[NSRCA-discussion] Futaba R6014FS Receivers

[Ed Alt]

Contacting mfgs might help, however I would not assume that because a servo is recently manufactured, it is good to go with a minimal input level.  Typically, you pick a chip and you use it for a good, long time.  My baseline assumption until otherwise proven would be that whatever JR came out with with the advent of their digital servos is still being used.  There's no economic reason to change it.  Also, there is definitely no advantage to being able to work with lower input levels in our application.  The lower the signal threshold is that the servo will respond to, the more likely it is to respond to spurious signals (noise).  Your mileage may vary.

Ed

----- Original Message ----- 
  From: Keith Hoard 
  To: General pattern discussion 
  Sent: Saturday, November 22, 2008 8:45 AM
  Subject: Re: [NSRCA-discussion] Futaba R6014FS Receivers


  I think all of the recently manufactured servos are made to work fine with the lower signal voltage.  I would just contact the manufacturer. .  perhaps easier than designing a " simple buffer"?


  On Fri, Nov 21, 2008 at 11:00 PM, Ed Alt <ed_alt at hotmail.com> wrote:

    Aside from using a purpose built servo that matches logic families with the receiver, the only real solution is to insert a level translater in between; basically a simple buffer that allows you to take a lower voltage ourput signal from one logic family in the receiver and boost the signal level to work with a servo that requires higher levels for safe operating margins.  Personally, I would not fly other servos without doing this, even if they seem to be working fine.   Jim Oddino's post  used two very instructive words:  "ragged edge".   

    Ed
      ----- Original Message ----- 
      From: Bob Richards 
      To: General pattern discussion 
      Sent: Friday, November 21, 2008 9:42 PM
      Subject: Re: [NSRCA-discussion] Futaba R6014FS Receivers


            I think I read somewhere that the R608FS receiver uses the same chipset and has the same problem.

            So far I have not had any problems with the servos that I use, but I was not able to check the pulse width out of the higher channels with my Hitec programmer. I have to wonder, however, exactly what is the logic level for the various servos? Also, does the logic level of the servo change with a different battery voltage? Does the output level from the rx change with a different battery voltage?

            I guess this is a good reason to use some sort of output conditioner (powerbox, etc) if mixing brands of receivers and servos.

            Bob R.


            --- On Fri, 11/21/08, MKMSG <mkmsg at cox.net> wrote:

              From: MKMSG <mkmsg at cox.net>
              Subject: [NSRCA-discussion] Futaba R6014FS Receivers
              To: "NSRCA Discussion List" <nsrca-discussion at lists.nsrca.org>
              Date: Friday, November 21, 2008, 1:15 AM


              I was reading the FAQ section of the Futaba website when a particular item caught my eye regarding the R6014FS 2.4 receiver.  The FAQ states that the use of non Futaba digital servos with the R6014FS receiver may be problematic due to the 6014's lower output voltage of 2.7 volts.  Since I do occasionally mix and match Futaba and JR servos and use the 8 channel 2.4 receiver, I wondered if this issue was common to all Futaba 2.4 receivers.  Here's Futaba's answer: "The FAQ refers only to the R6014FS receiver, this is the only one that has the lower voltage."  Just thought I'd pass this along in case someone experiences performance anomalies with the 6014 receivers using other than Futaba servos.

              Mike
              NSRCA 35


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  -- 

  Keith Hoard
  Collierville, TN
  khoard at gmail.com





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