REFLECTOR: IVO motor

Sun Jul 5 13:57:08 CDT 2009

If you definitely think it's the motor, then I would suggest that you
overnight it
to IVO for repairs. They will update it with all the corrections from the
time you
purchased it till now and turn it around in one day.  A local guy may not be
familiar
with the correct torque, current drain etc.

I'm sending you my Cell number in-case you want to compare notes when I am
at the hanger.

On Sun, Jul 5, 2009 at 12:59 PM, John Dibble <aminetech at bluefrog.com> wrote:

>  I used the sandpaper.  Looks like all that came off was carbon.  I also
> cleaned the slip rings very well.  No change in performance.  One thing that
> adds to the problem is that my blades are 1" shorter, so more pitch change
> is needed.  However, I had no problems when the blades were first
> shortened.  Guess I'll have to send the motor in for inspection/repair.
> Anyone know what type of repair to expect?  Can a local motor repair shop do
> the work?
>
> John
>
> Laurence Coen wrote:
>
>  John, If you made the measurements from the wire connector to the slip
> ring there are three places that the drop could be taking place.  They are
> the wire to brush, the brush to brush terminal and the brush to slip ring.
> Since both brushes have the same drop it is unlikely that both would develop
> a bad wiring connection at the same time.  I would suspect the brush to slip
> ring and since you cleaned the slip rings that leaves the brushes.  Slip
> some fine sandpaper between the brushes and the slip rings (grit towards the
> brushes) and sand off the surface.  If there is a layer of burnt oil due to
> arcing at the brushes, this should solve your problem. Larry CoenN136LC
>   *From:* John Dibble <aminetech at bluefrog.com>
> *Sent:* Thursday, July 02, 2009 6:59 AM*To:* Velocity Aircraft Owners and
> Builders list <reflector at tvbf.org>*Subject:* Re: REFLECTOR: IVO motor
>   I've cleaned the rings and still unable to reach the pitch limits.  My
> rings always have a little oil on them and I have never cleaned them
> before.  I measured the voltage drop across the brushes.  For each brush the
> drop is <1 volt in the middle of pitch travel increasing to 5 volts
> approaching the limit.  Does anyone else have this data that I can compare
> with?
>
> John
>
> Michael Watson wrote:
>
> John,
>
> I?ve been using the original brushes supplied by IVO for ten years now and
> really  haven?t  had a problem with them. One problem I have run into, is
> that
> the rings being in the back, develop a coat of oil which increases the
> resistance
> of the brushes, the amount of time required to change the pitch through
> it?s cycle
> increases. A quick cleaning of the rings and brushes with MEK usually solve
>
> that problem.
>
>
>
> On Tue, Jun 23, 2009 at 12:32 PM, John Dibble ?aminetech at bluefrog.com?wrote:
>>
>> I think the ones supplied by IVO are too small.  Mine are 1/4x3/8?.
>>
>> John
>>
>> Michael Watson wrote:
>>
>> Same as the originals. I will measure this Saturday and let you know,
>>
>>   On Mon, Jun 22, 2009 at 2:17 PM, John Dibble ?aminetech at bluefrog.com?wrote:
>>>
>>> What size (cross section) are the brushes?  I bought some replacement
>>> cartridges that fit my holder.
>>>
>>> John
>>>
>>> Michael Watson wrote:
>>>
>>> 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 motorDate: 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.comwrote: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
>>>> CoenN136LC   *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 CoenN136LC   *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_______________________________________________ To change your email
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>>>>
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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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>> Version: 8.0.175 / Virus Database: 270.12.45/2141 - Release Date: 5/29/2009 6:28 AM
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>>
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>
>
>
> --
> Mike W.
> 1997 Velocity Elite RG
> Franklin /IVO Electric CS
> Dual GRT EFIS Synthetic Vision
>
> ------------------------------
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>
>
>  ------------------------------
>
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>
>
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-- 
Mike W.
1997 Velocity Elite RG
Franklin /IVO Electric CS
Dual GRT EFIS HX Synthetic Vision
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