STM32 Timer Encoder: motor velocity and position

[@steppeschool3629]

Hello guys, This video is about robust velocity and position measurement using Encoders. Timers are used to read the encoder's output. Since everything is implemented at a hardware level, minimum code is required😀. The source code can be found on my community and Patreon pages: www.steppeschool.com/products/communities/steppeschool-miscellaneous www.patreon.com/user?u=80399744

[@lohikarhu734]

Looks like nice way to handle "edge conditions".... I haven't read the timer information, yet, so I was surprised to see overflow on such a low speed operation. Thanks!

[@ApertureApex]

Excellent video! Thank you.

[@steppeschool3629]

Thanks a lot!

[@7alfatech860]

My, what small hands you have when turning the car wheel🤣. Good to see you've got your kid involved. And excellent video, BTW

[@steppeschool3629]

😂😂. Thanks 👍

[@klebolek]

Nice video! Thanks for help and explanation!

[@steppeschool3629]

Glad it helped!

[@botak333]

Its that with Quadrature Encoder with Differential Signals sir???

[@steppeschool3629]

Yes it is quadrature encoder

[@botak333]

@@steppeschool3629 it posible to used for pmsm motor sir??

[@lehuubaothuan8559]

sprint("thanks verry much for your video!");

[@steppeschool3629]

thank you!

[@faezefaraz]

Why does it show zero speed in all cases when I run this code?

[@woldecosgrove]

Hello nice work! i like your video very much, but i cant find the code, i am already accessable to your web page, please advise the website to your code...thx

[@vscm167]

Would you please share the link to buy this kind of motors? They look good!

[@steppeschool3629]

It is called: GA25-371. I bought it in Digikey with a kit. www.digikey.fr/fr/products/detail/seeed-technology-co-ltd/110090264/10290303?s=N4IgTCBcDaIIwFYCcB2AtHOAGLStgDYAWNAOQBEQBdAXyA You can also buy it separately. Just google. I usually mention the hardware I use in the video's description.

[@bobby9568]

You are very smart!

[@steppeschool3629]

thanks😀

[@unholy1771]

Why didn't you simply use the encoding of the channels to find position and then speed? Would've been cleaner, faster and provided more resolution

[@steppeschool3629]

Because the counter of the timer has limits. It cannot count to an infinity leading to overflow issues. Therefore, it is better to compute the velocity and then position. Hope I could answer your question

[@LeTruong123]

velocity here is rad/s ? right ?. I use motor 330rpm around 33rad/s but your code just read 7 rad/s. It is not true

[@steppeschool3629]

My code shows the velocity in terms of the number of ticks of the encoder. In order to convert it to a physical unit, it is necessary to divide it by the number of ticks per revolution. Then you get a number of revolutions,

[@LeTruong123]

@@steppeschool3629 Thank you, I can do it

[@samibahlous979]

Very nice work , i just want to ask do you mean by the encoder position the distance traveled by the wheel of the motor or the number of ticks done by the encoder . Thank you !

[@steppeschool3629]

The answer is yes and no. The encoder returns the number of ticks done by the encoder. However, you can scale it to show the real distance traveled by the wheel, by knowing the diameter of the wheel and the number of ticks per rotation. Actual distance = number of tick * (pi * radius of wheel) / (number of ticks per rotation)

[@samibahlous979]

Thank you !@@steppeschool3629

[@shanmugaraj4755]

What software you used to programming

[@steppeschool3629]

Hi, I used STM32CubeIde, a standard software tool for programming STM32 MCUs.

[@machmanish1]

Guys, avoid this person. He is showing different code that then what is actually written. With 2 hours of work i was able to make it working.

[@ethukusj4743]

bro can u plz send the code and your videos were awesome?

[@steppeschool3629]

Hello, You can access the source code and other materials on private repositories on GitHub. For that, you need to join my community: www.patreon.com/user?u=80399744

[@lohikarhu734]

Pay to play... I guess it's a way of getting actual income for the work