This is main board normally put on Gimbal frame near the Quad .
This is the two options imu available normally is on camera module:
2 axis with 3 accelerometer and 3 gyroscope 3 magnetometer in one version we use mpu6050 and in other we use mpu 9150 1 chip 9 DOF sensor.
Some friends start to design different kind of gimbal for our new board. The main difference respect of standard gimbal is that the mechanical frame need to be develop for each video sensor that you would like to use for your video. This frame is for Gopro Hero 2-3 in the design is important to move CG of camera for obtain better result during gimbal stabilization :)
This is the caratheristics of our : VR Gimbal :
Micro Controller is STM32F1 at 72 mhz.
3 Axis Brushless Direct Drive gimbal :
- Roll (MOT1)
- Pitch (MOT2)
- Yaw (MOT3)
For each channel we have 3 high power pwm output .
I2C IMU that support 3 axis . It is on camera module , so we can know exactly the position of camera and control in realtime the 3 Brushless motors.
We are developing two option :
- more traditional approach : MPU6050 (6 DOF) + HMC5883 (3 DOF)
- new sensor from inversense MPU 9150 (9 DOF)
1 USB port.
1 Serial port that support mavlink protocol.
1 Power module that support until 3S battery.
4 Radio RC Input for :
- Control ROLL Setup.
- Control Pitch Setup.
- Control YAW Setup.
- IR control repeater.
4 Analog Input 0-3.3v
1 IR Out , so is pssible to control a remote camera by its ir receiver.
The first batch of production will be available in 3 week it's better to reserve your board because there is a big request of this gimbal.
for more info send a mail to info@virtualrobotix.com
original blog post : http://www.virtualrobotix.com/profiles/blogs/vr-gimbal-is-coming
Best
Roberto Navoni
Comments
@Para, I did use that kind of slip rings in the past for an other project, and there is notting wrong with them, they are really good. Despite to what someone says, If you stay below a certain limit of RPM (in my case 50) you can transmit serial+power+usb without any noise.
I will definitely prefer the solution with slip rings instead of adding an other Rc receiver onboard, or wireless connection.
Hi Giovanni, I'd like to get in touch with you and get some feedback from a real movie guy. PM sent. Cheers, Florian
@Olivier, a true 3-axis gimbal can use one of these for communication:
http://www.adafruit.com/products/736
My 2-axis AlexMos gimbal with 5010s and a Sony CX-740 Handycam tops at 1.2A on 4S, but for safety one can go 2xVCC, 2xGND, RX, TX on the 6 wires.
@Roberto: mark me as definitely interested. Will email soon.
Roberto, would be nice to have a RC mode input, so that we can choose between different modes :
- freewheeling (for gimbal balancing for example)
- 2 axis stabilisation
- 3 axis stabilisation
It is important to be able to switch to 2 axis stabilisation when there is a single pilot.
A 5V output could be nice so that we can connect a 3DR radio module for linking with the main APM (GPS coordinates transfert for centripetal corrections and target lock data).
As you know on a true 3 axis gimbal you cannot use wires between the frame and the gimbal axis.
Olivier
Very stable. nice system
Very nice Roberto, would be important to get GPS Data from the main APM so that you can compute centripetal force correction to avoid bad horizon during fast turns.
I would suggest to add a 3DR radio receiver on the gimbal so that you can get GPS and target lock data through Mavlink without wires. This is important for a 3 axis setup.
Olivier
Email sent.
Roberto: I'm stoked to see what you guys come up with.