DRV10983: using DRV10983 to drive MY-3518c motot , the motor sometimes spins clockwise ,sometimes spins anti-clockwise when start-up ，why？

Hi,

1. in openloop mode or closeloop mode   ,using DRV10983 to drive MY-3518c motot , the motor sometimes spins clockwise ,sometimes spins anti-clockwise when start-up ，why？

I see that you are using ISD have you tried using Align instead? This fix your counterclockwise issue at startup. 

2，in openloop mode ,the speed of motor is controled by the 0x26 register . the speed can config form low to high but can not config from high to low , why ?

The open loop threshold is not meant to be used as a speed controller. I assume that the open loop speed can only go faster because the open loop speed controller was only meant to increase the speed of the motor or hold it steady.

Regards,

Michael W. 

hi friend ,

     I tried :

     1 , turn OFF ISD  and IPD  , turn ON  Align , but they do not work for the first issue .  the motor sometimes spins clockwise ,sometimes spins anti-clockwise when start-up

      The data in the  registers is as follows :

     {reg_addr , reg_data }

     2, turn OFF  IPD  , turn ON  ISD and Align , they alse do not work for the first Issue ,too . the motor sometimes spins clockwise ,sometimes spins anti-clockwise when start-up.

 The data in the  registers is as follows :

 {reg_addr , reg_data }

please help me , thank you very much . my email address is 864352225@qq.com.  email or reply to me if you have good ideas .

Regards, 

ZhangJian

Hi,

After talking to my team I suggest that you use IPD rather than align. I think that you need to tune IPD using the following guide.

https://www.ti.com/lit/ug/slou426a/slou426a.pdf

Regards,

Michael W.