Stronger and lighter... win-win. The RCTimer gimbals are economical for us in the USA, but they are odd balls. Both lack balancing adjustments, and if I am not mistaken the roll axis on the big one is belt driven... lame.
big one does not lack any adjustment,small one do but its irelevant bcs is for only one type of camera and it IS balanced for her i guess....on bigger gimbal,roll is problematic if you want extra bearings not the motor ones,mine also have gear 1:1,belt would be better(i plan to do it)...rctimer is still in process of redesign servo gimbal and they still have no picture with roll solution but for me very good looking...rctimer was always ok for me..motors,esc,frames acessories..free shiping..only minus is copying APM controler and radio..but there is another thread around here about gimbals,sorry will stop here now...
also you can always order all new Movi Mr from FreeFly Systems
they for sure know how to make showreel and other marketing tricks
Total retail cost of MÔVI MR is $14,995. Secure yours now with a down payment of $2,500.
but this is rediculous bcs it is the same tehnology as BLGC from ALEXMOS
who gave us this almost for free if you DIY
...and than you can combine movi mr with this
and for some 100 000 $ you are ready to go into buissnis
PFFFF...I WILL RATHER DIY....
Wow Emin... I thought Zenmuse was way overpriced! ;)
Sorry... ning ran out of room for replies below.
I'm trying to get to the bottom of what appears to be two motors getting worked harder than the other two. Motors 1 & 2 (CCW?) appear to be consistently getting worked harder than 3 & 4. Is this abnormal? Seems like this might be because it is working hard to compensate for a tendency to yaw CCW?
I have recalibrated the accelerometer.
The centre of gravity is within 5 mm of the centre
All the motors are vertically aligned, props tracking well.
I've hooked it up via USB and plotted the motor outputs - when the throttle is first applied, and motor outputs are equal, as you might expect.
I've attached a log from a short test flight, hovering in the garage.
just updated to 2.9.1b. was excited to give it a test considering i have a plastic frame and vibes are probably. first test the alt_hold was now horrible. really bad oscillations, and height fluctuated dramatically. I already have thr accel at 1.1 (2.2 for i) and it was pretty good with 2.9.1
there was a slight breeze but it would've been fine previously. just wondering what the best way to correct this would be?
So do you think we can conclude the loiter flyaways and bad RTL direction are due to compass auto calibration going crazy ?
Don't think so.
These may actually be a symptom of something deeper. However it definitely makes it much more likely....
There seem to be quite a few routines going 'wrong' at some point. GPS readings (particularly with some GPS's), the compass cal, the handling of the accelerometer in loiter, altitude hold during yaw, etc. etc..
I've been playing with the code with auto-cal turned off, running without accelerometer for loiter, and while the loiter is nowhere near as good, this hasn't (so far) glitched, even using a Mediatek GPS. Wanders quite a few feet, and is slow catching gusts, but doesn't change height when it corrects position.
for me its quite evident in the FPV recording that the compass is making the quad fly in crazy directions. and it makes perfect sense as a compass reading wrong heading by 180 degress would create a positive feedback loop, sending the quad accelerating in the wrong direction like a bat out of hell.
i think that so far its very good news that all the people with manual compass calibration have had no fly aways.