digital servo's

[Tim Davies]

hello,is it true that digital servo''s have about twice the torque of ordinary servos''s(for the same physical size and sec/60 degree),and if so, how do they achieve this. thanks in advance regards tim

[Jonathan Lewzey]

It depends mainly on size of servo, but i don't think this is correct. Digital servos check their position much more frequently than analogue ones and are therefore faster and more precise. Torque is only affected by gearing and power output of the motor?

[birdy]

Not true. Whilst analogue servos use a pot to measure their position, digital ones er... use a digital thing, which is more accurate. Hence why we not all high torque serovs are digital!

[Frank Skilbeck]

Isn't it also that the torque on analogue servo's drops off as it nears position whereas digital servos keep a fairly constant torque until the required position is achieved.

[birdy]

Not sure, but I think analogue is "that'll do", and digital is "Oh my god its not perfect. move now!!!"

[Jonathan Lewzey]

Posted by birdy on 08/03/2010 22:37:07:
Not sure, but I think analogue is "that'll do", and digital is "Oh my god its not perfect. move now!!!"

 lol, i like this explanation . IMO you only need digis for aerobatics and 3D helis etc.

[Clive Matthews]

This is serious nit picking and doesn't really relate to the 'are digital servos better than analogue ones' debate, but;

 

As a rule analogue by definition gives a more accurate resolution than digital. Using a sine wave as an example, analogue would be any point along the curve whereas digital is a series of sample points along the curve.

 

A little off topic but I get so fed up with the 'digital must be better than analogue' assumption.