9920 or mgm 160 - RC-Monster Forums

sleepy23 · **9920 or mgm 160 -** 08.14.2005, 02:58 PM

Ok, i officially HATE my mgm 80 controller and am to the point that if I dont get rid of IT, i will be converting to nitro. So having said that, which controller would be best for a stadium truck. I want it to have a good bec so no receiver pack, and i want SUPER easy to program (thus both are programable via computer), i typically will only be running either a 6-8 cell nimh pack or a 2s or 3s lipo. So what do you think and how much do you think I could get from a slightly used mgm 80 controller? its to the point that i like the slow novak 5800 more than the mgm system.
thanks

coolhandcountry · 08.14.2005, 04:13 PM

I like the ultimate bec over a reciever pack. so that shouldn't be in the works.

Serum · 08.14.2005, 04:58 PM

What's the fuzz with your MGM80?

MetalMan · 08.14.2005, 07:43 PM

The MGM 160 isn't computer programmable via computer.
The 9920's BEC isn't any good on 6-7cells, but okay on 8.
I wonder the same thing as Serum... What don't you like about it, the programming?

sleepy23 · 08.14.2005, 11:21 PM

i had it programmed and it worked a little while. i made sure everything was setup for lipo. i ran the pack a bit, then discharged it to make sure i got the lipo setting correct, i did. ok, so that was last week, this weekend, i charged up the lipo and took it out for a run, it keep loosing its mind. everytime i would punch it, it would lose all throttle and brake, would have nothing but steering.(now that i think bout it, i could have it set in motor cutoff by acident..maybe). so all that was saturday, today (sunday) i decided to reprogram and try it again. I go to reprogram and the esc wont take a program, all it does is beep contineuosly. So far, it has ran right for less than two complete battery packs. to me that is total BS, i want something that packs the power is like novak ( super freakin simple to operate for people that hate dealing with electrical related issues)

Serum · 08.15.2005, 01:09 AM

don't let it get to you.. have some patience. you will get more power from this setup than from the novak. i still don't understand what the real problem is (your story isn't quite clear to me). Perhaps Mike can help you out.

@ metalman;

The new 9920 should have got no problems anymore with BEC and 6-7 cells.

MetalMan · 08.15.2005, 03:36 AM

If the MGM is giving a continuous beeping/flashing, that usually indicates that there is an error. Have you looked at the manual for the error code?

sleepy23 · 08.15.2005, 09:52 AM

its actually been a continueous problem. I have talked with Mike and we was great with walking me thru the programming. i got it working and it worked for about 1 pack and then i didnt use it for a week until i got my lipo charged up. when i went out to run it...nothing but problems.
what it does is lose the throttle and break completely ( no control) when i give it full throttle. it doesnt matter if i do it off the line or when i am already moving. as soon as i punch it, i lose all control (except for steering).
when i went to program and try again yesterday, the controller just does the continueous beep. i looked at the book, didnt see anything helpful, will look again when i get home.
i have had this thing for several months now and not had too much success, that is why I am looking for something else. i know novak doesnt have the power, but it doesnt give me any problems either.

coolhandcountry · 08.15.2005, 10:05 AM

Does it contunously beep with lipo or did you try the other battery pack?

sleepy23 · 08.15.2005, 11:40 AM

tried another pack.....continueous beep

MetalMan · 08.15.2005, 05:55 PM

Did you reconfigure it for the NiMh/NiCd pack (for the voltage cutoff)? Try running a fully charged Lipo with the cutoff set to NiMh/NiCd (in the programming).

RC-Monster Mike · 08.15.2005, 11:13 PM

If the controller is programmed for a 3s lipo, it will give an error code if you try to plug in a pack other than this voltage(so, a 6 cells nimh pack will yield an error code). The cutout you are experiencing is due to low voltage or high current drain.

sleepy23 · 08.16.2005, 11:13 AM

ok, well here is my setup. the mgm80 with the 6s motor. all this is in a t4 that is modded for the street (lowered, lightened, no slipper, modified tranny). i was running the 2s pack (right after charging it on the ICE charger) with approx. 31/104 gearing (like i said, modded for street). as long as i never punched it, it would go, as soon as i went full throttle, it died. i have been pretty pissed with rc lately, so i havent even touched it in a few days. the last time i did, it was giving the consistent beeping and wouldnt do anything.

RC-Monster Mike · 08.16.2005, 07:25 PM

It sounds like the voltage is dropping on the Lipo pack and causing the controller to cut out. I had this issue myself. I actually changed the battery parameter back to nimh/nicad and the problem seems to have disappeared(I wish I had done this a couple days ago, as I had the cut out issue at the RC-Madness race, which cost me some time!). The constant beeping would suggest that you may have the battery setup on 3s Lipo or something besides nicad/nimh or 2s lipo. If theis parameter is set to anything besides nicad/nimh, the controller will beep the error code unless the proper battery is plugged in. I struggled with this myself, but I think I have the quirks pretty much figured out.
The 160 amp controller is a sweet thing, by the way. Once the bugs/uirks are worked/figured out!

11:01 AM

I have the same issue with my MGM120A. It just beeps continuously. It is very frustrating as the controller is only 5 months old and has never been wet or over heated. I can't even get it into the programming mode. The controller was very sweet before all of this occurred.