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04-12-2014, 12:18 AM | #1 (permalink) |
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Wookong-M Losing Yaw Control***PROBLEM SOLVED MUST READ***
********GO TO MY LAST PROBLEM SOLVED POST******
I'm setting up an fresh 680 hexa for a friend with brand new Wookong-M. Has been upgraded to the 5.26 firmware successfully...This is not my first setup, and have set up about 6 wookong-m before, this is the first of this problem though. At first, for the first couple flights everything was fine with all the gains and controls and switches. After that, the hexa slowly started losing yaw control after about 1 minute into flight. Tilt and Roll keep working fine, it will slowly lose all yaw control completely and then it regains it back, but not very responsive, then loses it again. Let me tell you its a pretty scary thing when you lose yaw control.. I have even replaced the gps compass and it still has the same exact issue. Could it just be a bad IMU? I'll have to study the LED lights for codes. Or did I just experienced my first DJI hardware malfunction? Where have I been?
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"Whats Right is Right and Whats Wrong is Not Flying" 600EFL,Vbar,BLS251&451,12s,Sahara reg 7.4 ion,Maverikk blades. x2 Align 700e & 700n, Futaba, Align servos, Vbar, Helicom x 3 Align 600n, 600ePro, esp. Radix,Mavrikk,Align Blades. Last edited by ShankBones; 04-23-2014 at 09:57 PM.. |
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04-12-2014, 07:55 AM | #2 (permalink) |
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That would be my guess is that the IMU is bad. You had a replacement GPS. Do you have an IMU that you can swap in? Depends will solve the other problem.
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04-12-2014, 12:45 PM | #3 (permalink) |
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It would make sense that the IMU would be the culprit, although I don't have and extra IMU I can afford to let go at the moment. I was hoping on wishful thinking that someone would have had the same issue resolved.
I really don't think the master controller is bad either, it clearly shows the upgrade installed correctly, plus in the assistant software shows all controls working at all time..
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"Whats Right is Right and Whats Wrong is Not Flying" 600EFL,Vbar,BLS251&451,12s,Sahara reg 7.4 ion,Maverikk blades. x2 Align 700e & 700n, Futaba, Align servos, Vbar, Helicom x 3 Align 600n, 600ePro, esp. Radix,Mavrikk,Align Blades. |
04-14-2014, 07:59 AM | #4 (permalink) |
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Update....What Next?
Thought I would share an update.
So far I have swapped out and replaced the IMU from one of my units and still have the same exact issue losing yaw control... I even went as far as to swap out and replace the Futaba 8fg transmitter and receiver and re-calibrated the TX in the software, still have the problem. What's left to swap out? MC, esc, motor or program esc? Esc's installed: "Platinum-30A-Pro OPTO ESC for Multicopter on 4S" Motors installed: "4010 380KV Multi-copter Outrunner Brushless Motor" 12x3.8 CF Props...
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"Whats Right is Right and Whats Wrong is Not Flying" 600EFL,Vbar,BLS251&451,12s,Sahara reg 7.4 ion,Maverikk blades. x2 Align 700e & 700n, Futaba, Align servos, Vbar, Helicom x 3 Align 600n, 600ePro, esp. Radix,Mavrikk,Align Blades. Last edited by ShankBones; 04-15-2014 at 11:59 PM.. |
04-15-2014, 03:51 PM | #6 (permalink) |
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Sounds to me like one of the motors is slowing, losing the torque. Decide which direction the aircraft is rotating, then you only have 3 motors/ESC's to test...
A loose motor/vibrating motor can also cause a yawing movement, as could an unbalanced prop. Also verify that all 6 motors are absolutely straight up and down.
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Chris D. Bergen Bergen R/C Helicopters |
04-15-2014, 11:54 PM | #7 (permalink) |
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Wookong-M Losing Complete Yaw Control
Sorry guys,...But my description was incorrect, I had posted Loose and it should have been Lose......
What I'm getting is complete Loss of yaw control. Although I do have complete pitch and roll at all times, its only the yaw that loses input after 20 to 30 seconds into the hover, and then it regains it back, but not very responsive, then loses it again. this happens off and on for the rest of the hover. When I do lose yaw, I can have the TX rudder stick all the way right or left and I get no yaw response. Keep in mind that this is a fresh build and in the first 3 maiden flights everything was working perfect.. It was shortly after that when this issue started happening. I'm not really seeing nor feeling vibration on the props, they are balanced. (1) I can try to change out a new set of APC props (2) I can try to swap out the MC from one my other units. (3) I can try to ck programing on the esc's (4) What's left after that? change out plastic zip ties?
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"Whats Right is Right and Whats Wrong is Not Flying" 600EFL,Vbar,BLS251&451,12s,Sahara reg 7.4 ion,Maverikk blades. x2 Align 700e & 700n, Futaba, Align servos, Vbar, Helicom x 3 Align 600n, 600ePro, esp. Radix,Mavrikk,Align Blades. Last edited by ShankBones; 04-16-2014 at 04:08 AM.. |
04-16-2014, 11:19 AM | #8 (permalink) |
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Where is the compass puck located on the aircraft?
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Chris D. Bergen Bergen R/C Helicopters |
04-16-2014, 02:44 PM | #9 (permalink) |
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ShankBones, I had a simular issue with an 800 hex. my fix was I went to a larger prop. I had 13 x5.5 went to a 15x5.5 the yaw issue went completely away. The only difference I was using a Naza V2 w/GPS - 5010 - 360 kv motors with ztw spider 40a simonk esc.
