What was the issue? It's always helpful to publicly document this to help others with similar issues.


I couldn't find a tutorial video or a setup article on the wiki until MANNY let me know.

The main reason I couldn't set up the resolver for so long was because I thought the S1, S2, S3, and S3 ...

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.

You need to find this yourself

https://openinverter.org/wiki/Using_FOC_Software

Tuning Process:

Start inverter -> start input or "manualrun" on web interface. Select forward direction.
Observe value "angle" and turn rotor by hand -> you should see angle changes between 0 to 360°. If not, check ...

Did you do a syncofs calibration procedure?


0.44V and 0.14V seems low. But if the OI board does not give a loreamp error the signal is probably fine. Measurement error?


Today I finished watching the tutorial video, I'll be adjusting the parameter tomorrow.
In OI board is NO Errors, mabe ...

UPDATE-
I swapped the sin and cos - physically swapped the S2 and S3 wires—now the engine accelerates clockwise, both in reverse and forward.
and I cant stop it.
The fuse trips, or I turn off the high-voltage power.
The engine itself doesn't stop.

Parametr PINSWAP sincos - did not give such an effect

From my experience, you shouldn't trust the resolver signal names, and try some different combinations.

Because even if you look up some drawings of resolvers, you will see different schemes from different sources.

Based on the resistance measurements you know, which coil is which (1x excitation ...

johu wrote: ↑Sun Oct 19, 2025 1:32 pm Did you ever check for the excitation sine wave on R1?

Also read forum rules on how to ask for support (param file missing)

No, I haven't checked the signal shape yet, I'm waiting for an oscilloscope.

It looks like the problem is only in the resolver.
I triple checked the connection - connection is absolutly correct.

checked the resistance of the windings
R1-R2 -11.9
S1S3 - 27
S2S4- 27.5

I'll try to adjust some parameters.

When turning the shaft manually - value of a variable ANGLE changes ...

update:
No Errors, OpenInverter starts
select forward or reversr
then pressing throtlle
the motor shaft starts to jerk in different directions!?
resover problem?

zippy500 wrote: ↑Sat Oct 18, 2025 1:30 pm this the drop in board OI board ?

Have you configed the syncoff ?

No, I have not.
How can this be done?

update -
OI - starts, NO ERRORS, OUT_ERR - is ok.
after switching FWD or REVERS - start pwm sound
pressing the thottle - sound increasing, The motor shaft twitches but does not rotate.
HVDC is rectified voltage 220, about 300V DC. Diode rectifier, fuses are of course present.

A friend advises ...

when inverter starts and IN_FWD gets _12V - can hear a pulsating quiet sound
disconecting IN_FWD - sound stops.
motor not spining

How can I check the polarity of HV DC?
is it correct?

Calibrating throttle - its potmin, potmax parametrs?
potmin - 950
potmax - 4095

when inverter not started, display memory errors give- - NO errors, bat error led is on
when inverter is started, display memory errors give - CANTIMEOUT 4 times

why error led(OUT_ERR) is always on?
why I cant start ...

Zieg wrote: ↑Sat Oct 18, 2025 12:44 am Did you calibrate the throttle? Also just checking but you did put either the drive or reverse input high, right?

No, I do not calibrate the throttle. How can I do it?
IN_FWD connected to 12V
IN_REV is disconected
IN_REV and IN_FWD connected to switch which switches one of them to 12 volts.

Yes. Resolver excitation signal is connected to GND and R1.
S1 and S4 connect to RES_S4S1 pin, the OI board should have 1.5V on this pin

Thank you!

Get connected.
R1 resolver pin to ENC_IN_Z/RES_R1
R2 resolver pin to GND
S1 and S4 resolver pin to RES_S1S4
S2 resolver pin to ENC_IN_A/RES_S2
S3 ...

Its seems to me - R2 must be connected to GND

some information:

S4 and S1 connect to GND?
what about R2 pin from resolver?
should I connect 5v dc to resolver?

Hello, friends!

I'm going to install an Nissan EM57 AZEO motor om my boat.

I cant get valid connection of resolver to Open Inverter board.

8 pins of resolver -R1,R2,S1,S2,S3,S4 temp1, Temp2.

on the board I have 4pins + 2 temp pins
temp+, temp-, to temp1, temp 2 on board, here is clear
R1 ...