Digital vs. Analog Servos

[RCdiy]

Could you point me to some good webpages/videos that explain:
- the differences between digital and analog servos
- when to use each kind
- differences in how to use each kind (for example I've seen reference to changing parameters on a receiver depending on servos used)
- pros, cons
- figuring out if a servo is analog or digital (phisical markings, twitchy behaviour/sounds when connected...)

 

[Konrad]

Most servo OEMs and retailers have a FAQ that address most of these question.
I assume you know this, so I'm not clear as to what you want to do with this.
https://www.servocity.com/digital-servo-faqs

Could you point me to some good webpages/videos that explain:
- the differences between digital and analog servos
Uses binary code in place of pulse width or voltage level to position output
- when to use each kind
Digital when one wants power and speed (as a result of the refresh rate the servo amp can respond to the input or output changes much faster. Most RC analog signals are clocked at a slow 20 milliseconds) Gyros are a good case for digital servos.
- differences in how to use each kind (for example I've seen reference to changing parameters on a receiver depending on servos used) See above, I thnk you are referencing RX refresh speeds
- pros, cons
Digital Cons: power demand goes up in relation the refresh rate. Oh but what benefits, speed power and precision!
- figuring out if a servo is analog or digital (physical markings, twitchy behavior/sounds when connected...)
No industry standard as to marking. If refresh rate is slow enough, in the human auditory range, one might hear a high pitched whine

All the best,
Konrad

 

[Wayne]

Interesting question. Is there a way to tell if a servo is digital or analog just by looking at it, and not the number on it.. LOL Not that I am aware of. A servo with a small deadband of 1 or so will for sure make plenty of noise trying to maintain a perfect centering. This is typically what people are talking about with the noise from digitals. The digital servo is much strong in this area, thus more noise.