Hi,
My customer have problem about motor driving sound w/ stepping motor.
They evaluate DRV8846 by using EVM, however, motor driving sound does not reduce.
(Previously, they are using discrete constitution, however, they faced motor driving sound problem, so they want to use micro step driver to reduce motor driving sound.)
Here is confirmed items by using their system.
* Reduce Ifs to meet motor spec.(Default GUI setting is Ifs = 1.00, but I changed to 0.21)
* Increase motor spining speed. (Change Starting / Target speed)
As a result, motor driving sound was reduced than before, however, when I set Ifs small value, spike current is observed at "coast mode".
I think that coil resistor of this motor is a little bit high than others, so I used another stepping motor to compare.
As a result, any spike current was NOT observed.
Therefore, I have two questions.
1. Do you have experience which you used motor which have high coil resistor ? (If possible, I want to know exact coil resistor value.)
2. Could you please tell me how we can decide “torque” ?
Best Regards,
