Replies to This Discussion

Permalink Reply by Jonathan M on March 16, 2012 at 2:34pm

Just came back from the field after testing with the latest (as of yesterday evening) GIT v2.5.   My setup:  3DR frame, DT750 motors, 11x4.7 SF props,  APM 2.0 mounted on o-ring suspension,  GW: 1300-1400 grams depending on battery.

Wow!  By far the most stable and least drift I have ever flown.  Very impressive dev team!  I tested stable mode, alt hold, loiter, and RTL. 

Stable:  As stated, little to none of the drift I had become accustomed to since I started on my project.  I haven't tuned much yet, but it's very stable with the param file attached.  Aggressive flying doesn't seem to get it out of sorts.  There is still some minor drifting every now and again, but it's much improved.  This platform seems stable enough to finally do some aerial photography/film!

Alt hold:  Best yet, and i only use the baro.  It does seem to sink a bit when aggressively flying in this mode ( 3 to 5 ft), but I may have turned the Throttle P down too much.

Loiter:  Not so good ,but I haven't tried tuning yet.  I get oscillations and over shoots.

RTL: didn't work well, and seemed to mimic loiter in the over shoots.

One issue that I did notice was this strange uncommanded yaw of about 10-20 degrees when flying away from me.  Reading up on this thread makes me think that this is a known issue.  Since, I have the latest GIT, I thought this was resolved.  Maybe not?

All in all, great effort and results!  I am going to tune it up a bit and test again.  Of course this weekend has to be the biggest storm of the season in San Diego :)

Attachments:

• v2.5_good1.param, 3 KB

• ▶ Reply

Permalink Reply by glenn nafin on March 16, 2012 at 3:29pm

how do you pick what to use for alt hold? sonar or  baro??

• ▶ Reply

Permalink Reply by Jonathan M on March 16, 2012 at 3:50pm

I don't have a sonar, so it's an easy choice :)  If you do have a sonar, you can select if you have a sonar under the setup tab in the MP.

• ▶ Reply

Permalink Reply by Dave C on March 17, 2012 at 1:26pm

Baro accurate to 1-2m APM1, much better on APM2

Sonar accurate to about 5cm if its tuned right (up to about 3m) 

Also with sonar you can 'terrain follow' - invaluable for low RTL over un-even terrain - and it looks amazing ;)

• ▶ Reply

Permalink Reply by Todd Hill on March 16, 2012 at 5:06pm

Just came back from flying Git version 2.5.  Quad did well, Y6 was worse than v2.4.1:( 

Calibrated mag, ESCs',  usual setup.  Used the same PIDs' as previous version with no luck.  Tweaked them some, and still no better.  Yawing bad left and right.  Try to give yaw input and it would tilt sharply in direction of input. Adjusted top bottom ratio, but no good. Sometimes it would not stop yawing after giving it yaw input.  It was as if it was drunk off of its stool.  

Version 2.5 was much better than v2.4.1 on my quad.  Y6 actually flew better on 2.4.1.  Will reload and run the setup again. Attaching a log if anyone wants to take a gander.  Y6, 650kV motors,  APM1 2560.    

Attachments:

• 2012-03-16 06-08 76.log, 1.2 MB
• Y6_Param_v2.5.param, 3 KB

• ▶ Reply

Permalink Reply by Dani Saez on March 17, 2012 at 9:20am

Any news on the Y6 with 2.5??  I'm planning on testing it tomorrow on my Y6.....

• ▶ Reply

Permalink Reply by Todd Hill on March 17, 2012 at 9:56am

I am reloading and going to try it again in about an hour.  Got the tri-pod and camera out to video it this time.  

• ▶ Reply

Permalink Reply by Steven Harsanyi on March 17, 2012 at 5:04pm

I am having the same problem with my y6.  My 400g quad is flying the best it ever has.

My y6 is behaving exactly as you described.  I cannot even takeoff because the copter wants to spin in circles.  If I load 2.0.50 back to my y6 it flys great. I am trying to sort it out now.

• ▶ Reply

Permalink Reply by Dani Saez on March 17, 2012 at 11:55pm

Do you have your motors tilted on the Y6??

• ▶ Reply

Permalink Reply by Gustav Kuhn on March 17, 2012 at 12:41pm

Hi, is there a problem with 2.4.1 when using a quad in x-mode?

My + quad is very stable, part of my setup test is to advance the throttle to hover speed, and then holding it by one leg, the quad remains level.

When doing the same on a x-mode quad, it seems to first "lean" INTO the error, before trying to correct itself.

Both using APM 1, my quad is the old standard quad, the other one a make I don't know, but the motors, props, and physical layout/spacing the same.

Same code in both.

Thanks,

Gustav

• ▶ Reply

Permalink Reply by Todd Hill on March 17, 2012 at 1:02pm

x mode is all I run on my quads.  No problem in stabilize mode.  

• ▶ Reply

Permalink Reply by Gustav Kuhn on March 17, 2012 at 1:12pm

Thanks for the reply.

I've calibrated the ESC's, confirmed that the motors are sequenced correctly, the APM is mounted correctly, Mission Planner tells me the board is functioning correctly.

A bit stumped here.

Oh well, tomorrow is another day.

• ▶ Reply

• ‹ Previous
• 1
• …
• 87
• 88
• 89
• 90
• Next ›
• Page