dca386da

PID: SoupGate-Win32 v1.05
On 21/12/2018 21:17, D.M. Procida wrote:
> I'm fairly new to servos.
>
> I see that they come in two basic types: continuous rotation (their
> speed of rotation is determined by the pulse width) and fixed travel
> (usually 180 degrees, sometimes a bit more).

270 degrees actually.

>
> They come in various standard (not sure how standard these actually are)
> sizes - micro, sub-micro, standard.
>
> And they can have plastic or metal gears.
>
> What else should one be aware of? I have an application in which I'd
> like reasonable accuracy and precision, and for a 5-degree command (say)
> to have a 5-degree output.

Mmm. Most RC transmitters have non linear lookup tables so that is
almost impossible to achive.

I would try a quality metal geared servo, of soem size, as some have
twin gears spring loaded together to minimise backlash.

And asking somewhere else.

Like the RCgroups international forum which has a spot dedicated to servos.


https://www.rcgroups.com/radios-135/

Cost nothing to register and post.


>
> I've been fooling around with a pair of HiTec HS-55s - they're OK, but
> they are not what I'd call precise. One of them also takes the slightest
> excuse not to respond (possibly my abuse has damaged it).
>
Mm. I used thema lot - and there are a lot of fake ones out there - for
light weight  but precision they are not. Try something with a bigger
pot in it like and HS85MG or somesuch]

> If I wanted something stronger and more accurate, and don't need more
> speed, what sort of thing should I be looking at?
>
First go bigger. Then look for moulded carbon track pots. Also some
'digital' servos are better than the so called analogue ones for
resolution (both are a mixture of both, but that's marketing).



> Thanks,
>
> Daniele
>


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