gimbal servo voltage

First off, I confess that I am not as technically savvy as any of you.

I am trying to get my 2 axis gimbal to operate correctly.  I am controlling it with a DJI Naza.  I am using the F1 and F2 outputs to control the pitch and roll.  The problem is the servos do not stop once they get going in a particular direction.  If I tilt the copter sideways, the gimbal will start rotating to correct for the motion, but rather than just correct, it continues to rotate until I tilt the copter in the opposite direction. same is true for the pitch.  Also, I have the manual pitch adjustment controlled by my VR dial on my Futaba 8J radio.  Rather than just move the gimbal pitch incrementally based on the dial motion, it initiates motion in the direction of the dial.  If I move the dial slightly, the gimbal goes in that direction, but rather than move a bit and stop, it just keeps going until i turn the dial in the opposite direction.

I have tried different end point and gain values in the setup software with no success.  I am wondering if my problem lies in too much voltage going to the gimbal servos.  I have an 11.1v lipo feeding the Naza, and I pulled up the spec sheet on the servos and their operating range is 4.8-6v.  Is it possible that I am sending too much voltage to the servos, or is it fair to assume that the NAZA controller automatically drops the voltage down on the F1 and F2 outputs?

Any help or links to help would be greatly appreciated.

3690992326?profile=original

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Replies

  • Developer

    Barry,

    It sounds like the flight controller is expecting standard fixed rotation servos and is outputting a constant value for the set point. Most gimbals are configured to operate this way. In other words, if you rotate the copter to the right, the flight controller is telling the gimbal to rotate left at, lets say, and arbitrary value of 95. Now as long as you are holding the copter to the right, that 95 value is getting sent to the servo. On standard servos this is not a problem because 95 corresponds with an angle. On continuous rotation servos, 95 is the speed at which the servo rotates. So you can see, on your setup that 95 value will just cause the servo to rotate and never stop until the copter is level again at which point the flight controller outputs 0 again.

    I hope this helps you understand the problem. I do not have a solution for you because I do not have much hands on time with the Naza. They have a configuration to account for the different kind of servo you have. What you would want is the flight controller to output a value that is related to the rate of rotation instead of the angle. 

    Cheers,

    Adam

This reply was deleted.

Activity

DIY Robocars via Twitter
RT @donkey_car: Human-scale Donkey Car! Hope this makes it to a @diyrobocars race https://www.youtube.com/watch?v=ZMaf031U8jg
Jun 25
DIY Robocars via Twitter
Jun 25
DIY Robocars via Twitter
Jun 16
DIY Robocars via Twitter
RT @GrantEMoe: I won my first @diyrobocars @donkey_car virtual race! Many thanks to @chr1sa @EllerbachMaxime @tawnkramer and everyone who m…
Jun 13
DIY Robocars via Twitter
RT @gclue_akira: JetRacerで自動走行したコースを、InstantNeRFで再構築。データセットは別々に収集 #jetracer #instantNeRT https://t.co/T8zjg3MFyO
Jun 13
DIY Robocars via Twitter
RT @SmallpixelCar: SPC 3.0 Now the motor also works. This car is doable. I just need to design a deck to mount my compute and sensors. http…
Jun 13
DIY Robocars via Twitter
RT @SmallpixelCar: My new car SPC 3.0. https://t.co/CKtkZOxeNQ
Jun 7
DIY Robocars via Twitter
RT @SmallpixelCar: High speed at @diyrobocars thanks @EdwardM26321707 for sharing the video https://t.co/o4317Y2U1S
Jun 7
DIY Robocars via Twitter
RT @SmallpixelCar: Today at @RAMS_RC_Club for @diyrobocars. Used @emlid RTK GPS and @adafruit @BoschGlobal IMU. Lap time 28s https://t.co/R…
May 28
DIY Robocars via Twitter
May 15
DIY Robocars via Twitter
May 14
DIY Robocars via Twitter
May 13
DIY Robocars via Twitter
RT @f1tenth: Say hi to our newest #F1TENTH creation for @ieee_ras_icra next week in Philly. It’s going to be huge! 😎 🔥 @AutowareFdn @PennEn…
May 13
DIY Robocars via Twitter
May 11
DIY Robocars via Twitter
May 8
DIY Robocars via Twitter
RT @SmallpixelCar: Noticed my car zigzagged in last run. It turned out to be the grass stuck in the wheel and made the odometry less accura…
May 8
More…