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

Derek Koopowitz derekkoopowitz at gmail.com
Fri Mar 16 13:06:42 AKDT 2012 

Jim,

My Jeti SPIN worked fine running on the HS channel - only the programming
box wouldn't work when plugging into CH6.  When I changed it to "normal"
mode it worked just fine.

-Derek

On Fri, Mar 16, 2012 at 1:57 PM, James Oddino <joddino at socal.rr.com> wrote:

> 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 <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 <ejhaury at comcast.net>
> To: General pattern discussion <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:* James Oddino <joddino at socal.rr.com>
> *To:* General pattern discussion <nsrca-discussion at lists.nsrca.org>
> *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 <robcase1 at cox.net>
> *To:* 'General pattern discussion' <nsrca-discussion at lists.nsrca.org>
> *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<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:* Robert Green <robcase1 at cox.net>
>  *To:* 'General pattern discussion' <nsrca-discussion at lists.nsrca.org>
>  *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:* nsrca-discussion-bounces at lists.nsrca.org [
> mailto:nsrca-discussion-bounces at lists.nsrca.org<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 <vanputte at cox.net>
> *To:* General pattern discussion <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:* nsrca-discussion-bounces at lists.nsrca.org [
> mailto:nsrca-discussion-bounces at lists.nsrca.org<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:* Bob Richards <bob at toprudder.com>
>  *To:* General pattern discussion <nsrca-discussion at lists.nsrca.org>
>  *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 <vogel.peter at gmail.com>* wrote:
>
>
> From: Peter Vogel <vogel.peter at gmail.com>
> Subject: Re: [NSRCA-discussion] Plettenberg 30-10 evo and Jeti ESC
> To: " General pattern discussion " <nsrca-discussion at lists.nsrca.org>
> Cc: "General patterndiscussion" <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" <robcase1 at cox.net<http://us.mc1616.mail.yahoo.com/mc/compose?to=robcase1@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:* nsrca-discussion-bounces at lists.nsrca.org<http://us.mc1616.mail.yahoo.com/mc/compose?to=nsrca-discussion-bounces@lists.nsrca.org>[
> mailto:nsrca-discussion-bounces at lists.nsrca.org<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:* Robert Green<http://us.mc1616.mail.yahoo.com/mc/compose?to=robcase1@cox.net>
>  *To:* 'General pattern discussion'<http://us.mc1616.mail.yahoo.com/mc/compose?to=nsrca-discussion@lists.nsrca.org>
>  *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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