REFLECTOR: IVO motor
John Dibble
aminetech at bluefrog.com
Mon Jul 6 12:24:39 CDT 2009
Larry,
I agree that the problem seems to be with the brushes. I applied 12 v
to the rings and the motor ran fine. However, I just replaced one of
the brushes and it still gives a 5 v drop between where the wire is
soldered to the brush holder and the slip ring. Have you or anyone else
measured this voltage drop? Maybe the motor is drawing a lot of current
near the stops. I think I'll use the battery charger on the rings again
and note the current as it approaches the stop
My oil pressure and temperature sensors are right at the cooler outlet.
I know they should be at the inlet to the engine, but that is where the
builder put them. Anyway, the temp I'm seeing is not a mixture of
cooled and bypassed oil as you suggested. At what oil pressure (for the
normal spring) would oil be bypassed around the cooler? Do I understand
correctly that this is a high pressure which only occurs when the oil is
cold?
John
Laurence Coen wrote:
> John, You previously stated that you had a 5 volt drop across each
> brush with the motor stalled. The drop should be closer to 0.1 volt.
> Before you ship off your motor I would suggest that you apply 12 volts
> directly to the slip rings to see if the motor will run to the stop.
> If it does I would recommend that you order a new brush holder with
> new brushes. If I remember correctly it only cost about $12. With
> your current set up you're only getting 2 volts to the motor so you
> can't fault it for not doing its job. My oil pressure runs about 50
> psi in flight with an oil temp of 190 F. The stiffer spring Mike
> mentioned is not the spring that sets oil pressure but is the one that
> sets the opening pressure of the bypass. This is why your temp went
> up when you raised the oil pressure. The higher oil pressure opened
> the bypass and and thus bypassed the oil cooler. The bypass valve
> determines how much oil goes through the oil cooler. When you raised
> the pressure the total flow increased but not the flow through the oil
> cooler. The temp sensor is then seeing the mixture of hot oil coming
> from the bypass and cool oil from the cooler. I think the cure would
> be to have the stiffer bypass spring and put back the washers on the
> pressure side. Larry CoenN136LC
>
> From: John Dibble
> Sent: Sunday, July 05, 2009 11:59 AMTo: Velocity Aircraft Owners and
> Builders listSubject: Re: REFLECTOR: IVO motor
> 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
>> > > > ------------------------
>> > > >
>> > > > _____________
>> > > > _________________________________
>> > > >
>> > > > To change your email
>> > > > address, visit
>> > > > http://www.tvbf.org/mailman/listinfo/reflector
>> > > >
>> > > > Visit the gallery!
>> > > > www.tvbf.org/gallery
>> > > > user:pw =
>> > > > tvbf:jamaicangoose
>> > > > Check new archives:
>> > > > www.tvbf.org/pipermail
>> > > > Check old archives:
>> > > > http://www.tvbf.org/archives/velocity/maillist.html
>> > > > _______________________________________________
>> > > > To change your email
>> > > > address, visit
>> > > > http://www.tvbf.org/mailman/listinfo/reflector
>> > > > Visit the gallery!
>> > > > www.tvbf.org/gallery
>> > > > user:pw =
>> > > > tvbf:jamaicangoose
>> > > > Check new archives:
>> > > > www.tvbf.org/pipermail
>> > > > Check old archives:
>> > > > http://www.tvbf.org/archives/velocity/maillist.html
>> > > > ------------------------
>> > > >
>> > > > _______________________________________________
>> > > >
>> > > > To change your email
>> > > > address, visit
>> > > > http://www.tvbf.org/mailman/listinfo/reflector
>> > > >
>> > > > Visit the gallery!
>> > > > www.tvbf.org/gallery
>> > > > user:pw =
>> > > > tvbf:jamaicangoose
>> > > > Check new archives:
>> > > > www.tvbf.org/pipermail
>> > > > Check old archives:
>> > > > http://www.tvbf.org/archives/velocity/maillist.html
>> > > > _______________________________________________
>> > > > To change your email
>> > > > address, visit
>> > > > http://www.tvbf.org/mailman/listinfo/reflector
>> > > > Visit the gallery!
>> > > > www.tvbf.org/gallery
>> > > > user:pw =
>> > > > tvbf:jamaicangoose
>> > > > Check new archives:
>> > > > www.tvbf.org/pipermail
>> > > > Check old archives:
>> > > > http://www.tvbf.org/archives/velocity/maillist.html
>> > > >
>> > > >
>> > > > _______________________________________________
>> > > >
>> > > > To change your email
>> > > > address, visit
>> > > > http://www.tvbf.org/mailman/listinfo/reflector
>> > > >
>> > > > Visit the gallery!
