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 · ‎2021-07-19

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

Cristiana SCARAMEL · ‎2021-07-20

I confirm that the only configuration that brings all outputs high is the brake function.

Try to verify the voltage as close as possible to the BRAKE pin (#20), if is correctly set high.

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IGAL TALOR · ‎2021-07-20

I checked pin 20 =5V.

also checked pin 19 and i found that Vref is 0V,

the problem with the evaluation board, I connected J6 2-3 and J3-11 to 5V, and no vref voltage.

still the motor not moving, but now I see current consumption from my power supply.

IGAL TALOR · ‎2021-07-20

I measured PIN 20 BRAKE = 5V

checked PIN 19 VREF = 0V

the problem is with evaluation board I connected J6 2-3 and powered J3-11 with 5V and no voltage to VREF.

now I powered the VREF and I see power consumption but still the motor not moving.

IGAL TALOR · ‎2021-07-20

The schematic of the evaluation board is not correct.

IGAL TALOR · ‎2021-07-21

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 · ‎2021-07-21

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.

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IGAL TALOR · ‎2021-07-21

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 · ‎2021-07-22

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).

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Cristiana SCARAMEL · ‎2021-07-29

Hi @IGAL TALOR ,

are there any updated about your project progress?

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IGAL TALOR · ‎2021-07-31

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.