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-   -   MMM with NO tone and nothing sended to the motor!!! ? (https://www.rc-monster.com/forum/showthread.php?t=15678)

Emaxx_Quebec 10.06.2008 10:52 AM

MMM with NO tone and nothing sended to the motor!!! ?
 
I tried to calibrate my MMM ( first one, V2).
When I plugged the batts, (4s2p4000)i saw a very little wite smoke comming out near the del light.
I unplug evrythingright away.
When I tried again, there was no tone at all from the MMM BUT seem to calibrate correctly exept sending signal to the motor. ( it's suppose to vibrate a little, but notting!!! When i pull the trigger, green and yellow del light, full brake, red and yellow light, neutral, yellow only, BUT the motor is not spinning at all !!!
Brand new 9xl motor.
Is there a way to verify if a brushless motor is still good like when we connect + and - to a 9v to a brushed motor to see if he's still spinning?
Thanks

Arct1k 10.06.2008 11:47 AM

You can connect a 1.5v AA battery across each phase it should turn the motor/magnet over to the next phase.

auto2 10.06.2008 11:52 AM

if you saw smoke i would think a call to castle is in order?

JaySki 10.06.2008 01:55 PM

Quote:

Originally Posted by Emaxx_Quebec (Post 219834)
I tried to calibrate my MMM ( first one, V2).
When I plugged the batts, (4s2p4000)i saw a very little wite smoke comming out near the del light.
I unplug evrythingright away.
When I tried again, there was no tone at all from the MMM BUT seem to calibrate correctly exept sending signal to the motor. ( it's suppose to vibrate a little, but notting!!! When i pull the trigger, green and yellow del light, full brake, red and yellow light, neutral, yellow only, BUT the motor is not spinning at all !!!
Brand new 9xl motor.
Is there a way to verify if a brushless motor is still good like when we connect + and - to a 9v to a brushed motor to see if he's still spinning?
Thanks

That, I would say, is the tell tale sign of a Burnt BEC circuit.

Emaxx_Quebec 10.06.2008 02:10 PM

Quote:

That, I would say, is the tell tale sign of a Burnt BEC circuit.
Yes but the servo still working and the motor doesn't:diablo:
I'll give CC a call tonight.

JaySki 10.06.2008 02:50 PM

Quote:

Originally Posted by Emaxx_Quebec (Post 219881)
Yes but the servo still working and the motor doesn't:diablo:
I'll give CC a call tonight.

If you got smoke.. Something burnt.

No tones and nothing to the motor, try checking your solder joints in the wiress to the motor. might have a cold joint.

DRIFT_BUGGY 10.06.2008 03:22 PM

Have you got the plug from the MMM plugged into the RX the correct way around?

Arct1k 10.06.2008 03:25 PM

It sounds more like shorted phases and FET failure from the connectors against the heatsink. The MMM needs to go back - I thought the issue was more if it took the motor out in the process...

Emaxx_Quebec 10.06.2008 03:28 PM

Same than my servo.
Is the way it connect to RX change something on the srevo. ( turn right and ge left ...)

BrianG 10.06.2008 03:28 PM

Brand new setup? Were the motor screws too long? If two screws bit into the coils, the motor can could short out the ESC blowing a phase. No matter what, I would have the ESC looked at if there was smoke in ANY area!

While you're at it, do a continuity test between each motor phase and the motor can (there should be ~infinite resistance).

BrianG 10.06.2008 03:29 PM

Quote:

Originally Posted by Emaxx_Quebec (Post 219913)
Same than my servo.
Is the way it connect to RX change something on the srevo. ( turn right and ge left ...)

Servo going the wrong way is fixed by reversing the radio steering channel...

Emaxx_Quebec 10.06.2008 03:38 PM

Yes brand new setup.


Quote:

While you're at it, While you're at it, do a continuity test between each motor phase and the motor can (there should be ~infinite resistance).

Help me to check that tonight.
Just to be sure, by
Quote:

each motor phase
you mean each wire.
red to wite, wite to black, black to red.
How I check that. That's my first brushless!

Thanks.

BrianG 10.06.2008 03:43 PM

Yes, each wire.

Actually, disconnect the motor from the ESC first. Test continuity between each motor wire (phase) to the motor case.

But also check the screw length to make sure they aren't touching the coils. I usually just gently screw in long screws by hand until I feel them touch the coils. Then, back them out a couple turns. This is the max length you should use (don't forget to account for the motor mount thickness).

Emaxx_Quebec 10.06.2008 04:05 PM

I use RCmonster heatsink that add a good spacer between motor and the plate, so no prob there I think.

killermmn 10.06.2008 06:01 PM

Quote:

Originally Posted by Emaxx_Quebec (Post 219834)
I tried to calibrate my MMM ( first one, V2).
When I plugged the batts, (4s2p4000)i saw a very little wite smoke comming out near the del light.
I unplug evrythingright away.
When I tried again, there was no tone at all from the MMM BUT seem to calibrate correctly exept sending signal to the motor. ( it's suppose to vibrate a little, but notting!!! When i pull the trigger, green and yellow del light, full brake, red and yellow light, neutral, yellow only, BUT the motor is not spinning at all !!!
Brand new 9xl motor.
Is there a way to verify if a brushless motor is still good like when we connect + and - to a 9v to a brushed motor to see if he's still spinning?
Thanks

i have been there!!
it a dead mmm you got there!!
send it to castle!!


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