Finally got me an Eagletree Data Logger!

[othello]

Are you using the 150A version?

[sikeston34m]

Originally Posted by othello

Are you using the 150A version?

No, I'm using the 100A version.

Amp Draw appears maxed out at 120 Amps with this version. I found that out yesterday when the powerboard melted down on my MMM ESC.

Pegged at 120 amps for about 2.5 seconds until I could get the ESC unplugged.

Thing really put out alot of smoke too. I didn't think I would ever get that smell out of my nose. LOL

I caught it all on the Logger. Unbelieveable!

[othello]

Those 108A peaks made me suspicious and led me to believe you are using a 100A version. My old burned up 100A version recorded similar peaks and also maxed out at 120A. I am now using a 150A version and the graph depicted in the turnigy thread was recorded with the 150A version.

Wow, what happened exactly this early into this run? Did your MMM fail from one moment to the other (as a result of something - braking?) and shorted the batteries. Lipo batteries, Receiver and servo alright? That's an interesting log for sure.

Side note about braking:
When zooming into a graph you might be able to see voltage rise although amps rise too. This happens when you brake with your ESC and current flows back to the battery. The eagletree logger records positive amps although you are not drawing current from the battery.

[sikeston34m]

Originally Posted by othello

Those 108A peaks made me suspicious and led me to believe you are using a 100A version. My old burned up 100A version recorded similar peaks and also maxed out at 120A. I am now using a 150A version and the graph depicted in the turnigy thread was recorded with the 150A version.

Wow, what happened exactly this early into this run? Did your MMM fail from one moment to the other (as a result of something - braking?) and shorted the batteries. Lipo batteries, Receiver and servo alright? That's an interesting log for sure.

Side note about braking:
When zooming into a graph you might be able to see voltage rise although amps rise too. This happens when you brake with your ESC and current flows back to the battery. The eagletree logger records positive amps although you are not drawing current from the battery.

The 108 amp peaks for all these graphs are with the same setup, except for the Death of the Monster Graph. Do you think the 100 amp version isn't recording correctly for anything over 100 amps?

I got a deal on this 100 amp version. That's why I got it.

My MMM was a V2 version. It probably had 150 packs through it. It will be on it's way back to Castle since Patrick stated all V1's and V2's had a lifetime warranty. Based on that, I'm sure I will receive a Brand New V3 MMM in return.

The V2's had their share of problems.

The Lipos, Receiver and Servo's are all ok.

Yes, I've seen examples of the regenerative braking on zooms of the graphs. It's pretty obvious that it's sending energy back to the batteries while braking.

I think this entire thing is really interesting.

[othello]

>Do you think the 100 amp version isn't recording correctly for anything over 100 amps

I remember reading a post written by BrianG where he stated exactly this. Due to the component(s) used to measure amps, accuracy drops rapidly above 100A. I couldn't find the post again. Maybe he can chime in.