[NSRCA-discussion] Servo Signals

[Jay Marshall]

Days? How about 35 years...

 

Jay Marshall 

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Bob Richards
Sent: Monday, June 22, 2009 1:06 PM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Servo Signals

 


Yes, as long as they are clean. That is the problem, it depends on contact
between two components and the friction wears them out.

 

I remember years ago that the large heathkit (and possibly some Kraft)
servos used variable capacitors for feedback. not much to wear.

 

Ok, Jay, how long ago were the "days" you were talking about? :-)  

 

Bob R.



--- On Sun, 6/21/09, Jay Marshall <lightfoot at sc.rr.com> wrote:

 

I remember from my days in control systems theory that the analog computers
were faster and more accurate than the IBM big iron computers. Analog pots
are still cheaper, lighter, and higher resolution than digital encoders - as
long as they are clean.

 

 

 

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