[NSRCA-discussion] low profile JR servo?

[Dean Pappas]

Thanks Tony,
This is a great leap forward: no more bad spot in the TX stick after 1000 flights! Yeah ...
So back in the very early eighties, just minutes after walking onto the show floor at the old Toledo Sports Arena, I buttonholed Jim Oddino and showed him my neat linear variable differential opto-pot scheme for replacing servo pots. Jim politely dragged me over to look at the brand new Futaba PCM512, and said something to the effect that PCM was well ahead of replacing potentiometers in the scheme of things.
He was right.
Dean
 
 

Dean Pappas 
Sr. Design Engineer 
Kodeos Communications 
111 Corporate Blvd. 
South Plainfield, N.J. 07080 
(908) 222-7817 phone 
(908) 222-2392 fax 
d.pappas at kodeos.com 

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Tony Stillman
Sent: Wednesday, February 21, 2007 11:29 AM
To: 'NSRCA Mailing List'
Subject: Re: [NSRCA-discussion] low profile JR servo?



Yes, it does.

 

 

Tony Stillman, President

Radio South

3702 N. Pace Blvd

Pensacola, FL 32505

1-800-962-7802

www.radiosouthrc.com

 


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From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Dean Pappas
Sent: Wednesday, February 21, 2007 10:03 AM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] low profile JR servo?

 

Hi Tony,

Does the throttle channel use the same encoder? If so, then it must be some sort of absolute encoder.

Dean

 

Dean Pappas 
Sr. Design Engineer 
Kodeos Communications 
111 Corporate Blvd. 
South Plainfield, N.J. 07080 
(908) 222-7817 phone 
(908) 222-2392 fax 
d.pappas at kodeos.com 

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Tony Stillman
Sent: Wednesday, February 21, 2007 9:50 AM
To: 'NSRCA Mailing List'
Subject: Re: [NSRCA-discussion] low profile JR servo?

Gordon:
I am just passing along the info as the comment was made.  I have the encoders in stock, as Futaba made a change in the production of the 14MZ and sent me new ones to change out when needed.

 

 

Tony Stillman, President

Radio South

3702 N. Pace Blvd

Pensacola, FL 32505

1-800-962-7802

www.radiosouthrc.com

 


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From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Gordon Anderson
Sent: Wednesday, February 21, 2007 8:40 AM
To: 'NSRCA Mailing List'
Subject: Re: [NSRCA-discussion] low profile JR servo?

 

The futaba 14MZ flyer I have says "Gimbals with long-life potentiometer, quad bearings, adjustable tension and detent."

In general encoders are not absolute positioning devices and you need to define "home". Resolvers are absolute positioning devices but larger and more costly.

 

--Gordon

 


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From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Tony Stillman
Sent: Wednesday, February 21, 2007 5:46 AM
To: 'NSRCA Mailing List'
Subject: Re: [NSRCA-discussion] low profile JR servo?

The Futaba 14MZ uses shaft encoders on the sticks....

 

 

Tony Stillman, President

Radio South

3702 N. Pace Blvd

Pensacola, FL 32505

1-800-962-7802

www.radiosouthrc.com

 


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From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Bob Richards
Sent: Wednesday, February 21, 2007 7:18 AM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] low profile JR servo?

 

Hah, I didn't even think about the stick pots. Seems that would be the first place they would try using shaft encoders.

 

Linear outputs from the servos would be great, also. Oh, wait a minute, that was done 35 years ago with the KPS-11 servos. Nevermind....   :-)

 

Bob R.

Earl Haury <ehaury at houston.rr.com> wrote:

Isn't technology great - $2000+ TX and $100+ servos with everything riding on a 50 cent pot on each end! 

 

Earl

----- Original Message ----- 

From: Bob Richards <mailto:bob at toprudder.com>  

To: NSRCA Mailing List <mailto:nsrca-discussion at lists.nsrca.org>  

Sent: Tuesday, February 20, 2007 8:37 PM

Subject: Re: [NSRCA-discussion] low profile JR servo?

 

When you say analog, I assume you are talking about the feedback loop? I wonder how long it will be until we get shaft encoders in our servos. Or, for that matter, the shaft encoder could be mounted to the control surface itself.

 

Bob R.



"J.Oddino" < joddino at socal.rr.com> wrote:

Correct.  Well kind of.  Actually all of our servos are analog but you are right, the super servos used the same principles as our modern "digital" servos.

 

Jim O

----- Original Message ----- 

From: Bob  <mailto:bob at toprudder.com> Richards 

To: NSRCA Mailing  <mailto:nsrca-discussion at lists.nsrca.org> List 

Sent: Tuesday, February 20, 2007 1:22 PM

Subject: Re: [NSRCA-discussion] low profile JR servo?

 

I was under the impression that the "Super Servos" were actually first generation digital servos. Is that not correct?

 

Bob R.



 


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