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STMBL motor driver -- Electronics and Software.

jcdammeyer

jcdammeyer

John
Premium Member
This thread will be about the STMBL drive which is open source for both hardware and software. However it's poorly documented and now 6 years or so old.
github.com

GitHub - rene-dev/stmbl: AC Servo Driver for STM32F4

AC Servo Driver for STM32F4. Contribute to rene-dev/stmbl development by creating an account on GitHub.
github.com github.com
A link for getting started is here.
github.com

stmbl/docs/src/Getting Started.adoc at master · rene-dev/stmbl

AC Servo Driver for STM32F4. Contribute to rene-dev/stmbl development by creating an account on GitHub.
github.com github.com
And the forum where there were discussions but now not much other than single word replies from the authors is here:
gitter.im

Element

gitter.im gitter.im

My plan is to use this as a sort of blog as I learn how the code works and write up a detailed program operation description. It's a very impressive project. Done by very clever developers who, like a lot of software developers, couldn't write good documentation if their lives depended on it.

I have 3 of the drives. One running my 4th Axis which is an AC Servo with quadrature encoder. I drive it with step/dir signals from the CNC application. The other two were supposed to be spares or perhaps run the DC Brushed Servos. That never worked well so I abandoned that.

You can see in the photos that the PC to STMBL and Encoder to STMBL is done with RJ network type connectors. Fine if your hardware supports that. My Harmonic drive didn't so I created some interface board that converted signals like step/dir/enable and fault into the RJ network cables.

I'm still working through how all the code connects. More on that in the next posts.
 

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This is an older post, but I'm curious. How did things go with looking into the STMBL drive? A google seach lead me to this post when I was looking into open source hardware.
 
code-guy said:
This is an older post, but I'm curious. How did things go with looking into the STMBL drive? A google seach lead me to this post when I was looking into open source hardware.
Click to expand...
I have it running my 4th Axis Harmonic Drive AC Servo. One day I'll even use it when I finish the castings that go with that project. One of the principal supporters of LinuxCNC, Andy Pugh uses his for his Harmonic Drive too. He's the one that linked me to the same motor he uses. Lucky Ebay purchase.

I have two more that I wanted to use with DC Brushed Servos but one of the Servos ended up with problems so I never took that further. It's a nice drive but I don't know if it's still being supported. I haven't been on the support group list for a long time.

I also have 4 HP_UHU DC Servo drives, 2 complete, 2 partially complete.
HP_UHU_Modified.jpg

One UHU drive based on the original that also works.
Test_UHU.jpg
And two Gecko DC Servo drivers never used.

I'll check with Andy for the location of the STMBL forum.
 
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