DRV8711 start noise. Can I control the start point?

dh Paeng

Prodigy 100 points

Other Parts Discussed in Thread: DRV8711

I use DRV8711 and I control the stepping motor.

I set resistor.

So current wave form is good.

but I have one problem.

If left start point , sound is noise.

but right start point, sound is clear.

Can I control start point? or have other method?

over 10 years ago

0 Rick Duncan over 10 years ago

TI__Guru** 114905 points

Hi DH,

Can you clarify? From the scope captures, it appears that the difference between left and right is the DIR pin. Is that correct?

The indexer is designed to start at the home state, but can be advanced prior to setting the ENBL bit in the SPI.

Please try the following:
Set SLEEPn to a logic high, RESET to a logic low, set the step mode and other bits in the SPI. Then issue the number of steps you want to advance from the HOME state. Finally set the ENBL bit.