I just spotted on RCTimer's new items page a new brushless motor for gimbals - GBM5208-SR.
What's good about it is that instead of normal shaft it has a tube shaft with a 12.7mm hole, they include a Slip Ring of the same size with it, this makes it easy to rotate 360° in all axis, for most people 360° rotation on the yaw should be enough. Also, due to the big shaft/tube size, i suppose the motor should be stronger, with a shaft like this and those big bearings applying direct weight to the motor should be no problem.
I already build a 3 axis gimbal for my Canon EOS M with the 4114 motors, now it's time to start prototyping Version 2.
My plans are to make it rotate in all 3 axis using the slip rings, they have 12 wires, which is enough for my project.
Here are some details:
IMU - 4 wires
IR Remote Switch - 3 wires
Video Out - 2 wires
- Sharing GND and 5V it will be reduced to 6 wires only.
Pitch Motor - 3 wires
IMU + IR + VID - 6 wires
- So i use 6 wires for the IMU, IR and VID, i still have 6 wires left for the pitch motor, the slip ring is rated at 2A per wire, with the 6 wires i'll connect them in pairs to the motor, which i believe should give enough power to the motor.
- This axis will hold the Controller Board and an Sbus Decoder. I don't want to add more weight so i'll use power from Aircraft main Lipo.
- With the Sbus decoder i will only need to pass 4 wires to the aircraft, which are GND, 12V POWER, VIDEO, SBUS SIGNAL. 2 wires for Sbus and Video, which leaves 10 wires, 5 wires for GND and another 5 for 12V should be ok i think.
- Yaw Motor and Roll Motor don't need the slip ring, since their leads are in the same axis, so i just can connect them directly to the Controller Board.
I can't wait to start this project, what do you guys think? Cheers!