MGM ESC and USBCOM+ ? - RC-Monster Forums

gixxer · 09.07.2007, 11:32 AM

Quote:

Originally Posted by bdebde

I just got the usb com+ last night and set up my 16024. The software is easy to use. I am bummed that there is no setting for cut off voltage though (wanted 3.2 volts per cell).

that sucks. I thought it would let you set it higher with the software. Thats one of the main reasons I wanted to try it. Well I also want to see what kind of amps the setup is pulling.

jhautz · 05:16 PM

The Expert+ doesnt allow adjustment for the cutoff voltage either. Just settings for cell count.

Does anyone know what the actual cut off voltage per cell is for the MGMs? I assumed it was 3.0V/cell, but it seems to be a bit higher than that. I run some lower end lipos for bashing and it seems to be very sensitive on the LVC. I wasnt sure what was happening, but under hard acceleration it want to trip the LVC. When I go back to neutral it resets and I can keep running so it appears to be the LVC. But when I checked it with an eagletree data recorder its not hitting the 3.0V/cell mark and it is triggering the lvc. It seems to be tripping at around 3.15v/cell. Id really like to be able to adjust the cut off voltage as well, but I dont think its possible. Setting the ESC to race mode eliminates the cutting out problem, but also disables the LVC.

I can also eliminate the problem by setting the motor spool up timing higher, but that limits the acceleration, and therefore reducing the current draw. Also, my high end lipos have no problem and they never dip

Just wondering if anyone else has seen this same thing.

BTW: I see the same thing on both of my MGMs (16016 -new one and 16024 - old one)

crazyjr · 09.07.2007, 08:26 PM

Quote:

Originally Posted by gixxer

that sucks. I thought it would let you set it higher with the software. Thats one of the main reasons I wanted to try it. Well I also want to see what kind of amps the setup is pulling.

According to my MGM instructions sheets, the programmking card does offer diffeerent options for per cell cut off

Quote:

by Jhautz
Does anyone know what the actual cut off voltage per cell is for the MGMs?

It looks like default is 3vper cell, but its limiting all the way from 3.8v down to the cutoff. It seems to calculate the voltage and use to help batteries run better without dipping too far too soon. this is according to the literature i got

jhautz · 09.07.2007, 10:41 PM

Hmmm.... Sounds like I need to get the programing card too then. Dang. If its adjustable why cant they just make it available from all of the programaing options. Thats stupid that they only make it available from one of the 3 programaing options. (and it figures its the one I dont have.)

bdebde · 09.07.2007, 11:26 PM

Quote:

Originally Posted by jhautz

Hmmm.... Sounds like I need to get the programing card too then. Dang. If its adjustable why cant they just make it available from all of the programaing options. Thats stupid that they only make it available from one of the 3 programaing options. (and it figures its the one I dont have.)

Yeah same here, and Mike doesn't have them either.