REFLECTOR: IVO motor
Brian Michalk
michalk at awpi.com
Thu Jul 2 07:40:57 CDT 2009
A local Velocity with IVO was having problems reaching the limits too.
The first time which was several years ago, the motor was sent back and
repaired. Exact cause unknown.
This last time about a year ago, was a different cause related to
voltage drop getting to the motor.
1) attach voltmeter to battery+ and motor +. Engage pitch motor, and
write down your voltage drop.
2) attach voltmeter to battery - and motor -. Repeat as above.
3) read voltage across battery unloaded.
Add the voltages from 1 and 2. Subtract from 3. This is the amount of
voltage getting to your IVO motor. If it's below 9 volts, begin chasing
down the large voltage drops in the system. You may have a corroded
connection somewhere.
Take a battery and with short jumpers (2-4 feet total wire length),
connect it directly to the motor to see if the motor will actuate to the
full throw. If not, there's something wrong with the motor. The acme
rod may have some damage or debris in it.
John Dibble wrote:
> 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
>> <mailto: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 <mailto: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
>>>> <mailto: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 <mailto:mikewatsspg at gmail.com>
>>>> wrote:From: Michael Watson ?mikewatsspg at gmail.com
>>>> <mailto:mikewatsspg at gmail.com>?
>>>> To: Velocity Aircraft Owners and Builders list
>>>> ?reflector at tvbf.org <mailto: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
>>>> <mailto: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 <mailto:lwcoen at hotmail.com>
>>>> wrote:From: ?Laurence Coen? ?lwcoen at hotmail.com
>>>> <mailto:lwcoen at hotmail.com>?
>>>> To: ?Velocity Aircraft Owners and Builders list?
>>>> ?reflector at tvbf.org <mailto: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
>>>> <mailto:aminetech at bluefrog.com>*Sent:* Saturday,
>>>> June 20, 2009 5:31 PM*To:* Velocity Aircraft Owners
>>>> and Builders list
>>>> <mailto: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 <mailto:lwcoen at hotmail.com>
>>>> wrote:From: ?Laurence Coen? ?lwcoen at hotmail.com
>>>> <mailto:lwcoen at hotmail.com>?
>>>> To: ?Velocity Aircraft Owners and Builders list?
>>>> ?reflector at tvbf.org <mailto: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
>>>> <mailto:aminetech at bluefrog.com>*Sent:* Saturday,
>>>> June 20, 2009 8:56 AM*To:* Velocity Aircraft Owners
>>>> and Builders list
>>>> <mailto: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
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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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>>>
>>>
>>> --
>>> 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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>>
>>
>>
>> --
>> Mike W.
>> 1997 Velocity Elite RG
>> Franklin /IVO Electric CS
>> Dual GRT EFIS Synthetic Vision
>>
>> ------------------------------------------------------------------------
>> _______________________________________________
>> To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector
>>
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>> ------------------------------------------------------------------------
>>
>> Internal Virus Database is out of date.
>> Checked by AVG - http://www.avg.com
>> 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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