Rotor position intermittent missing

[SRedd.5]

I have generated the code with workbench 6.1.2 planning to migrate to 6.2.0 but meanwhile i am finding one issue consistently. I am using digital hall sensors and i am constantly getting a gap as below in the rotor angle after every some duration. Is it normal this is the cube monitor logging?

I have captured the phase current and i find a small glitch which happens consistently.

If it is related to the rotor position. Please help to solve this issue.

[GMA]

Dear Redd.5,

If the motor spins correctly, it means that the rotor position is correctly handled internally (otherwise, a speed feedback error could be trigged). Maybe some data are missing with Cube Monitor interface...
Is-it possible for you to try with the "ST Motor Pilot"?

[SRedd.5]

My board is a custom board so i think i cannot connect the ST motor pilot. When i plot with DAC i do not see such gap.  

[cedric H]

Hello @SRedd.5,

You should be able to connect the ST motor pilot if you have a way to connect an UART of the STM32 to your USB PC socket. One way is through the STLink virtual com port at the condition that UART RX & TX pins are accessible.

Regarding the fact that with DAC you do not see such gap, it confirms @GMA hypothesis.  You lose data with Cube Monitor. It is a monitoring issue not a Motor control firmware issue.

Regards

Cedric

[SRedd.5]

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@cedric H wrote:

Hello @SRedd.5,

You should be able to connect the ST motor pilot if you have a way to connect an UART of the STM32 to your USB PC socket. One way is through the STLink virtual com port at the condition that UART RX & TX pins are accessible.

Regards

Cedric

But i am worried that i need to integrate the complete UART code of motor pilot , iam already using CAN. I do have access to UART pins.

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[cedric H · Accepted solution]

Indeed, you need to enable the Motor Control Protocol from the "User Interface" section of the MC Workbench to be able to communicate with the MC Pilot.

Regards

Cedric