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04-16-2014, 10:58 PM | #10 (permalink) | |
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Quote:
The IMU is perfect center all @ 0,0,0, I have to say that this compass position is the same exact as two other airframe units I have. The only difference is the motors/esc's and props.
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"Whats Right is Right and Whats Wrong is Not Flying" 600EFL,Vbar,BLS251&451,12s,Sahara reg 7.4 ion,Maverikk blades. x2 Align 700e & 700n, Futaba, Align servos, Vbar, Helicom x 3 Align 600n, 600ePro, esp. Radix,Mavrikk,Align Blades. |
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04-16-2014, 11:16 PM | #11 (permalink) |
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Update
Welp, now I have changed out the MC and I got the same issue all over again.
Process of elimination, now I know this issue has nothing to do with any of the DJI hardware components, nor the Futaba receiver/transmitter. Txrk103, thanks you may be right.. I could change out the props. It currently has 12x3.8 carbon fiber props....I can only max out the prop length to 12" (possibly 13") on this 680 hexa airframe...The only thing I can do is maybe up the pitch from minimum 12x4.8 to maximum 12x6 on these 4010-380kv motors. Programing the sec's (Platinum-30A-Pro OPTO ESC for Multicopter on 4S) could be the next thing to do.... What ever it is, I need to go back to having fun.. Thanks again guys for all your advise. ShankBones
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"Whats Right is Right and Whats Wrong is Not Flying" 600EFL,Vbar,BLS251&451,12s,Sahara reg 7.4 ion,Maverikk blades. x2 Align 700e & 700n, Futaba, Align servos, Vbar, Helicom x 3 Align 600n, 600ePro, esp. Radix,Mavrikk,Align Blades. Last edited by ShankBones; 04-17-2014 at 10:17 PM.. |
04-23-2014, 09:45 PM | #12 (permalink) |
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!!PROBLEM SOLVED!!
!!PROBLEM SOLVED!!
Ok, live and learn. Major oversight on my part. Simple rule bottom line, the 12x3.8 CF props did not have enough rpm authority to hold yaw control. The MC unit must have been working overtime trying to compensate for lack of authority. As it turns out the 4010 380kv motors perform better on 6s, also lower amp draw, I was using 4s. All I did was run the hexa 680 rig on 6s, and WahLah!! All is running perfect after a few gain adjustment to compensate the higher rpm change. I have been breaking my head battling this for 2 weeks. All along it was simple. Thanks again for all you guys help, and hope someone can use this info in the future. ShankBones
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"Whats Right is Right and Whats Wrong is Not Flying" 600EFL,Vbar,BLS251&451,12s,Sahara reg 7.4 ion,Maverikk blades. x2 Align 700e & 700n, Futaba, Align servos, Vbar, Helicom x 3 Align 600n, 600ePro, esp. Radix,Mavrikk,Align Blades. |
04-24-2014, 10:21 AM | #13 (permalink) |
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Be sure to change to 6s on the voltage page in the assistant program. Glad you figured it out!!
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Chris D. Bergen Bergen R/C Helicopters |
07-21-2014, 05:05 PM | #14 (permalink) |
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If this works i will be werry happy.
Have been strugling with a large quad for some time, and getting tired of breaking expensive 17" inchers. One question, is there any database somewhere for rough starter gains targeted to weight for the naza/wookong? |
07-22-2014, 02:52 PM | #15 (permalink) |
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The Naza is not recommended for larger birds.
For gain suggestions with WKM or A2, I'd suggest similar gains used for the s800 or s1000, as noted in their instruction manuals.
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Chris D. Bergen Bergen R/C Helicopters |
07-22-2014, 06:19 PM | #16 (permalink) |
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So i could start with gains from these with a quad?
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07-23-2014, 10:45 AM | #17 (permalink) |
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Yes. As a starting point. Only you can identify what will need to be adjusted after you get it in the air.
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Chris D. Bergen Bergen R/C Helicopters |
07-23-2014, 03:56 PM | #18 (permalink) |
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Well i guess size and weight are both part of the gain equation right?
So it cant be that far off considering im werry close to an s800 I couldnt fint any gains in the s800/1000 manual but in the wookong manual there is one for 800 series. Question then is are these for the latest firmware? |
01-26-2015, 08:33 AM | #19 (permalink) |
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No YAW
Hello everybody yesterday I try to fly for first time my new setup and I had big YAW problem , no YAW actually
My setup Tarot T18 Esc s : KDEXF-UAS35 Motors : KDE4012XF-400 Propellers: tarot 1855 Wookong m Futaba t8j 22.2 6 cell batteries onece per flight . The octocopter it was almost out of control ... It was ready to take of at 40% of stick and it start to yawning by it self ... My ex octocopter was ironman 1000 with tarot motors and 1555 propellers , and the same wkm with no problem ... Do you think it may be the problem ? I have to change to 1555 propellers again ? |
02-01-2015, 11:59 AM | #20 (permalink) |
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How much does your aircraft weigh?
If it is taking off at 40% throttle, the RPM of those big props may not be spinning fast enough, and aren't able to speed up and slow down fast enough to control yaw. Just a Guess...
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Chris D. Bergen Bergen R/C Helicopters |
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