wrote: Jim, Can you point me to the "balance meter" you're using? John -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ --0-1488186913-1137765220=:77159 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: 8bit

Dave,

The meter just reads the relative current flow while the motor is engaged. It is not exactly a linear reading but it increases from just a few amps in the center of the travel to about 10 amps towards the ends of travel.

Much better than waiting for the breaker to pop.

It will not indicate prop pitch position.

That would require an encoder on the motor or leadscrew itself.

Then you would have to somehow feed that signal back to be read and decoded by another device or computer.

Jim
David Staten <Dastaten@earthlink.net> wrote:

Jim...

I am following up on a previous post from November that is attached below. You discussed using an ammeter and resistor to indicate relative power draw as an indication of how many amps your IVO was requiring.

One question. Is this indication (using the equipment you have selected) ONLY when current is flowing? or does the needle stop where it last was indicated (as in, to make an adjustment that only toggles the switch for a moment, do you have to take time out at look at that gauge that very instant, or does it have some "memory" of position, like a trim indicator would?

Im guessing its a momentary indication, but wanted to ask anyways.
Dave

James Maher wrote:

Sure thing John.

The link below is for the one that I am using.

http://www.mouser.com/index.cfm?handler=displayproduct&lstdispproductid=276342&e_categoryid=643&e_pcodeid=03901

There are several styles but I like this one because it shows direction and relative amount

without any actual values.

You will have to insert a 0.015 ohm 5 watt resistor in series with one of the wires that drives the motor, as a current sense. The meter is then connected across this resistor.

I used the one in the link below, also from Mouser.

http://www.mouser.com/index.cfm?&handler=data.listcategory&D=*71LVR50.015*&terms=71-LVR5-0.015&Ntt=*71LVR50.015*&Dk=1&Ns=SField&N=0&crc=true

This was not all my idea.

I saw a gentleman at Oshkosh a few years ago with an old ammeter that did the same thing.

I just updated to the newer style meter.

It beats waiting for the circuit breaker to pop.

Jim
John Slade <sladerj@bellsouth.net> wrote:

Jim,

Can you point me to the "balance meter" you're using?

John
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