Wanted to post my progress this far and say a big Thank You to Brian especially and all others who contributed.
I built a steering system for our MX305 accuguide ready tractor using the built in hydraulic solenoid, wheel angle sensor, and disable switch. The display was a Surface Pro. RTK signal provided by a pair of Ublox F9Ps - one as a base station, the other as the rover. Corrections transmitted via NTRIP. The base station F9P uart TX was fed into a Rasperry Pi which used RTKlib to stream to the RTK2GO NTRIP server. Roll was provided by a Dog2 inclinometer.
I will try to list my best and worst liked things below. Some of these may change with the more recent versions as I was using an older version of the software.Also - if anyone knows how to enable the safety steering solenoid (the one that enables the proportional steering solenoids) using the stock wiring harness I would love to hear from you.
Things I liked:
- A physical switch to disable the steering
- u-turn capability
- built-in NTRIP client
Things that need improvement:
- Steering stability. Front tires were always oscillating. I could tune for a specific speed somewhat well, but not good enough for critical applications.This is a big one for me.
- u-turn line following. Tractor always turned wider than the desired curve for some reason.