REFLECTOR: IVO motor

Mon Jun 22 10:19:56 CDT 2009

JOHN,

IVO sells a new clear transparent brush holder. You can visually check
the brushes while doing your walk around. I have 20 hrs. using it. Works
great.

On Sun, Jun 21, 2009 at 3:01 PM, <aminetech at bluefrog.com> wrote:

> I touched the slip rings with the leads from a battery charger and the
> motor ran robustly in both directions.  Then, while operating the switch, I
> measured the volts at the leads to the brushes and saw 10 volts.  So the
> problem is with the brushes.  I have large brushes that I believe are the
> correct size.  I just replaced one because it was almost worn off.  (I broke
> off a large part of it a few years ago).  The other one still has a lot of
> brush left, but maybe I need to replace that one as well.  At least I don't
> have to mess with the motor.
> Thanks for all the help.
>
> John
>
> --- mikewatsspg at gmail.com wrote:
>
> From: Michael Watson <mikewatsspg at gmail.com>
> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
> Subject: Re: REFLECTOR: IVO motor
> Date: Sun, 21 Jun 2009 13:21:22 -0400
>
>
> John,
>
> I have been following this thread and Larry have given you great advise.
>
> Try this. Remove the clips from the top of the brush Assy. Connect
> the leads from a 10~25A battery charger to the top of the Assy one way
> + Red to one brush - Black to the other. the motor should run to the
> max of one pitch setting, reverse the leads from the charger, and the
> motor should run until the prop reaches the max opposite pitch.
> During the runs, the current reading on the charger should read
> between 8 to 12 Amps.
>
> If the above works, then the motor and drive system (worm gear) is ok.
> I regularly do this to make sure all is OK back there.
> Good Luck.
>
>
> On Sun, Jun 21, 2009 at 11:35 AM, <aminetech at bluefrog.com> wrote:
>
>  I'm not sure if my IVO current is measured by the engine monitor, but I
> do see about a 5 amp increase with the switch on.  I measured the volts
> across the contact rings and got 1.7 v when switching to fine pitch (end of
> travel) and 3.5 v when switching to coarse pitch (pitch changing).  These
> numbers seem low.  What should they be?
>
> John
>
> --- lwcoen at hotmail.com wrote:
>
> From: "Laurence Coen" <lwcoen at hotmail.com>
> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
> Subject: Re: REFLECTOR: IVO motor
> Date: Sat, 20 Jun 2009 18:13:38 -0500
>
> John,
>
> No you can't.  The crush plates, lead screw and cam bobbin all need to be
> returned for repair. The blades do not have to be shipped.
>
> Larry Coen
> N136LC
>
>  *From:* aminetech at bluefrog.com
> *Sent:* Saturday, June 20, 2009 5:31 PM
> *To:* Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
> *Subject:* Re: REFLECTOR: IVO motor
>
> I'll try to check the current.  Can the motor be removed without removing
> the blades?
>
> --- lwcoen at hotmail.com wrote:
>
> From: "Laurence Coen" <lwcoen at hotmail.com>
> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
> Subject: Re: REFLECTOR: IVO motor
> Date: Sat, 20 Jun 2009 13:06:48 -0500
>
> John,
>
> I had the same thing happen to me.  In my case the motor was taking
> excessive current.  When the prop passes thru the neutral position, the
> motor should take about 2 amps.  Mine was taking 20 amps and would stall
> before getting to the stops.  You can check this by running the prop pitch
> with the engine stopped and watching the ammeter.  It took three trips back
> to the factory to get it fixed and I'm still keeping my fingers crossed.  I
> also talked with Ivo himself several times.  He is currently living in the
> middle of nowhere Utah.
>
> I never liked the idea of the mechanical stops that simply stall the motor
> and the only way you know you have reached the limit is when the breaker
> pops.  The current rises very rapidly when you get to the stop. I designed a
> current limiter circuit that shuts off the motor before it stalls and turns
> on a light to let you know that you are at the limit.  It seems to be
> working well.
>
> Larry Coen
> N136LC
>
>  *From:* aminetech at bluefrog.com
> *Sent:* Saturday, June 20, 2009 8:56 AM
> *To:* Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
> *Subject:* REFLECTOR: IVO motor
>
>  After a few hours in the TN summer heat, my engine was back together and
> running well again.  I made it to NY the same day in spite of T/S
> approaching from the west.  My skills at negotiating around weather are
> improving, I just don't like this learning process...
> Anyway, on to the next to do.  I am unable to adjust my IVO pitch to either
> full extreme.  Is there a way I can check the voltage at the motor to see it
> it's a poor connection, or the motor itself?
>
> John
>  ------------------------------
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>
>
>
> --
> Mike W.
> 1997 Velocity Elite RG
> Franklin /IVO Electric CS
> Dual GRT EFIS Synthetic Vision
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-- 
Mike W.
1997 Velocity Elite RG
Franklin /IVO Electric CS
Dual GRT EFIS Synthetic Vision
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