START HERE |
|
Register | FAQ | PM | Events | Groups | Blogs | Calendar | Mark Forums Read |
Unregistered
|
Aerial Videography and Photography Aerial Video/Photo from R/C Helicopters |
|
LinkBack | Thread Tools | Display Modes |
01-02-2012, 10:59 AM | #61 (permalink) |
Registered Users
|
Any chance of trying a set of EDGE 813's?
__________________
Chris D. Bergen Bergen R/C Helicopters |
Sponsored Links | |||
Advertisement |
|
01-02-2012, 11:13 AM | #62 (permalink) |
Registered Users
Thread Starter
Join Date: Sep 2008
|
I dailed up the gain settings in Aileron and Elevator from 80 to 125. This has taken most of the over correction out of the swash. The heli also holds stable in a hover in auto.
Still need to dail in more settings, but it is flying pretty good. It still feels a bit 'rubbery' on the sticks so I will be bumping up a few other settings flybar vs. flybarless for video- I can understand your thinking Chris. Im trying flybarless because my flybar is soooooooo close to my triax mount it worries me. Im affraid it will catch the mount tubes on spool up I will keep you posted on my settings and results |
01-02-2012, 11:24 AM | #63 (permalink) |
Registered Users
Join Date: Mar 2006
|
Spinblades 710mm semi symetric
|
01-02-2012, 12:49 PM | #64 (permalink) |
Registered Users
Join Date: Mar 2006
|
Just wondering.....
Although a guideline, I assume the pre set settings in the ace one manual are not including front mounts and payload. Wonder if i put in the maxi joker pre sets i might get a closer setup to my logo 600 se with a camera mount...... Any thoughts? |
01-02-2012, 09:48 PM | #65 (permalink) |
Registered Users
Thread Starter
Join Date: Sep 2008
|
right now Im flying as a pod and boom, no mount and I had to increase the gain on both
I still need to play with everything ellse but just those two adjustments made a world of difference in auto. I am now hanging steady in hover in auto. My forward flight is off, heli drifts to the left even though I have my compass turned to the right a bit I think with the added weight you would need more gain not less but a 600 is shorter so your centrifugal forced may be less. I would try increasing the gains on aer and elv |
01-08-2012, 06:22 AM | #66 (permalink) |
Registered Users
Join Date: Mar 2006
|
Hi Chris,
Finally got out to fly and do a bit more testing. Your suggestion of dropping the flybar weight in the settings helped. Seemed to help the Ace One respond a bit quicker. I made quite a lot of other changes too. I went from the recommended logo700 setting and started again with a fresh install on the Maxi Joker settings. Right off the bat they were working a bit more like expected. I ended up softening up those settings and pretty much ended up in-between the two. I now have a much more dialed in hover. Although I now dont really like the way the heli flies in manual mode. Feels very odd to fly and a bit wobbly in fast forward flight. Also when flying backwards it wants to continually bank to the right. Not the case in forward flight. Bit weird. Anyhow, will be going back to the farm to test some more and see if I can sort these issues out. I also noticed with a high headspeed I get a tail wagging which I cant get rid off. Changed the gyro gains but to no avail. Mechanically flies input free in non HH mode. Lower the headspeed and its fine. Anyways I have posted up my new Logo600se with front camera mount settings to have a look at. Seems to be working much better in auto mode. More tests and so more reports... will let you guys know how it goes... |
01-08-2012, 02:04 PM | #67 (permalink) | |
Registered Users
|
Quote:
But, if your heli prefers the lower headspeeds, then you may be just fine. Edit to add, flew the eObs with PS1 mount on it, FBL with Rotortechs 830's, heavy bird at 30+ lbs RTF. VERY twitchy at first on cyclics, at appx 1500 HS. Spent quite a bit of time dialing in the settings so it flies nicely in manual mode. Also upped Expo to 30% in the radio. I have turned on the autopilot, but just to ensure it didn't go bonkers. All felt good so today we'll be seeing how well it holds an extended hover. And looking for a 1400-1450 HS..
