REFLECTOR: IVO motor

Sun Jun 21 12:21:22 CDT 2009

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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