problem with novak ballistic 21.5

[CRAWLERJOE]

So I put a new ballistic 21.5 motor in my scx10 with a mamba max pro esc! Everything worked great while on flat trail ( small ro is and roots) however, when I tried to crawl with it on some larger rocks it would start going and then act almost like it stalled. It will then roll backwards with no drag brake effect whatsoever!

I checked all the setting with castle link and the correct! Yes the sensor wire is plugged in ALL the way! Not sure if it could be a compatibility issue between motor and esc or not but I have seen a scx10 with a pro4 combo in it and it crawled amazingly well and still ripped when on the trigger!

Any suggestions?

[Ryan87zuk]

I remember searching for Novak issues and found a guy running a non Novak esc with Novak motor and he had issues with it. Other than that maybe make sure the wires in the sensor plug aren't damaged.

[moes670]

Been running that same motor ESC combo for a couple seasons with no issues. Don't think it is a compatibility issue. Can you take some screen shots of your settings and post them?

[CRAWLERJOE]

I already took the motor out and put a brushed one in It's place! I am just curious is another (different) motor will do the same thing or if anyone else has a similar problem and what they did to fix it!

[indiana mudcat]

It's Novak ESC's that won't work without thier "crawler" labeled motors. I don't have any issues with my MMP and a Novak 13.5 or another with an 18.5. Like said, screenshot of your settings please.

[Armistice]

I am actually running a Ballistic 18.5 with a MM Pro. I had a similar problem where it'd run on flat ground, but had no pull to climb. Sent it to Novak and when I got it back, they said 1-2 coils had shorted out. You might have the same problem

[indiana mudcat]

The 21.5 isn't as amp hungry as the lower winds, but what batteries are you using? Any chance it's hitting LVC? BEC? Possible brownout? The MMP BEC is super weak.

[CRAWLERJOE]

Originally Posted by indiana mudcat

The 21.5 isn't as amp hungry as the lower winds, but what batteries are you using? Any chance it's hitting LVC? BEC? Possible brownout? The MMP BEC is super weak.

It happens with 2s 20 c and 3s 25c

[indiana mudcat]

Originally Posted by CRAWLERJOE

It happens with 2s 20 c and 3s 25c

Mah? We need to know how many amps your packs pass. If under 2,000 mah that's probably your issue.

Do you have an external BEC?

[CRAWLERJOE]

Sorry don't know why I left that out.

The 2s packs are between 4000 and 5800 mah and the 3s packs were from my xr10 and are only 1300 mah

[Olle P]

I wonder if the motor's "electronic timing" is part of the issue?
It's supposed to be handled just fine by Novak ESCs, but how other brand ESCs handle it is beyond me...

[Charlie-III]

Originally Posted by Olle P

I wonder if the motor's "electronic timing" is part of the issue?
It's supposed to be handled just fine by Novak ESCs, but how other brand ESCs handle it is beyond me...

Like any other motor (brushed or brushless), set it to "0" timing or "slightly" advanced??

[indiana mudcat]

Those 2s packs should be plenty enough. Don't really think its timing, as I have and have seen the MMP/Novak combo a lot.

Do you have an external BEC? I'm about to assume no and point to that as the issue.

What battery connectors? Deans, Traxxas, something else decent or white Tamiya plugs?

[CRAWLERJOE]

Originally Posted by indiana mudcat

Those 2s packs should be plenty enough. Don't really think its timing, as I have and have seen the MMP/Novak combo a lot.

Do you have an external BEC? I'm about to assume no and point to that as the issue.

What battery connectors? Deans, Traxxas, something else decent or white Tamiya plugs?

it has deans connectors and your assumption is correct! I am not running a bec on this truck "yet"!

[CRAWLERJOE]

So the less than great bec in the mmp could be basically causing a low voltage issue to the motor?

[Twisted Nuts]

Not exactly, but when you put the system under a strain the rx will brownout momentarily. Put a Castle 10A BEC on it and call it fixed
Ive been running the MMP and novak motors since the mmp was released from castle, I have not had any problems out of any of my systems other than the weak internal bec.

[CRAWLERJOE]

So I am familiar with wiring them in using y harnesses! Do I set it to 6 volts and plug the bec into the battery port on the receiver? Sorry if that sounds noobish but this is a new one for me!

[Charlie-III]

Originally Posted by CRAWLERJOE

So I am familiar with wiring them in using y harnesses! Do I set it to 6 volts and plug the bec into the battery port on the receiver? Sorry if that sounds noobish but this is a new one for me!

That's the easy way.
If it's around 200inoz that's fine, if the servo is higher torque and can handle higher volts I would go direct to the servo.

[CRAWLERJOE]

Originally Posted by Charlie-III

That's the easy way.
If it's around 200inoz that's fine, if the servo is higher torque and can handle higher volts I would go direct to the servo.

So how does this help the motor?

[Charlie-III]

Originally Posted by CRAWLERJOE

So how does this help the motor?

The external BEC helps the motor as it takes the load off the ESC internal BEC.
Running the external BEC through the RX is the easy way to wire things up, I prefer direct to the servo.
If you have a lower torque servo, or, a servo that won't deal well with higher input voltage then running the external BEC through the RX is fine.