Mutliwii Crius SE altitude test using default PID to see if the quad frame enhancements I made improved performance and the tests were very good. On previous flights, I could not make altitude hold to work and the quad would oscillate wildly up and down.
During the tests it still oscillates but will actually stay within a much narrower corridor. I loaded a different sketch which was modified specifically for the Crius SE and even indoors I find the altitude hold works very nicely.
Will be doing more tests outdoors with the wireless telemetry to check and be able to make adjustments on the fly.
 Hold Tests){kind=link}
Did you find the freeflight board would rotate or act unusual on low power?
Deciding on a altitude hold FC now.
Hi! Never got to that point with the FF … but I did notice it would bob
up and down a lot. I’ve been working on the Rabbit FC with sonar and baro
… it’s unbelievable how it can stay at one height when activated. It’s a
bit more expensive than the Crius but with the alt hold is very good (vs
the Crius).
Thanks, been thinking of the rabbit with carefree upgrade vs naza and may
go that route but want alt hold to help with learning fpv
PS the wii new board gps is quite low cost now too so aybe another
contender for naza.
MWC GPS RTH and Position Hold for the Crius is hit and miss like alt-hold
at least for me. The Rabbit has been improving steadily as the developers
have been working closely with end-users to improve the code (not open
though). KKUSA on his own has been working on a improving the GUI that
includes GPS support. For the price and its performance, it is more than
what I expected. FYI, PTZ support for the Rabbit is built in but I have not
used it yet.
hello, may I ask how do you enable your barometer sensor as I am doing a
research on altitude hold for my quadcopter project in school ?
What Multiwii version have you uploaded to your flight control board and
what GUI are you using?
i am using multiwii se v2.0,, and the same problem is occurring with my
quad… normally it fly well,, but when i put it into alt hold mode the
quad going little but crazy,, it starts shaking and also not hold the
altitude.. i am using multiwii v2.1 sketch and just enable multiwill se
v2.0 and all individual sensor is unmarked.. can you pls help me
Update to MWC 2.2 as alt-hold is better. The way I engage alt-hold is to
bring the copter to a hover … then engage alt-hold …. do not touch the
throttle as this will remove alt-hold even if the flight mode is enabled.
thanks for your reply, but the problem is , My quad flying well when i
disable alt-hold..and automatically hold the altitude(little bit) in decent
weather. but after reaching a certain height when i enable alt-hold mode my
quad start dancing up & down…i have tried 2.2 but nothing changed… i
have read that alt-hold is not soo good in MWC.. but is there anything that
i have to change in PID setting of ALTITUDE mode in MWC GUI?
Google Multiwii Barometer PID tuning … that should come up with
something. Will it result to pinpoint alt-hold performance? Nope – you’ll
get what you see in the video. Only with serial Sonar can you achieve
almost steady altitude hold up to 3M … but Multwii does not support
serial Sonar alt-hold for the moment.
thank you very much,, your reply helps me a lot..
Sorry I could not be of more help and good luck!
I wonder if you could help me.. 🙂
I’ve got two MW boards, both from HK, a NanoWii and a 328p, I’ve just been
setting up – testing them indoors, I’m not yet using baro on the 328p, the
copters go up and down on their own, throttle is choppy, any ideas how to
solve this? I’m running 2.3 on both, tried calibrating esc’s, different
radios, to no avail. Thank you :)
I did and all was fine, also returned LPF to default.
+joseico90 20 Hz LPF? That means you have a serious vibration issue …
balance your props / motor.
turned out it needed the 20HZ LPF filter, now they are flying fine 🙂
Did you cover your baro with foam to keep away the wind and light? It has
to be porous foam and preferably black in color. Alt-hold throttle level
has a sweet spot … get your copter level with throttle at mid-point then
activate the Alt-hold … it will not be perfect but you should maintain an
altutude within an envelope. Check in the GUI is Alt level changes (move
copter up and down) it should show some activity. Go back to MWC 2.2 and
fly Horizon or Angle mode … be sure your props and motor are perfectly
balanced or your copter will be very twitchy.
What PID values are you using? When you say ‘default’, what are the default
values?
Default values are those that the skecth automatically assigns to the
different sensors. The board is no longer connected to this frame and is
loaded with MWC 2.2
is this for sale?
Unfortunately, this quad has been dismantled. If you want to put a quad
together, go with the MWC Pro board. You can DIY a frame from wood and they
fly just as good …
is it possible activate alt hold with the multiwii328p using the baro? or i
need a gps module?
+Luca Nsh Greetings … If you want altitude hold, then you need a 328
board that has a barometer and enable alt-hold (baro) in an Aux channel. If
you want position hold (GPS hold) then you need a GPS which the 328 will
not support natively. I suggest you get a WMC 2560 Pro board or an APM
board as these perform a lot better than the 328.
hi, in your personal opinion, is there any F/C as economical as Mwc SE but
better Alt. Hold feature? Thanks.
+tsisapik great! thanks for your fast reply and advice.. will check the
link a.s.a.p… cheeers
+Gatot Boediman Personally, if you want a better FC, go with the MWC Pro
boards (go to readytoflyquads) for not only better alt-hold but the
capability for GPS flight modes at a price that will make you smile … If
you want one of the best boards to play with, look at the APM boards (same
place) … those have an alt hold you will not believe ….