[edit 30-12-2012: added side view of the pan tilt construction (it looks too small for it is not scaled ) and changed trackballs on remote to thumbsticks . ]
Hello there and nice to meet you,
lately I've been looking into a lot of arduino videos on yt and I think this platform is the key to realize the following project:
A super smooth pan/tilt head that is remotely controlled and able to record and accurately reproduce all (motor) movements.
It should be as light weight, energy efficient, silent and cheap as possible
Since I am a noob in robotics and programming I'm hoping you can help me a bit.
This is what I have in mind for the hardware setup:
The part of the setup that has to be moved weighs 2.5 Kg.
Used for filming with a magnification up to 200x movement it should be really smooth and accurate.
All motors have a different task;
-The Tilt motor has to be the strongest and must have sufficient holding power, I'm not sure about the belt drive but I figure it
filters out vibration a bit and enables the motor to sit in the centre of the setup.
-The pan motor doesn't have to be as strong as the tilt motor but it should be relatively fast.
-The focus motor should be small but strong enough and doesn't have to be fast.
-The zoom motor should be really small but doesn't have to be strong or fast.What motor is most efficient/suitable for what task (type, specs)
I also need a small actuator or something that can physically push the record button on my camera.What can I use for that ?
A 9DOF IMU should be the main reference for the whole system so there is no chance of drift.Is the latency low enough, is it accurate enough, what is the best sensor ? Should I have motors for pan/tilt with a hall sensor build in and use the IMU signal for PID to correct the motor movement ?
Battery and processing module are mounted on the tripod and wired to the motors, actuator and sensor.
The arduino due seems to be the best choise, more processing power and less voltage. What is the best arduino, motordriver and battery ?
(I hear dewalt batteries are used for medical field use röntgen applications. )
The other part is a remote control:
The remote is wired to the arduino and the 2 cameras. It has it's own battery pack.
A trackball (2 rotary encoders in one knob ) and a potentiometer (controlled by a game controller like trigger ) to control the direction and speed of the motors seems to be ideal for precision operation.
I have a 7" video monitor that has an HDMI input (connects to the main camera) but I would like to have a tablet pc with an HDMI input ... but there seem to be no tablets with that option .. Is there a way to "hack" a tablet computer to have a hdmi input ? (have touch screen and run a program) Should I stick with the monitor I have and make the arduino display an onscreen menu via hdmi or composit video ?
Your feedback is very much appreciated.