the graph I had. They were quite different.
And the third reason was that I tried using other people's ready-made firmware. They had very strange SINCOSOFS values, the sine and cosine midpoint offset values. And with these firmware, nothing worked at all, no matter what resolver combination I used.
I tried to extend all this on 5.05, 5.24 and 535 versions.
Re: EM57 Resolver connection, need help
Hello, friends!
spring has come, the ice has melted from the river, installation on my boat is in progress
I encountered a strange moment when turning on the engine - when 12 volts are supplied, it shows a very short control pulse on DCSW.
the main contactor trembles slightly.
This problem is easily solved by installing a capacitor on the contactor's starting winding. Of course, TVS diodes are installed on both the main contactor and the precharger.
Has anyone encountered a similar problem?
There are no extra pulses when controlling the precharger.
It turns on as expected and then turns off after a few seconds.
spring has come, the ice has melted from the river, installation on my boat is in progress
I encountered a strange moment when turning on the engine - when 12 volts are supplied, it shows a very short control pulse on DCSW.
the main contactor trembles slightly.
This problem is easily solved by installing a capacitor on the contactor's starting winding. Of course, TVS diodes are installed on both the main contactor and the precharger.
Has anyone encountered a similar problem?
There are no extra pulses when controlling the precharger.
It turns on as expected and then turns off after a few seconds.
Re: EM57 Resolver connection, need help
Hi everyone.
I'm almost finished assembling my boat; it's launching in the next few days.
I wanted to ask: how can I get data for the instruments—engine RPM, current? Can I use the CAN bus? What's the best way to do this? Can you tell me where I can read about this?
I'm almost finished assembling my boat; it's launching in the next few days.
I wanted to ask: how can I get data for the instruments—engine RPM, current? Can I use the CAN bus? What's the best way to do this? Can you tell me where I can read about this?