REFLECTOR: IVO motor
John Dibble
aminetech at bluefrog.com
Sun Jul 5 11:59:44 CDT 2009
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
> Sent: Thursday, July 02, 2009 6:59 AMTo: Velocity Aircraft Owners and
> Builders listSubject: 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.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
>> > >
>> > > F
>> > > om:aminetech at bluefrog.comSent:
>> > > Saturday, June 20, 2009
>> > > 5:31 PMTo: Velocity
>> > > Aircraft Owners and
>> > > Builders listSubject: 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
>> > >
>> > > F
>> > > om:aminetech at bluefrog.comSent:
>> > > Saturday, June 20, 2009
>> > > 8:56 AMTo: Velocity
>> > > Aircraft Owners and
>> > > Builders listSubject:
>> > > 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.
>> > > 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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>> >
>> >
>> > --
>> > 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
>>
>> --------------------------------------------------------------
>> _______________________________________________
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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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> 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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