[NAC1080] DevBoard: Motor Movement for certain distance/angle

[sparefroh]

Hi,

I want to move the motor for a certain distance (e.g. 180 degrees). I already tested the different methods of motor rotation (one-step movement, multi-step movement voltage- and time-based). However, none is fully satisfying, especially when using different smartphones as a power source.

One-Step Movement: During each test I get different results, i.e. the motor stops at different positions, although I did not change any setting (V start or max runtime)

Multi-Step Movement Voltage-Based: As long as I have enough power, the motor rotates. How can I stop it at 180 degrees using this setting?

Multi-Step Movement Time-Based: Same as above, as long as I have enough power, the motor rotates. How can I stop it at 180 degrees using this setting?

Generally speaking, is there a way to program the firmware in such a way to stop the motor rotation exactly e.g. at 180 degrees? Or can this only be achieved using a "mechanical barrier" at 180 degrees?

Best regards

[Kanahaiya_K · Accepted solution]

Hello @sparefroh ,

There is no explicit parameter setting for the rotation angle in the mobile application . However, the maximum run time (measured in milliseconds) and motor rotation mode—single one step , multi-step (voltage-based )  or multi-step (time-based )—may be configured using the mobile app, and the required rotation angle can be empirically determined.

The firmware regulates the rotation angle based on how long the H bridge (and motor) are turned on for. The firmware is modified, and the time is then modified by experimenting with various values for a particular motor.

There is just a timer running after switching on the H bridge, or a main loop is executed with a known cycle time. After the timer expires or the cycle count of the main loop reaches a certain number, the H bridge is switched off again. Timer value or loop count are set in firmware, or may be stored in NVM if the firmware allows remote configuration.

Regards,
Kanahaiya