MM arming on 5s?

[ilpufxit]

I know this has been talked about but I'm not clear on whether I can get a new MM to arm on 5s or not. Mine makes the right noises and the led's respond to the tx but no motor. I've re-programmed from the tx and updated the firmware. If I can't get past this, I'll just have to gear up a little and stick with 4s.

[sleebus.jones]

From what I've heard, if you set the cutoff to "no cutoff" it will work properly.

[ilpufxit]

Originally Posted by sleebus.jones

From what I've heard, if you set the cutoff to "no cutoff" it will work properly.

I tried that, I tried the same on my other MM, same thing. They work perfectly on 4s but on 5s, no go.

[teknorc]

I have an older Mamba that I'm running 5s on. I had a similar issue. I adjusted the new 'arm time' to the lowest possible, 1 second I believe, and I think it helped.

[Finnster]

Uh-oh, did this get changed in the new firmware? I have an older MM that runs 5S well. I gen don't use it for that, but its nice to have. I updated the firmware, so I wonder what it will do now...

[jhautz]

I have one older MM that is slightly sensitive on the overvolt on 5s. It works perfectly if I change my charger setting to charge to 4.15v per cell (20.75v for the pack) rather than 4.2v per cell. If I charge the pack all the way to 21V it doesnt want to start. I need to drain 100mah off the top of the pack and then it works perfectly. The other MMs I have arent bothered by 5s and work perfectly. These are all the older style though.

Try seeing if a not quite completely peaked 5s pack will let tthe MM start up.

Originally Posted by Finnster

Uh-oh, did this get changed in the new firmware? I have an older MM that runs 5S well. I gen don't use it for that, but its nice to have. I updated the firmware, so I wonder what it will do now...

I've had no issues on mine after the upgrade. At least no issues that werent there before the upgrade.

[GriffinRU]

But I have a solution which will solve all problems including LiPo support (cutoff) for 5S and 6S.
I won't recomend running above 6S or 26V.
Picture located here.

[dadnjesse]

Originally Posted by GriffinRU

But I have a solution which will solve all problems including LiPo support (cutoff) for 5S and 6S.
I won't recomend running above 6S or 26V.
Picture located here.

Do you have the specs on that cap that you soldered on!

[GriffinRU]

Originally Posted by dadnjesse

Do you have the specs on that cap that you soldered on!

1800uF 35V
16x25mm
3820mA/0.014Ohms at 105C 100kHz

[GriffinRU]

Originally Posted by GriffinRU

But I have a solution which will solve all problems including LiPo support (cutoff) for 5S and 6S.
I won't recomend running above 6S or 26V.
Picture located here.

DON't TRY this setup!!!

I encounted serious problems with this setup, not quite sure why. But I do need to investigate, it cogs like crazy at mid to high RPM...

Sorry, update will follow.

[dadnjesse]

Originally Posted by GriffinRU

DON't TRY this setup!!!

I encounted serious problems with this setup, not quite sure why. But I do need to investigate, it cogs like crazy at mid to high RPM...

Sorry, update will follow.

Thanks keep us informed

[suicideneil]

Call me stupid, but if you ignore the extra $$, isnt it easier to just disable the built-in lipo protection and use a seperate lipo monitoring device (LVC)?

[GriffinRU]

Originally Posted by suicideneil

Call me stupid, but if you ignore the extra $$, isnt it easier to just disable the built-in lipo protection and use a seperate lipo monitoring device (LVC)?

Yes, you are correct.
I am just tiring to get a little bit more from well designed MM ESC...

-but looks like this one requires to get a closer look at brains pcb, I missed something. Once you get over lower battery voltage, with PWM, ESC fails to work.
I can see how that can happen, but not quite sure what it’s for...

[ilpufxit]

I'm still not clear on this one. Can I go back to the older software and run 5s? I see lots of people are running 5s and my setup would like 5s but the MM won't arm.

[jhautz]

The older MM units will arm on 5s. The newer ones will not. The version of sotware doesnt matter from what I understand. Its in the controller itself.

If you have a new one I believe that you may be able to make it arm on 5s by turing off the LVC. I dont know this to be true becasue I dont have a newer MM to test it with, but this is what I have heard on the board here. If you try it and it doesnt work then you will likely need to get a ESC that was designed to work with 5s if thats what you need. Or possibly find a used older style MM.