MGM TMM28026-3 Esc???

[Anders Martinelle]

Finally i got my MGM Esc.
Tested it today and it cutts all the time and i have no clue why it would that???
Is there anyone else that have seen this behavor?
Have 2 pics on how the logg looks like?
First one is zoomed in.

Anders

[RaceMechaniX]

Anders,

It is likely the phase current protection system kicking in. The MGM's have several safeties including several over currents and over temperatures. Instead of viewing the data in the built in MGM window, save the data as an excel file. Open the data in Excel and you will see preformatted columns of data including much more than the simple view you see.

28026-3 screenshot.jpg

Columns R through X are the faults. Scroll down through your data and see if any of these columns have a value in them. This would indicate a protection fault has been enabled.

If you post your set-up and/or are willing to post the excel data we can be of more assistance.

Tyler

[Meniscus]

Agreed. With the number of programming parameters, it could be a variety of issues: throttle range, incorrectly set number of poles, etc. etc. If you are willing to share, then we can quickly provide recommendations based on what we see. Based on the model number you provided, is this the version with BEC?

[Ralf]

Hi,
Looks like commutation loss. What Motor Do you use?

[Anders Martinelle]

Thank`s for that info Tyler, will do that and post or let you know tomorrow.
I have followed the "video info" on youtube that MGM has and every setup so far i have done according to those videos.
My setup is as follows: 1pc. 3,3A Turnigy 65C acc connected to the Esc and in the other end the motor i have tested today is SkyRc Toro SC 4000kv and 4600kv 4pole and Toro 8X 2650kv 6pole.
Also tested with 2x 3,3A Turnigy 65C acc also w/o any difference.

Just to compare i ran all motors with a Turnigy K-force 150A Esc w/o any problem also with 1 and 2pc 3,3A Turnigy accs.

Setup in the Esc is as the video tells you to do.
Things i tested just to see if there was any difference was to set the cell Count to 4 instead of automatic but no difference.
Also i set the poles according to the motors.
I run"car" setup mode but that should not make eny difference or??

Yes it has BEC.

All connectors are XT150 6mm.

Anders

[RaceMechaniX]

Anders,

I assume you have the MGM link since you have data, under the settings tab, select model 2 which is traditionally a boat set-up. I would not run in car mode because it has brakes which can cause damage to flex cables on sudden deccels.

Check that you radio has the end point adjustment up to 100% minimum. The auto lipo detect is usually the best option as is the 78% of starting voltage for the cut-off. If you are testing these motors on the bench you should not be pulling significant amperage. Also set the timing to 5 Deg and Frequency to 8kHz. These settings usually work for most motors.

The pole count makes no difference, just adjusts the RPM in the data.

TG

[Anders Martinelle]

Yes i have the link.
At the moment i`m testing it on the bench and then i use prop for load.
But i`m into that there is something with the phase current protection??
I read the manual and when this have happend the blue and orange led is blinking and of course in the manual it says that combo is free "not in use"???
But i will save it as Excel sheet and look for faults.

Anders

[Meniscus]

Are you setting the throttle endpoints on each run or have you set preset parameters in the programming? I've always set the throttle end points at the beginning of each run to arm. I know that others prefer to preset using the programming parameters, but I don't mind the extra drama when I'm at the pond.

On one of my MGM's, it acted like this when I mistakenly had it set for another motor that was 6 poles and switched to one that was 2 poles (I grabbed the wrong ESC out of the box). However, it only happened twice and I don't think that is your issue in this case. Most likely, it acted like this because of the setup I was running on 2s. Once I reset the poles with no other changes, it never did it again and I have 50+ runs on that controller since then with no issues.

Worst case, if we can't address your issue, I'll be happy to get you in contact with Martin at MGM. He'll be able to provide additional insight to get this issue resolved.

[Anders Martinelle]

I tested today to store it as a excel file and the only things i found in column Q one line: 10,063 and in column S two lines with the same: 10,168.
Pulse current was at the highest Point: 177Amp and max current at 144A.
Minimum voltage at all time was 14,17volt.
All numbers come from the log.

I have not been in Contact with Martin but that is mainly because he is on vaccation.

Anders

[RaceMechaniX]

Martin is very busy these days so it usually takes several days at minimum to respond.

I am sure why you have a input value in column Q. In mine this is cruise control.

Column S is the High Amp warning, this would indicate you hit a limit. Can you take a screen shot of the line where the 10,168 occurred. Looking for the input current, input request, incoming power, output power and pulse current.

Would be easier if you could attach the excel file.

TG

[Anders Martinelle]

MGM TMM28026-3 Esc???

I tried..........

[Anders Martinelle]

I can E-mail it to you if you want Tyler......
It`s limited to 1280x800pixels images.
Original pic is: 3279x2327 pixels .

Anders