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10-17-2016, 12:22 PM | #1 (permalink) |
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Join Date: Mar 2013
Location: Cleveland, Ohio
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Developer Tab - Tuning Cyclic PID's
Hello,
Cyclic Gains in Robird Anyone have experience tuning the cyclic PID's for the G31 in the developer tab? I a flying unit currently mounted on a Protos 500 with Castle Gov Set RPM, standard Protos 500- 16mm servo arm ball link to center distances and trying to get the head to stay locked in. Can not seem to get gains high enough for the cyclic to bobble. I have the pots set to 12 o'clock (max). I had a more experienced pilot fly the model and they recommended tuning the cyclic gains up or change the mechanical gain (ball link to servo center). The unit flys OK for sport use (circuits, loops, rolls); just difficult to progress to 3D flight with the model... i'm trying to tune it to fly like the simulator. Any help is appreciated. FWIW I'm flying a ikon on a second Protos 500 that tunes much easier and fly's "locked in" like the sim. I just dont want to necessarily throw the Robird away for lack of system understanding. Thanks, Greg
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10-17-2016, 04:52 PM | #2 (permalink) |
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Thread Starter
Join Date: Mar 2013
Location: Cleveland, Ohio
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Cryptography: What does _maxICyc, _uniteGyro, et al mean?
Dear Robird Experts: (I tried to PM Ah Chem, but the inbox is full)
You wouldn't happen to know if there's some more detailed explanation regarding the developer tab of the Robird software? Anyone have a primer on some of the parameters used... I'm guessing on most. I'm struggling to find the right cyclic gains and unsure what interactions occur in some of the cryptic parameters. I've been slowing increasing the _swashGyroPidele & _swashGyroPidail group, P gains only at first and then a small d gain, but I'm not seeing much difference in how the unit flys... The Robird does load / save & retain the values I change Ok... just not sure if I need to look at _uniteGyro and _swashGyroArgsail:_maxIcyc I had a more experience 3d pilot fly my Protos 500 and he said the cyclic gains are too low, the feel was "loose" too much drift in heavy cyclic maneuvers. I know you switched to Spartan over a year ago... was hoping you might recall something usefull. BTW, I've done the Robird mechanical setup with the software following the instructions/ cyclic geometry is in the green range according to the software. I have an ikon on another P500 and that FBL unit seems to tune much easier without the cryptographic parameters... everything is explained in a help box. Thanks in advance! Regards, Greg
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10-17-2016, 06:14 PM | #3 (permalink) |
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Thread Starter
Join Date: Mar 2013
Location: Cleveland, Ohio
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Getting closer... I think.
I got bold and jacked the cyclic gains way way up until bobble started... default values were 550 on P gains, I'm at 2500 now on the elevator and 1000 on aileron (2000 was too high for the aileron and backed down to 1000 after three test flights). The pots on the Robird are now set at 6 O'clock (mid position) on the aileron and 8 O'clock on the elevator.
Didnt break anything yet. Just surprised how high I had to go. Maybe I need to look elsewhere for generic or general FBL system tuning. At least I'm more locked in now. Now just need a good pilot to tell me how well I tuned the bird.
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10-26-2016, 08:51 PM | #4 (permalink) |
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Thread Starter
Join Date: Mar 2013
Location: Cleveland, Ohio
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Got help from RCHN
Reviewing the RCHN podcasts episodes 133 and 134 on PID tuning and test methods for the first few flights
I'm getting better results now. Turned off pre-comps, cyclic stops and pitch comps all to zero first and then tuned the main cyclic gains. Tail is holding great with default PID settings. Just set right stops one point higher than left. Default sport settings for rates and agility. Setup remote gains in the radio so I can adjust and see the results during the flights. Set the gains into 3 flight mode banks. Still learning and not crashing!
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cyclic gains in robird, dev, developer tab |
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