__________________
Chris D. Bergen Bergen R/C Helicopters |
|
01-09-2012, 01:04 PM | #68 (permalink) |
Registered Users
Join Date: Mar 2006
|
Okay,,,,
Spent a while at the field today trying to dial this in. Still not quite right. It was blowing around 12km/h wind in gusts with about 4km/h average. Ace one seems a bit jumpy and unstable when it gets hit by the wind. I tried setting up the whole Ace One from scratch again to see if it made any difference. Answer is...not really. As it was slightly windy I thought it might give me a better result in setting up the gains for most weather conditions. I tried. Headpseed tail wag still an issue. Looked at the tail before I flew and the bearings are sweet. Regreased and put them back in. Dropped the headspeed and tail wag just instantly dissapears. Even with the higher headspeed the DJI didnt want to hold position to well, the lower headspeeds just made the Ace One corrections softer. I redialled in the flybarless before going into auto and ended up with close to what I had before. (see screens) (yes I did re-calibrate tx, center pos, and compass). I kind of ran out of time due to the dark setting in before I could finish dialling in the autopilot. I think the vertical gain could use some work. The auto settings I have are not right. Any lower and it drifts in a circular sort of motion. Any higher and the bird gets real twitchy when a gust of wind hits it. Bit puzzled really...Its better than it was but still far from right.... maybe Im expecting too much from the Ace One... dont know. I hear people saying its holding rock solid in winds. Mine kind of holds like a plate of jello as I trip over something! Any advice or a post of someone elses Logo600se with spinblades 710mm and front mount would be greatly appreceated. Just to see how far out I am to everyone else. Here is a youtube video of what I filmed today... excuse my language in it. Frustration is getting the better of me. Sadly its shot from a mobile phone...and the wobbles the heli is having dont look so severe in the video as they do in real life. [ame]http://www.youtube.com/watch?v=yLe60YDf8gA[/ame] I have a ton of jobs on and I cant keep delaying them so help quick if possible please! |
01-09-2012, 02:29 PM | #69 (permalink) |
Registered Users
|
I couldn't get yours to play, buffered for 5 minutes...
Here's mine from Saturday.. [ame]http://www.youtube.com/watch?v=vyXJZfiKewk&feature=g-upl&context=G25a06d1AUAAAAAAAAAA[/ame] Very sensitive in FBL manual mode...Locks in pretty good in Atti and GPS. Just had another thought...I have also been test flying a Twin, during initial test flight I had to add rear trim to get a stable hover. When I turned on the autopilot, it then began drifting to the rear... Do you have ANY trims, subtrims, anything in the radio that would be putting in inputs to the DJI?
__________________
Chris D. Bergen Bergen R/C Helicopters |
01-09-2012, 02:39 PM | #70 (permalink) |
Registered Users
Join Date: Mar 2006
|
Sorry..vid should work now.
I have no subtrims on or trims. I did the triming in the swashplate menu only to tidy up one servo which i couldnt mechanically get spot on due to the full turn on the links when only half is required. Looking at your vid now.. |
01-09-2012, 02:49 PM | #71 (permalink) |
Registered Users
|
To try and understand better what you are seeing...
As the wind blows, the nose is pitching up and down correct? But it IS holding position? Maybe with a vid a bit lower and closer would give a better perspective.
__________________
Chris D. Bergen Bergen R/C Helicopters |
01-09-2012, 03:23 PM | #72 (permalink) |
Registered Users
Join Date: Mar 2006
|
Its holding position better...still gets pushed around 1-2 meters...occasionally more almost 5m.
The nose pitch does bob up and down a fair bit with the wind. Roll sometimes gets a bit of a wobble on too. I will shoot another vid lower and closer next time. Hopefully will make it a bit clearer. Cheers for your help with this Chris |
01-09-2012, 03:50 PM | #73 (permalink) |
Registered Users
Join Date: May 2011
|
may I suggest a video from the heli itself with the gimbal gyros off? That would show any movement of the heli very clearly.
__________________
Diabolo: Scorpion 4530-540, MBeast V3, Edge 753 & 105, Powerjive 120 Trex 744: Wren turbine, savöx HV, JETI TX/RX, vstabi silverline |
01-09-2012, 03:55 PM | #74 (permalink) | |
Registered Users
Join Date: Aug 2010
|
Quote:
|
|
01-09-2012, 07:14 PM | #75 (permalink) |
Registered Users
Join Date: Mar 2006
|
I was filming as I shot that video from my phone.... I will upload it tomorrow as its HD will take some time to edit to a postable size....
|
01-10-2012, 02:55 AM | #76 (permalink) |
Registered Users
Join Date: May 2011
|
If you're using final cut, in compressor export as iPhone 4 format. That way it compresses it down a lot but still has a descent quality
__________________
Diabolo: Scorpion 4530-540, MBeast V3, Edge 753 & 105, Powerjive 120 Trex 744: Wren turbine, savöx HV, JETI TX/RX, vstabi silverline |
01-10-2012, 08:54 AM | #77 (permalink) |
Registered Users
Join Date: Mar 2006
|
Ok here it is... completely raw ... just downed the quality as it was lie 8 gig.
