sim-
Sunnysky 2204 2300Kv stutters at full throttle with COMP_PWM enabled
On one of my mini qauds I have been running 2014-3-6 with COMP_PWM enabled. It flies very well and displayed no problems but while doing some testing with props removed I noticed that at full throttle the motors stutter. They don't stall completely but just stutter. I never noticed while flying because I'm rarely using full throttle. I downgraded to 2013-5-15 with COMP enabled and the same thing. Stuttering at full throttle. I re-flashed with 2013-5-15 COMP disabled and no stuttering. The problem is that without COMP I do notice less stability but I'm afraid to use it. Is this a correctable issue? Is it a known issue?
Yep, I noticed the same problem with 2204 2300kv....they shutters at full throttle. I tried with an all N-Fet (fw BS_NFET) such as HK F30-A both with last FW then with 2013-5-15. With these motors all is ok until 85/90% of throttle, beyond that they shutters. Witth COMP_PWM enable they have serious sync problem at 15% of throttle. I also tried with ZMR 1804-2400kv and they works well even also with latest fw or 2013-05-15 and with COMP enabled. Can someone investigate please? Thanks
Max
If someone needs a SS motor with which to test I would be happy to provide a loaner. I would want it back after testing however. They are hard to get you know.
Where the BEMF capacitors removed from the ESC for testing ? I always removed them from my F-30A's.For those high KV motors i see the HK Tz12A/Mystery (or similar clone/brand) is applied with 2013-5-15 firmware. @sim- I could not find whether or not it is ALWAYS a good idea to remove the BEMF caps.?
@sim- I can confirm that this is still a major problem with Cobra 2204 2300KV motors used for mini race quads in the 250 class. I tested today with latest repository (6dbc056a71161593cc8eaf08f8959cf4ea6e4ce6), PWM_COMP enabled. With or without using the oneshot125 range. Here is someone who claims to have worked a solution (?): http://www.rcgroups.com/forums/showpost.php?p=30894613&postcount=1509