[NSRCA-discussion] Plettenberg 30-10 evo and Jeti ESC

[ehaury]

John / Jim

The 6008HS can be be set to "HS" or "std". I assume that the 7008 can be also - but out of the box mine appears to be "reg". I'm using the original Jeti/Hacker 90 Comp ESC's and they work fine on a HS channel. I haven't tried them with the 7008 RX yet - this discussion has moved my interest in the 7008 up in priority though and I'll try it soon.

Jim - understand the old part, not ancient like RVP - old none the less, but way better than the alternative.  

Earl
  ----- Original Message ----- 
  From: John Gayer 
  To: General pattern discussion 
  Sent: Friday, March 16, 2012 3:49 PM
  Subject: Re: [NSRCA-discussion] Plettenberg 30-10 evo and Jeti ESC


  Earl,
  Your numbers imply that the frame rate of the 7008SB is 1/2 the frame rate of the 6008HS for discrete channels. That doesn't seem like the right direction for Futaba to be steering. Or is just that on a SB system the discrete channels are an afterthought?
  John

  On 3/16/2012 2:23 PM, ehaury wrote: 
    Well, Jim caught me. So much for quick & dirty! 

    I made the servo signal measurements using a high impedance meter with a scope mode. It displays a voltage at the top of the scope screen, as well as a freq. Without thinking, that voltage is the number I reported, and it's 50% different between the RX's because one was operating at 2X the freq of the other, but it's not pulse amplitude but average volts. 

    I took another look and the actual pulse amplitude is the same for both, and is 3v as Jim observed. Pretty obvious upon thinking about it. So - Futaba didn't change anything and Robert's problem isn't with pulse amplitude. 

    Jim, thanks for questioning me - sorry for the confusion. 

    Earl

      ----- Original Message ----- 
      From: James Oddino 
      To: General pattern discussion 
      Sent: Friday, March 16, 2012 1:55 PM
      Subject: Re: [NSRCA-discussion] Plettenberg 30-10 evo and Jeti ESC


      Earl, something doesn't look right.  How did you measure the pulse amplitude?  Did you have a servo connected?  I measure 3.0 volts peak unloaded on a 6108SB. 


      Jim O




      On Mar 16, 2012, at 8:18 AM, ehaury wrote:


        I compared the servo pulse amplitude of the 6008HS (0.64v) and the 7008SB (0.32v) RXs. That's a significant difference, while Futaba servos are designed to work at that level, other stuff isn't. That's likely the issue with your ESC. 

        Earl
          ----- Original Message ----- 
          From: Robert Green 
          To: 'General pattern discussion' 
          Sent: Friday, March 16, 2012 8:44 AM
          Subject: Re: [NSRCA-discussion] Plettenberg 30-10 evo and Jeti ESC


          Thanks Earl i was told that someone else in Europe was experiencing similar problems with theirs as well.  Hope they can get it resloved.



----------------------------------------------------------------------

          From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of ehaury
          Sent: Friday, March 16, 2012 8:27 AM
          To: General pattern discussion
          Subject: Re: [NSRCA-discussion] Plettenberg 30-10 evo and Jeti ESC


          Suggest you give Futaba service / Steve Kaluf a call. It may be that the RX pulse rise is a little low for the ESC. Futaba have, in the past at least, used a lower pulse amplitude than some others which resulted in strange results when mixing servos on occasion. If this is the case, the problem is more compatibility with the ESC than RX defect, still annoying though.


          Earl







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