Replies to This Discussion

ModeratorPermalink Reply by Graham Dyer on July 31, 2012 at 3:39am

Most people are using the defaults very successfully, what problems are you having when trying the defaults?

• ▶ Reply

Permalink Reply by Project Nadar on July 31, 2012 at 4:00am

Graham,

 

It will gradually move away from the indicated position just like the stabilised mode will. (There was some very light breeze during this test). It kinda doesn't correct it self ( I always take off when the gps lock led is solid). With some other settings it just dived for a foward flight. I will however make some more tests and if i find out how to download logfiles from the onboard memory i will post them. I don't know how to read them though.

• ▶ Reply

ModeratorPermalink Reply by Graham Dyer on July 31, 2012 at 4:19am

It should attempt to stay within around 3m x 3m. I've had it not responding to loiter at all but there seemed to be some problem with my GPS, rebooting fixed it. If you have a higher P then it should try stay put more aggressively but maybe with too much correction.

If you're not getting any response to switching to Loiter then maybe something else is wrong? You should see a slight tilt as the quad moves away from the point where you switched to loiter.

• ▶ Reply

Permalink Reply by Project Nadar on July 31, 2012 at 4:36am

I am pretty sure that the GPS is functional. I noticed a pendulum effect around the locked area. I did bring down the P to 1.2 at some point but nothing succesfull. I read that a lot of guys use values of 0.2 - 0.6. I am gonna try in that range later tonight when the wind is down for supper. Will come back with some log files and flight data. In order to post a picture how the flight plan route on the google map i need to have telemery or it saves the flight log in the gps and can be viewed on the MP?   

• ▶ Reply

ModeratorPermalink Reply by Graham Dyer on July 31, 2012 at 5:08am

A .log file, .gpx file and .kmz file (Google Earth) will be saved on the APM2, a tlog will be saved on the PC if you use telemetry.  My Rate Loiter P is 2.0, I is 0.08, D is 0.4 and IMAX is 30

• ▶ Reply

DeveloperPermalink Reply by jasonshort on July 31, 2012 at 9:46am

The mediatek is just has so much latency that it's hard to keep the gains high enough to get the copter to stay in one place. The new uBlox w/patch antenna solves this in a big way. If Loiter is really important, I would switch.

Jason

• ▶ Reply

Permalink Reply by Project Nadar on August 3, 2012 at 10:22am

Here is my log and kmz of the latest flight. I had the loiter P at about 1.500

Attachments:

• 2012-08-03 20-06 3.kmz, 73 KB
• 2012-08-03 20-06 3.log.gpx, 212 KB
• 2012-08-03 20-06 3.log, 496 KB

• ▶ Reply