REFLECTOR: IVO motor

Tue Jun 23 21:26:29 CDT 2009

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.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
>>> 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
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>>
>>   --
>> Mike W.
>> 1997 Velocity Elite RG
>> Franklin /IVO Electric CS
>> Dual GRT EFIS Synthetic Vision
>>
>> ------------------------------
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>>  ------------------------------
>>
>> Internal Virus Database is out of date.
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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 Synthetic Vision
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