So, after a hectic summer, and a still busy winter, I will post an update.
We got the Danfoss valve to work using the code I posted on Github. My friend (who owns the tractor) also spoke directly with a Danfoss representative, who tested a PVE valve on the test bench. The Danfoss tech guy recommended using PWM 4KHZ or higher. This said, our Danfoss valve worked fine on the default PWM speed. Well, that is after we had the PID set up properly. The end result was that we had to turn up the minimum PWM quite a bit, and keep fairly low values in the PID. Sorry, I don’t have all those values with me. However, this only worked with old versions of AOG, which brings me to:
We wanted to use the newest AOG (several reasons, I forget what all). When I discovered the ESP32 project that doesn’t use steer characteristics info coming from AOG, but can be set in the built in webUI, we switched to the ESP32. So far we are happy with the performance, and I am now working toward a PCB to plug the ESP32 into as our setup looks crummy, and we experience occasional disconnects. It’s not surprising, given the state of wires in our setup.
There’s some small changes I made to the ESP32 code, and when I have proved the code/PCB a bit, I will see about making a GitHub repository to share the PCB, code and BOM. Until next time, gotta run…