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

Fri Mar 16 13:06:12 AKDT 2012

Jim i am running my Jeti on a High speed channel, but i guess the rx is not
in HS mode.  I am wondering if the 7008SB follows the same pattern as the
6028 and is in High Speed all the time on channels 1 - 6?

  _____  

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of James Oddino
Sent: Friday, March 16, 2012 3:57 PM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Plettenberg 30-10 evo and Jeti ESC

I know the Jeti Box does not measure the pulse width on the high speed
channels and I would guess the ESC wouldn't work either.  I run my throttle
(Spin 99 ESC) on channel 7 and I suspect that was because it didn't work on
high speed but I truly can't remember if I actually tried it on a HS
channel.  I told you I was getting old.  Does the 18MZ receiver have any low
rep rate channels?

Jim O

On Mar 16, 2012, at 1:31 PM, ehaury wrote:

Jon

Possibly, as Derek mentioned - setting the RX from HS to standard is worth
trying.

Earl

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

From: Jon Lowe <mailto:jonlowe at aol.com>  

To: nsrca-discussion at lists.nsrca.org 

Sent: Friday, March 16, 2012 3:29 PM

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

Can average volts cause problems like Robert is seeing?  Could the speed
control be looking for both a voltage peak and duration?

Jon

-----Original Message-----
From: ehaury < <mailto:ejhaury at comcast.net> ejhaury at comcast.net>
To: General pattern discussion < <mailto:nsrca-discussion at lists.nsrca.org>
nsrca-discussion at lists.nsrca.org>
Sent: Fri, Mar 16, 2012 3:24 pm
Subject: Re: [NSRCA-discussion] Plettenberg 30-10 evo and Jeti ESC

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:  <mailto:joddino at socal.rr.com> James Oddino 

To:  <mailto:nsrca-discussion at lists.nsrca.org> 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:  <mailto:robcase1 at cox.net> Robert Green 

To:  <mailto:nsrca-discussion at lists.nsrca.org> '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:  <mailto:nsrca-discussion-bounces at lists.nsrca.org>
nsrca-discussion-bounces at lists.nsrca.org [
<mailto: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

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

From:  <mailto:robcase1 at cox.net> Robert Green 

To:  <mailto:nsrca-discussion at lists.nsrca.org> 'General pattern discussion' 

Sent: Friday, March 16, 2012 7:42 AM

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

Ed, I don't like it either I mat try a ferrite ring, as I like the telemetry
feature on the tx from the rx.  Anyone else using the 18MZ receiver seeing
any issues with the motor cutting out?

  _____  

From:  <mailto:nsrca-discussion-bounces at lists.nsrca.org>
nsrca-discussion-bounces at lists.nsrca.org [
<mailto:nsrca-discussion-bounces at lists.nsrca.org?>
mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Ed White
Sent: Friday, March 16, 2012 6:56 AM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Plettenberg 30-10 evo and Jeti ESC

Robert,

The only way I can think of that this is a receiver problem is that motor or
ESC noise is being picked up on the ESC lines (any or all) and the 8 channel
Rx is somehow more tolerant of the noise or better able to filter it than
the other Rx.  I would be uncomfortable at leaving this at - I have to use
my old receiver.   

Ed

  _____  

From: Ronald Van Putte < <mailto:vanputte at cox.net> vanputte at cox.net>
To: General pattern discussion < <mailto:nsrca-discussion at lists.nsrca.org>
nsrca-discussion at lists.nsrca.org>
Sent: Thu, March 15, 2012 10:14:28 PM
Subject: Re: [NSRCA-discussion] Plettenberg 30-10 evo and Jeti ESC

Wait a minute. "The problem was with the receiver." doesn't quite cut it.
What was the problem?  

I'm glad you got the problem "solved", but you can't trust that receiver
until you identify the problem.  BTW, "I don't know" is a perfectly valid
answer, but you could save somebody else a lot of grief if you know what was
wrong with the receiver.