>> > > > www.tvbf.org/gallery
>> > > > user:pw =
>> > > > tvbf:jamaicangoose
>> > > > Check new archives:
>> > > > www.tvbf.org/pipermail
>> > > > Check old archives:
>> > > > http://www.tvbf.org/archives/velocity/maillist.html
>> > > >
>> > > >
>> > > >
>> > > >
>> > > > --
>> > > > 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
>> > > > Visit the gallery!
>> > > > www.tvbf.org/gallery user:pw =
>> > > > tvbf:jamaicangoose Check new
>> > > > archives: www.tvbf.org/pipermail
>> > > > Check old archives:
>> > > > http://www.tvbf.org/archives/velocity/maillist.html
>> > > >
>> > > >
>> > > > _______________________________________________
>> > > >
>> > > > To change your email address,
>> > > > visit
>> > > > http://www.tvbf.org/mailman/listinfo/reflector
>> > > >
>> > > > Visit the gallery!
>> > > > www.tvbf.org/gallery
>> > > > user:pw = tvbf:jamaicangoose
>> > > > Check new archives:
>> > > > www.tvbf.org/pipermail
>> > > > Check old archives:
>> > > > http://www.tvbf.org/archives/velocity/maillist.html
>> > > >
>> > > >
>> > > > --
>> > > > 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
>> > > >
>> > > > Visit the gallery! www.tvbf.org/gallery
>> > > > user:pw = tvbf:jamaicangoose
>> > > > Check new archives: www.tvbf.org/pipermail
>> > > > Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>> > > >
>> > > > ----------------------------------------
>> > > >
>> > > > 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
>> > > >
>> > > >
>> > >
>> > > _______________________________________________
>> > >
>> > > To change your email address, visit
>> > > http://www.tvbf.org/mailman/listinfo/reflector
>> > >
>> > > Visit the gallery! www.tvbf.org/gallery
>> > > user:pw = tvbf:jamaicangoose
>> > > Check new archives: www.tvbf.org/pipermail
>> > > Check old archives:
>> > > http://www.tvbf.org/archives/velocity/maillist.html
>> > >
>> > >
>> > >
>> > >
>> > > --
>> > > 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
>> > >
>> > > Visit the gallery! www.tvbf.org/gallery
>> > > user:pw = tvbf:jamaicangoose
>> > > Check new archives: www.tvbf.org/pipermail
>> > > Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>> > >
>> > > --------------------------------------------------
>> > >
>> > > 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
>> > >
>> > >
>> >
>> > _______________________________________________
>> > To change your email address, visit
>> > http://www.tvbf.org/mailman/listinfo/reflector
>> >
>> > Visit the gallery! www.tvbf.org/gallery
>> > user:pw = tvbf:jamaicangoose
>> > Check new archives: www.tvbf.org/pipermail
>> > Check old archives:
>> > http://www.tvbf.org/archives/velocity/maillist.html
>> >
>> >
>> >
>> >
>> > --
>> > 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
>> >
>> > Visit the gallery! www.tvbf.org/gallery
>> > user:pw = tvbf:jamaicangoose
>> > Check new archives: www.tvbf.org/pipermail
>> > Check old archives:
>> > http://www.tvbf.org/archives/velocity/maillist.html
>> >
>> > -------------------------------------------------------------
>> >
>> > 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
>> >
>> >
>> ---------------------------------------------------------------------
>>
>> _______________________________________________
>> To change your email address, visit
>> http://www.tvbf.org/mailman/listinfo/reflector
>>
>> Visit the gallery! www.tvbf.org/gallery
>> user:pw = tvbf:jamaicangoose
>> Check new archives: www.tvbf.org/pipermail
>> Check old archives:
>> http://www.tvbf.org/archives/velocity/maillist.html
>>
>> --------------------------------------------------------------
>> _______________________________________________
>> To change your email address, visit
>> http://www.tvbf.org/mailman/listinfo/reflector
>>
>> Visit the gallery! www.tvbf.org/gallery
>> user:pw = tvbf:jamaicangoose
>> Check new archives: www.tvbf.org/pipermail
>> Check old archives:
>> http://www.tvbf.org/archives/velocity/maillist.html
>>
>> --------------------------------------------------------------
>>
>> 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
>>
>>
> -----------------------------------------------------------------------
>
> _______________________________________________
> To change your email address, visit
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery! www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives:
> http://www.tvbf.org/archives/velocity/maillist.html
>
> ----------------------------------------------------------------
> _______________________________________________
> To change your email address, visit
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery! www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives:
> http://www.tvbf.org/archives/velocity/maillist.html
>
> ----------------------------------------------------------------
>
> 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
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.tvbf.org/mailman/private/reflector/attachments/20090706/4d094d75/attachment-0001.htm>
More information about the Reflector
mailing list