MGM Low Voltage Cut Off - Owners READ

I have been posting my problem with my MGM 22418 in the thread http://www.rc-monster.com/forum/showthread.php?t=10124

I started this thread because I think it will get more people to comment who
have had a similar issue. My 22418 has the cutoff problem that many have reported. I am using a Flightpower Evo25 6s 5000mah 25c lipo, so my batteries shouldn't be the issue.

I know that all MGM owners don't seem to have this problem, but there seems to be plenty who do. If we can all pool our thoughts together we may be able to get it solved.

I sent the email copied below to MGM tonight


Greetings,

I am having trouble with my new MGM 22418 – 3. It seems that there are many others who are experiencing this similar issue.

My setup:

22418
Neu 1521/1Y
Flightpower EVO25 6S 5000mah 25c
HPI Savage

When I have the controller set to race mode everything works well. I don’t want to use this mode due to the loss of protection to both my Lipo and the overload protection. When I use reduce RPM mode the performance is poor, and I am pretty sure that the controller is reducing RPM even when the battery is full. When I use cut off mode the cut off is initiated anytime I go past roughly half throttle. My Lipo is a very high quality lipo with 125 amp continuous, 175 amp climb outs, 250 amp max burst capability.

I have attached a word document with screen shots from each of these settings. They were taken with the lipo fully charged and the truck being held off the ground. I also set the acceleration to 2.99, the slowest setting. Even when the truck is held off of the ground these symptoms persist.

Please notice the MAX PEAK CURRENT [A] reading for the 3 settings:

Race Mode – 260.55 [A]
Cut Off – 1679.1 [A]
Reduce RPM – 1515.05 [A]

It seems like there is something wrong with the calibration. In Race Mode the max peak current seems reasonable at 260.55 amps. In the other 2 modes the reading is over 1515 amps, which seems unrealistic.

Please let me know what I can do to remedy the situation. I have run auto tune several times and tested all of my connections. Let me know if you need any other information.

Thank you,

Shon Barrett

I have attached the screen shots from my tests. Note that I have the MGM set to the softest acceleration mode and also note the Max Peak Current differences.

It seems that my problem may be much more severe than others are having, but we all may be having the same problem. So far I feel like this is a calibration problem based on the amp draw shown while in reduce RPM mode and cut off mode. If this calibration is set wrong then why couldn't the voltage cut off be set wrong as well? They could be related.

I think that they should make the voltage cut off adjustable, or solve these issues that many of us are having. At $400 this is a considerable investment. If you have similar problems post here and send an email to MGM @ mgm@mgm-compro.cz

If they see that many of us are having this problem maybe they can adjust the software.

Cheers,

Shon