by Wingspinner » Wed Jul 18, 2012 2:21 am
SimonK may work on the bench with Simonk software but it is a well known problem that under load they get out of sync and perform terribly. After much effort and experimenting I gave up on Simonk software and was able to get wii-esc to work very well. I've posted about this both in the Simonk forum on RCGroups and also on the multiwii forum. "High" timing is advanced timing but the real problem with Simonk software is the way he does zero crossing detection. I think the reason it hasn't been fixed is he didn't actually write the original algorythms in his software as it its a re-write of someone elses software where Simon has added features but not really done much, if anything with the actual motor algorithyms. I worked with him and got the impression that he didn't know how to fix it and had really given up.
I'm not an expert on motor control either but I did find that with the wii-esc firmware using the option of advanced timing by one increment (I forget how my microseconds that is) the MT3506's work beautifull. It's good to know that they work fine on MT3506 however I would not be confident in that unless it was tested in actually flying conditions where RPM's and load are changing rapidly. They can be made to work fine on the bench with Simonk as well but not in flight.
Cheers,
Ron
Ron
"WingSpinner"