Model Boat Mayhem
Technical, Techniques, Hints, and Tips => Radio Equipment => Topic started by: funtimefrankie on October 02, 2010, 07:45:57 pm
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Whats the difference between digital servos and normal ones?
Are they interchangeable, on say a 40mhz FM Futaba system.
Any advantages in them?
Ta
Frank
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Frank,
Short answer: Yes, completely interchangeable
Longer answer needs us to know why you ask :}
They do more power per size, more cost per size and consume more amps (sometimes)
They also have some habits which need to be understood - nothing bad but with a computer radio they can be persuaded to exceed the travel of things they drive - especially interesting on yacht sheets
andrew
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Digital servos are absolutly no use on boats (except reducing battery life!). You only need them when you must have a very quick action, like in 3 D helis.
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Digital servos are absolutly no use on boats (except reducing battery life!). You only need them when you must have a very quick action, like in 3 D helis.
unless you have a superfast hydro or something similar
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I went with ordinary servos....thanks for the comments
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Usual servo = 0.2s / 60° (or less)
digital servo = 0,1s /60° (or more)....
With a superfast boat you will never use more than 10-15°.
So the maximum response time difference would be about 0.02 s
You must really have a good finger response time !
With helis, this makes a difference because all servos must have the same response time whatever the effort. And cyclic servos do not have the same effort.
Another difference: a digital servo gives the same effort all along the rotation.
On the other hand the effort on a normal servo will decrease when reaching the good position.