MGM 22418 & 6S LiPo is No GOOD

[tashpop]

agreed, that thing has some nuts. just get rid of that cogging

[What's_nitro?]

Hey aalzuhair remember way back when you posted the setting of your controllers? I noticed that you had free-wheel disabled. I've skimmed through the thread and I haven't seen anyone mention it so I thought I would point that out. If you noticed cogging on deceleration but not acceleration, that is why. The controller brakes very hard as it tries to regulate the speed or the motor. If you were driving at high speed and decelerated enough to engage the "speed brake" the controller may have been overloaded by the sheer number of braking voltage spikes sent back from the motor. Having a slotted stator helps to couple the magnetic field of the rotor into the stator windings and can produce a very powerful current spike. In a nutshell, if you accelerate to a speed in 3s, and then brake to a stop in 1s, the controller sees 3 times as much current during braking as it did accelerating. This could have caused both of your controllers to blow.

Originally Posted by What's_nitro?

Hey aalzuhair remember way back when you posted the setting of your controllers? I noticed that you had free-wheel disabled. I've skimmed through the thread and I haven't seen anyone mention it so I thought I would point that out. If you noticed cogging on deceleration but not acceleration, that is why. The controller brakes very hard as it tries to regulate the speed or the motor. If you were driving at high speed and decelerated enough to engage the "speed brake" the controller may have been overloaded by the sheer number of braking voltage spikes sent back from the motor. Having a slotted stator helps to couple the magnetic field of the rotor into the stator windings and can produce a very powerful current spike. In a nutshell, if you accelerate to a speed in 3s, and then brake to a stop in 1s, the controller sees 3 times as much current during braking as it did accelerating. This could have caused both of your controllers to blow.

Seam to be logic.....

Originally Posted by What's_nitro?

Hey aalzuhair remember way back when you posted the setting of your controllers? I noticed that you had free-wheel disabled. I've skimmed through the thread and I haven't seen anyone mention it so I thought I would point that out. If you noticed cogging on deceleration but not acceleration, that is why. The controller brakes very hard as it tries to regulate the speed or the motor. If you were driving at high speed and decelerated enough to engage the "speed brake" the controller may have been overloaded by the sheer number of braking voltage spikes sent back from the motor. Having a slotted stator helps to couple the magnetic field of the rotor into the stator windings and can produce a very powerful current spike. In a nutshell, if you accelerate to a speed in 3s, and then brake to a stop in 1s, the controller sees 3 times as much current during braking as it did accelerating. This could have caused both of your controllers to blow.

I did notice some cogging, but I can’t remember if it was on acceleration or deceleration … I can’t remember … At any rate, thanks for the info, I will enable the free-wheel next time

OK you tell me that the address is on their web site..

Thank you!

[mxracer]

well i have sent them multiple emails from 2 different email addresses about my problems and i havent heard back at all !!
maybe someone here could help me. i got a usb com , just wondering if there is led lights that comes on the device? because i cant seem to get that to communicate with any of my 4x mgm esc's or either of my 2 computers

Originally Posted by mxracer

well i have sent them multiple emails from 2 different email addresses about my problems and i havent heard back at all !!
maybe someone here could help me. i got a usb com , just wondering if there is led lights that comes on the device? because i cant seem to get that to communicate with any of my 4x mgm esc's or either of my 2 computers

Make sure that you check your Spam/Junk e-mail folder, because I had the same thing happen with me and then I checked my spam folder and there it was :)

Originally Posted by mxracer

well i have sent them multiple emails from 2 different email addresses about my problems and i havent heard back at all !!
maybe someone here could help me. i got a usb com , just wondering if there is led lights that comes on the device? because i cant seem to get that to communicate with any of my 4x mgm esc's or either of my 2 computers

You have the batteries connected to the ESC and the ESC is turned on ? Sometimes I need to power the ESC on/off once or twice before the controller program shows the ESC as on-line.


J.

[mxracer]

yes i checked in junk mail of both emails , im thinking my emails are going into his junk mail ?

and with the usb com yes ive powered everything up multiple times , tryed reciever packs , power from ubec , everything . ive trying nearly every combo i can think of , and no led lights work and because it doesnt connect with computer the install program cant even complete ! there must be something wrong i have over looked

Update:

Ok I just the two in and I checked one and it was working fun with 3s (de-attached motor and testing both forward and brakes) but I want to try it with 6s but before I do that I want to video tape the settings and the testing with 6s .. because I'm a bit worried to just run 6s :)