Fredrik , får du nå mkt vibrationer från tilten? Tar man på motorn så försvinner det....
Här har du en bra guide för att ställa in gimbalen.
First of all, use the board as standalone ( don't hook up a transmitter or flight controller for the settings).
Make sure to upload a firmware in the unit ( version 1.0 or the latest 1.3, just make sure to take also the GUI that has the same revision number).
Also, make sure to have an external power supply ( lipo , dc power supply...) at all time. do NOT leave the USB cable connected to computer without the additional power supply hooked up onthe board when motors are connected as the USB port might just get disabled by windows or Mac Os if the current requested is too high in that particular case)
Then put the following values for each motor for starting the settings :
Roll : Proportional at 15 / Integral at 0.20 / Derivative at 10 and power at 100
Pitch : Proportional at 4 / Integral at 0.20 / derivative at 5 / power at 80
Indicate manualy the number of magnets, write the values and then proceed to the calibration of the IMU.
Make sure that the gimbal is perfectly balanced. If not, no need to move to the next steps, it will just not work ( especially on the roll). Also make sure there is not hard point or whatever that could bother the motors job.
Once done, your board will reboot and after a few seconds ( make sure IMU does not move during boot sequence), your motors will start to move, correctly, or not..
You need to onserve the behaviour of the motors and gimbal first of all to know how to proceed then. Each behaviour " sign" is a helper for you
The reason why we put a bigger startup gain and a bit more power on the roll is for a valid reason, the roll is much harder to control for the motor. This is also why we put a bit more of power ( much more inertia on the roll on a go pro gimbal).
Now, let's see what we can have :
1) The gimbal is moving from one direction to another, and is " chewy" (it makes some kind of ondulations) : Proportional gain is too low. Rise it a bit, you will see that at some stages the gimbal will start to move like if it had some bit steps and then it should come to a behaviour that starts to look like something ( lol ).
2) Once you have something pretty decent on the position holding,the motors can vibrate / oscilate : If it oscilate, you need to reduce the I gain. If it vibrates ( kind of jittering), you need to lower the D gain. If you proceed step b step ( don't forget to write the values each time you change them), the gimbal should finaly be able to stay in position.
3) Now that the gimbal is keeping it's horizon( if you have violent shaking / jitter during the setup you will need either to reboot or to recalibrate and too violent moves will simply bring the IMU values to drift away..), its time to fine tune.
4) On the pitch axis, give a small light pinch to the camera / pitch with a finger. If the camera comes back veryyyyyy slow, you need to rise a bit the I gain. After some time, it will come back to position faster, and now you need to check the D gain: if when it comes back to position it " searches " for fixing the position by oscillating like a spring, you need to reduce the D gain. If it comes back and reduces spped to much and get on position, then rise the D gain a little. Once done and with good resutls, you can finalise fine tuning with Proportional and power. But each time you will play with the Power value,you will need to fine tune as more power = more rectivity = more disturbances in the IMU = more reaction.. Just repeat the procedure since step 2. It is not necessary to put to much power, or motor will just heat up. The best is to keep as low value as possible with the camera keeping it's position when moving the gimbal on smooth moves. If it is well balanced, it will accept even some fast moves...
5) Roll axis: that one is the worse to setup, because the axis is underpowered compared to the pitch, when using same motors. But this won't avoid it to work OK once it's setup.
Proceed with the same method as pitch, but you must kep in mind that back to neutral when giving a small pinch to roll will be much slower than the pitch, which is normal due to the additional inertia. With a more powerful motor, P gain will be much smaller and come close to pitch P gain .
The values changes are much more sensitive because of this additional torque " drain". On Roll, it is common to get some values like 120 on power due with 22 to 25mm stator diameters.
Finally, once all will be setup, check the graphs of the IMU in the GUI. the Roll and Pitch Gyro and Accelerometers lines must be all in the same height or very close, and disturbances must be minimal ( check attached picture). If you see some pikes, there is too much I or D gain somewhere cuasing mini jittering ( start with the D and reduce a bit, then the I).
Once done, it's time to fit the gimbal ont the frames and get a flight.
Do not forget that the principle of a simple direct drive motor is to keep the gimbal in a state of self balance all time. This is why perfect CG /rotation centers are so essential, as long as you don't have a decent mechanical behaviour, just forget about rushing in the settings. The more time you wil spend to have effortless movement onthe gimbal and perfect centerings / cg's, the best the gimbal will work. It is absolutly normal to have the gimbal getting back slowly to neutal on roll after a forced "hand" input ( it's a bit faster on pitch). That kind of thing will NOT happen in flight except if you fly with a crap or wrongly setup machine
Testat lite fram och tillbaka med inställningar, nu kan man nog testflyga.
Nu sitter den på hexan efter lite småstrul....
Ut å fly så vi får se resultater...
Min er bestilt
Med vennlig hilsen
Alf W. Hansen
Vill köpa en sån! Men du verkar ha tomt på lagret, Fredrik.......
Jag förstår inte skillnaden mellan gimbalpaketet med 4006 och 4008 motorerna (förutom de uppenbara skillnaderna i databladet förstås). Det står ju att de hanterar samma kameravikt på båda paketen men med olika kameror. Jag vet inte skillnaden på kamerorna men hanterar 4006rna upp till 800 gram också så beställer jag nog en sådan.