data recorder

[Jeepers]

Iam getting ready to buy the eagle tree data recorder:D I noticed there was 2 rpm sensors which one should i get? I also noticed that it records up to 100 amps, but is that its max load handling ability? does that LCD screen have to go in the boat while its running, or can you plug it in after the run to read it?


thanks Sean

[Rex R]

I have it on good authority that if you exceed 115amps the leeds melt off the unit.

[ED66677]

In fact, OSE sell only 2 out of 3 that Eagle Tree makes
if you only want to mesure rpm on a brushless you need this one http://www.offshoreelectrics.com/pro...dh-rpm-kit-brs, it can only be used on brushless because it has to be connected to 2 wires between ESC and motor
if you want to have the flexibility to mesure rpm on any other setup, including plane's prop, OSE also sell the optical one http://www.offshoreelectrics.com/pro...rod=dh-opt-rpm
Eagle Tree also makes an magnetic rpm sensor (Hall Effect sensor http://www.eagletreesystems.com/Plane/8.htm ) but it requires to have a very little magnet glued on the shaft or coupler while the optical one should be able to detect a little piece of aluminium also glued on the shaft or coupler
Hey Mister Vaccaro, why do you sell the optical sensor instead of the magnetic one? optical is mostly used for plane's prop?

regarding the LCD panel look at this : http://www.eagletreesystems.com/Supp...powerpanel.pdf, it can be plugged or unplugged as needed!

regarding the max Amp, I think (I might be wrong!) that they have the possibility to expand the MicroPower logger infinitely, when I look into the software (nice one), in a configuration page, it shows some additionnal 130Amp sensor and some other too, is this something that will be available? I don't know!

I only use it for amp/volt record, I don't have other sensor yet, but it's a great tool!

[Steven Vaccaro]

I can carry the magnetic sensor. I used the optical and thought it was easier than the magnetic system. So I didnt think people would want it. I will be expanding the eagle tree items in the next few weeks.

[ED66677]

Steven,
I just think it's easier to perform a little hole in a coupler and glue a magnet in it than having to install something on shaft/motor/coupler "visible" by the optical sensor! now I don't know if the optical one can sense color difference, if yes it much better!

[Darin Jordan]

Steven,
I just think it's easier to perform a little hole in a coupler and glue a magnet in it than having to install something on shaft/motor/coupler "visible" by the optical sensor! now I don't know if the optical one can sense color difference, if yes it much better!

I used the Optical Sensor last week on my N1-Mono and found it to work very well...

What I did was take a piece of brass tubing that the heat shrink area near the sensor would JUST fit into... I sanded off half of the tube so as to make it only 180-degree (a "canoe" with the ends cut off...), glued it to a small mount, leaving about 1/4" of the brass overhanging each end of the base mount, then placed the assembly on the hull by glueing the base mount to an area of the hull near the coupler in a fashion where the mounted sensor will be pointing directly at the coupler...

The sensor is held into the brass using a couple of nylon wire-ties around the sensor (the heat shrink portion) and the overhanging portion of the brass tubing... It's mounted about 1-2mm from the coupler...

To make the triggering work, I painted 3-flats of the coupler white with a paint pen, and used a black Sharpy to paint the other three flats black... so 1/2 is white and 1/2 is black...

In the settings, under “Tools, Calibrate Motor RPM”, the directions specify to "enter “2.0” as the gear ratio, assuming the spinning object is half light and half dark."

Seems to work great, and no magnets to fly off or cause an inbalance in the coupler, etc... and easy to transfer from boat to boat (I painted up about 5 couplers just to have them ready... )

Hope this helps... I'll try to get some pics of the mount so I can give you a visual of what I'm trying to say above...

[ED66677]

great, some of these optical sensor really needs light to trigger because they are not sensitive enough, if this one detect color differences it's better then!
Great info!
Anyone can paint or apply a black sticker to any coupler!

Jeepers, now you now it all!

[Jeepers]

hey thanks guys! are the units waterproof, or will I need to do my own?

[NorthernBoater]

It does not appear that it has a waterproof coating on it.

[Darin Jordan]

great, some of these optical sensor really needs light to trigger because they are not sensitive enough, if this one detect color differences it's better then!

This one works off of IR, so it actually emmits a beam that reflects back at it (there are two small "windows" at the face of the sensor...)

I was worried that it wouldn't work in the dark, but I have RPM readings that make sense, so I guess it does!

[Jeepers]

thanks guys this really helped alot! Darin, just wondering cant you just put a reflective piece of tape on the coupler and change the gear ratio setting to 1, every time it goes past it would see that one piece of tape and count it as one revolution?

[Darin Jordan]

thanks guys this really helped alot! Darin, just wondering cant you just put a reflective piece of tape on the coupler and change the gear ratio setting to 1, every time it goes past it would see that one piece of tape and count it as one revolution?

I tried just painting one flat on the coupler white, but it seemed to loose triggering capability at higher RPMs... The directions suggested the 1/2 white, 1/2 black, and it seems to work well so that's what I decided to stick with...

[ED66677]

just thinking... when your boat is ready to run, hatch closed, is there any light/luminosity inside? :rolleyes:

[Darin Jordan]

just thinking... when your boat is ready to run, hatch closed, is there any light/luminosity inside? :rolleyes:

The sensor emits an IR beam that is reflected back... The white reflects it... the black absorbs it...

[ED66677]

then it's pure color reflection! another proof of good design from Eagle Tree!