MGM esc programming problem

[triton]

Hi

May I need some help about the controllers programming?
Three MGM controller what I have and the same problem with all.
I use the default factory settings only a few parameters what I was changed. Like lipo cell, cut off voltage and the programmed throttle control.
The problem is when I pull full throttle, around the middle of the throttle position the ESC block the motor.
I was emailed with Martin from MGM and he said try to change the P16 parameter. This is the acceleration time or use a smaller prop. Now the p16 on 9.(default 1.5). So it's better but not the real one. The acceleration is too long time and need a "kilometer" for full speed
The setup:
Agitator XL cat
Twin 5660 tp
12s lipo
x457 props reduced to 52
250.63 x2 MGM

The other mono boat do the same with the 400.63 ESC.
I think something I do not do well.
Is there any idea what to do?

Regards Peter

[RaceMechaniX]

Peter,
What radio and receiver at you running? Do you have a servo tester that could replace the receiver and test the motor and controller using the tester to rule out the receiver/radio.

Also, which motors are you using?

Tyler

[triton]

Hi Tyler
Sanwa m11 and rx 441 receiver.
With no load the rpm goes to max.
Under load comes the limit.
With another futaba radio the same problem.

[RaceMechaniX]

Try setting the timing to a fixed value like 10 Deg instead of Autotiming.

[triton]

Timing 6 degrees
The motor type tp5660 7D
I know it is on the limit with 12S.
Is there a problem?

[Fluid]

Several guys in the local club reported seeing something similar with their HV MGM controllers. Throttle drops off after a short time, logging shows excessive amps even with proven setups, etc. These guys are not newbies. That’s all I know at the moment, odd.



.

[RandyatBBY]

Mine does the same thing on launch. I always roll in to the throttle lightly. If I seam to pull the throttle too quick it blocks/or stops it. Once I get to full speed I can then hammer it at any speed. I am running a 1530 .5Y MGM 400-63 and a 47MM prop on 4S3P in a 34 inch sport Hydro.

[triton]

I'm not happy to hear tha similar.
I was changed all the cheap controllers (like flier,hifei,turnigy) for mgm professional ESC. These are 4 times more expensive like the others, and now I cant pull a full throttle with a 400Amp Pro ESC. Incredible.

[RaceMechaniX]

1180kv is pretty hot for 12S. I am not too surprised. You are likely seeing current limiting due to high phase currents.

Does it do the same behavior on 6, 8 or 10 cells?

[triton]

Not yet.
Next time I will try with 10s and share the experience.
Do you know how does the controller measure the peak and the input current?
Because after last track the peak was 810 amper, the input was 237 amper.

[RaceMechaniX]

The MGM's track both DC input current and AC phase current. With hot motors, it's usually the phase current which will cause them to start current liming.
And if your data is showing 810A AC peak, then that is too much.

Tyler

[rayzerdesigns]

I have had same issues with the mgm.. if u haven’t updated the firmware please do. It helps but does it eliminate it.. I’m not happy with mine either

[triton]

I found another topic on OSE, and the guy who uses D wind motors like me, has the same problem. He said will try lehners but no response from him yet.
Possible the MGM does not work well with the D wind motors?

[photohoward1]

800amps? 12s on a 100 KV Motor? Why?

[triton]

800amps? 12s on a 100 KV Motor? Why?

This came from the controller databox. This is the peak current. The input current much lower.
I dont know how.
The motor 1188kv.