Please, explain me what's a servo tonearm...

[FreedomJazz]

Greetings to all,

Please, appreciate very much if someone can explain what's exactly a servo tonearm?

They are fully automatic tonearms, or the ones that just lifts when the record ends?

There's some benefits in tracking ability also?

What are the pros and cons of servo tonearms, like to some Denon and JVC turntables like this:

http://www.thevintageknob.org/denon-DP-59M.html

https://www.vinylengine.com/library/jvc/ql-y66f.shtml

Many thanks, best regards to all.

 

[Wes_in_VA]

https://www.nytimes.com/1984/11/04/arts/sound-unusual-tonearms-enhance-the-quality-of-lp-music.html

Do a google search and there’s lots more discussion out there.

 

[Nat]

Servo arms have mechanisms that respond to motion in the arm. This can be helpful to damp oscillation in the arm, and possibly to control resonances. Generally the servo system is different from that of an automatic, since the servo is controlling very small movement, but tables that are complex enough to include servos often will be pretty full service.