Hi, I am using L6235Q Evaluation board for my brushless motor. I connected the board to the motor and the motor not moving. the connection is so simple but the motor is not moving.

[IGAL TALOR]

I am using 12V motor, all the phase I measured 12V, its look like it stuck at brake.

what can be the problem?

I am using motor 1028m012b - FAULHABER

[IGAL TALOR]

The motor at the power up try to move but not moving (feel vibration at the start).

the HALL EFFECT H1=0 H2=1 H3=0 not changing.

[Cristiana SCARAMEL]

Hi @IGAL TALOR​ for easier reading, please try to concentrate the information in a single post.

Where you are applying the VREF voltage instead of J3-11?

Are you applying the 5V to the J3-1 pole?

If you identify a mismatch between board and schematic please share the information, thanks.

[IGAL TALOR]

the VREF from J3-11 is not connected as shown at the schematic, I checked it with FLUKE.

now I connected VREF from J8-3.

Do you know about another mismatches?

[Cristiana SCARAMEL]

Hi @IGAL TALOR​,

I checked the board connection: the silkscreen of J6 solder bridge is swapped compared to the schematic.

The right info for VREF source selection is reported in the figure 1 of data brief .

If the issue persist I suggest to check all the IC pin status with a oscilloscope probe (not multimeter).

[IGAL TALOR]

HI,

I am waiting for a new motor that I ordered.

I think that the motor that I used was damaged.

the hall effect not changing.

[IGAL TALOR]

Hi,

I am using PWM with FWD/REV input.

sometimes the motor stucked and not moving.

I am rotating the motor with my hand and after power on the driver, the motor is moving.

I don know why sometimes the motor not moving.

[Cristiana SCARAMEL]

Hi @IGAL TALOR,

so in summary, the solution to your original question was to replace the damaged motor (Hall effect signal missing), right?​

If I understand well, we can consider closed this topic.

Please open a new topic for a new question.

[IGAL TALOR]

No.

I found another mistake at the evaluation board and the schematic.

the correct connection:

OUT3 J5-3 to motor pin 3

OUT2 J5-2 to motor pin 2

OUT1 J5-1 to motor pin 1

I checked with fluke between the IC to the J5 connector, the schematic is not correct.

now the motor is moving well with PWM with FWD/REV signal.

[Cristiana SCARAMEL]

Hi @IGAL TALOR​ ,

I had already reported in a previous posts (July 20) how to connect the motor properly to the J5 connector.

There is no a misalignment between board an schematic, the silkscreen near the connector indicates the IC OUT number, not the J5 poles number.

Anyway, now the motor is running, fine!