[chbot] Discrete servos

[Mark Atherton]

More info about the load please.

Size, weight, expected rotational velocity, supply voltage, acceptable 
control interfaces...

-Mark

On 1/12/2016 12:52 PM, Robin Gilks wrote:
> Greetings all
>
> As usual, I'm building something and I can't seem to find what I want off
> the shelf. Think pan head for CCTV system.
>
> I can get really cheap ones from AliExpress but they are just about all
> Pelco-D controlled which allows pan direction and speed and not actual
> proportional control. They are also very slow, taking some 20-30 seconds
> for their full range of movement.
>
> A standard rc servo isn't going to be up to the job although the API
> (pulse position) would suit, I'm thinking 12v or 24v DC motor, H-bridge,
> gearing, feedback pot and control circuitry. Its the last where I can't
> get it off the shelf as the industry standard M51660L is 5v only.
>
> Any ideas what would be best to start from such that the mechanics can be
> easily adapted with some sort of discrete controller for the proportional
> bit?
>
> Thanks
>