No stabalisation, no software, purely raw. No gimble on the ace one, no gyro or any other kind of stabalisation. If you dont like watching paint dry!!! at 3:35 & 7:50 mins you can see it happening. This is like only a light gust. top was 12km/h. [ame]http://www.youtube.com/watch?v=M_QKsrScSWU[/ame] |
01-10-2012, 12:03 PM | #78 (permalink) |
Registered Users
|
Something to consider...
You are flying in a 3-dimensional medium, the air. Because you have no physical attachment to something solid, like the ground, when the wind pushes against your heli, it WILL move. To correct this movement, the heli must change it's thrust vector, in the opposite direction of the force moving the heli (the wind). The way that a helicopter does this is to tilt it's rotor, since we use fairly rigid heads in our model helicopters, then the body/mechanics/fuselage must ALSO tilt. If the body/mechanics/fuselage tilt, so does the camera mount attached to it. This is the movement you are seeing. This is especially prevalent when the wind is gusting or not staying at a constant speed and direction. To add to this "problem" is the fact that a FBL head is being used on the helicopter. In this application you are relying on gyros mounted in those mechanics to "feel" movement, then and only then can those electronics input a command to counter this movement. Problem is, it's too late, the mechanics have already moved! Conversely, using a flybar, properly setup and mixed in the rotor head, inputs a corrective action in the rotor system BEFORE the movement is transmitted to the mechanics. So the mechanics will move LESS than in a similar FBL helicopter. My point madmcphil, is that this movement is NORMAL in this situation, it is the Ace One making corrective inputs to the wind gusts that have caused the heli to move, these inputs then also move the heli attempting to get it back to where it was. A heavier helicopter moves less in a given wind, having more mass, but once it DOES move, is harder to stop. This movement is why we gyro stabilize the camera mount itself, to counter the mechanics movements, but is still only going to work to a certain point, those VERY windy days will mean postponing the shoot for calmer weather. This is my uneducated assessment....
__________________
Chris D. Bergen Bergen R/C Helicopters |
01-10-2012, 12:31 PM | #79 (permalink) |
Registered Users
Join Date: Aug 2010
|
It would be interesting to know how much experience these DJI users actually have before they started having problems with this flight stabilizer. On one hand I see Chris's point that all FBL controllers do this to some extent, but on the other hand we've seen plenty of seemingly very experienced pilots have these exact same types of problems in the setup and tuning.
|
01-10-2012, 02:48 PM | #80 (permalink) |
Registered Users
Join Date: Mar 2006
|
Understand what your saying Chris and Im partly in agreement with you. My issue really is the way the Ace One is responding to these gusts. I have seen many a flybarless heli (maxi joker, trex 700, and simailar helis to mine) on youtube react much better and hold a less aggressive but more stable hover. Im sure its down to the settings which I, the end user, is not getting right. 12Km/h winds shouldnt move the heli as much as it is with mine. Even on my old flybarless unit it would be more weather friendly than this in attitude mode. (HC3SX)
Understanding the physics behind it... yes I hole heartidly agree with you...but the DJI Ace One is capable of more... I just got to figure out where Im going wrong and why the settings are just not dialing in for me. I still dont get any 5-10hz oscillations even with my gains up at 300% in a hover. So I dont have a guideline to back of from. Its all very strange. Wrote to DJI about it many a time. Not getting any further with them either. Bit of a language barrier I feel. With reference to HogFarmer.... Yep... these DJI units make me feel like a beginner again. I have been flying around 8 years now. Although I admit only a year with flybarless. From one of Chrises Bergens, GSR260's, Raptors, and this logo is my first electrical. Flew great with the HC3SX.... but this Ace One is melting my noodle. If only someone else with a logo600se would chime in! At least I could have a reference. Cheers Chaps. Last edited by madmcphil; 01-10-2012 at 03:27 PM.. Reason: holy crap did the math...im getting old... flown for over 10 years now |
Thread Tools | |
Display Modes | |
|
|