Ron

On Mar 15, 2012, at 8:26 PM, Robert Green wrote:

Well I think I found the issue with the Jeti and the Plettenberg.  The
problem was with the receiver.  I recently got a new radio, and installed
the new rx in the plane, and then the issue started showing up.  I even went
and borrowed a Jeti99Spin, to see if this would resolve the issue, but it
did not, so I started to think of everything that I had changed, and decided
to go back to my 8 channel receiver and voila, everything is back to normal.
Thanks to everyone for there input.  Feels good to have the problem behind
me

  _____  

From:  <mailto:nsrca-discussion-bounces at lists.nsrca.org>
nsrca-discussion-bounces at lists.nsrca.org [
<mailto:nsrca-discussion-bounces at lists.nsrca.org?>
mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Robert
Campbell
Sent: Thursday, March 15, 2012 8:38 AM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Plettenberg 30-10 evo and Jeti ESC

My suggestion to limit throttle isn't to limit current draw.  It's to limit
the motor RPM's so the ESC can remain synchronized with the motor.  If the
motor turns faster than the ESC can handle, the motor will begin screeching.
I've only seen this on outrunners, never inrunners.

Rob

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

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

To:  <mailto:nsrca-discussion at lists.nsrca.org> General pattern discussion 

Sent: Thursday, March 15, 2012 7:55 AM

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

That was my thought. I don't understand why one would want to limit the
throttle to something less than full. Why not install a prop that loads the
motor less?

Bob R.

--- On Thu, 3/15/12, Peter Vogel < <mailto:vogel.peter at gmail.com>
vogel.peter at gmail.com> wrote:

From: Peter Vogel < <mailto:vogel.peter at gmail.com> vogel.peter at gmail.com>
Subject: Re: [NSRCA-discussion] Plettenberg 30-10 evo and Jeti ESC
To: " General pattern discussion " <
<mailto:nsrca-discussion at lists.nsrca.org> nsrca-discussion at lists.nsrca.org>
Cc: "General patterndiscussion" < <mailto:nsrca-discussion at lists.nsrca.org>
nsrca-discussion at lists.nsrca.org>
Date: Thursday, March 15, 2012, 12:15 AM

Limiting throttle does NOT limit current to the motor, in fact, it can cause
higher current draw.  All throttle does is vary the on vs off cycle during
which voltage is sent to the motor. 

Peter+

Sent from my iPhone4S

On Mar 14, 2012, at 7:29 PM, "Robert Green" <
<http://us.mc1616.mail.yahoo.com/mc/compose?to=robcase1@cox.net>
robcase1 at cox.net> wrote:

Hi Rob, the Static amps on the ground is 81 amps.  My throttle is limited to
85 percent.  Even changed out the speed controller and the same thing
happened.   Really wish i knew what was going on?

  _____  

From:
<http://us.mc1616.mail.yahoo.com/mc/compose?to=nsrca-discussion-bounces@list
s.nsrca.org> nsrca-discussion-bounces at lists.nsrca.org [
<mailto:nsrca-discussion-bounces at lists.nsrca.org?>
mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Robert
Campbell
Sent: Wednesday, March 14, 2012 9:18 PM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Plettenberg 30-10 evo and Jeti ESC

Robert,

Which Jeti are you running?  Advance or Spin?  Just a guess, but all the
outrunners I've run require low timing advance and some require fixed end
points and the throttle to be limited to 70 percent or so.  Also, have your
checked your set-up on a watt meter?  Sometimes our set-ups pull more
current than we were expecting and the ESC over current protection kicks in.

Hope this helps.

Rob

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

From:  <http://us.mc1616.mail.yahoo.com/mc/compose?to=robcase1@cox.net>
Robert Green 

To:
<http://us.mc1616.mail.yahoo.com/mc/compose?to=nsrca-discussion@lists.nsrca.
org> 'General pattern discussion' 

Sent: Wednesday, March 14, 2012 8:19 PM

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

Is anyone out there running this combo.  Went flying today, and had some
issue with the speed controller cutting out when i was setting up for my
approach into the pattern.  I was pulling up and advanced the throttle to do
an reverse cuban eight to get into my pattern, when the motor suddenly quit.
I pulled the throttle back and advanced it once again and the motor came
back it did this on every flight except the first flight where i had no
issues whatsoever.  my setting are high timing for the motor, low cut off
voltage, acceleration high, 

thnaks in advance 

  _____  

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