Power cutting off PLEASE HELP!

[MRCCRAWLER1.9]

hey guys, so in my XR-10, i have a slight issue..


when i reengage 4wd, from front or Rear dig, the RX system cuts-off for amoment and then comes back to life under the control of the TX..


whats the issue?? PLEASE HELP!

im running:
Novak m2 dig ESC
DX3R+SR300 RX
7950th servo, set at 6.0V with Castle BEC

[Charlie-III]

I would check all electrical connections, starting from the battery. I had a similar issue caused by a bad power connection, things would work fine, then dead....

With power on, twist/pull connections and see if the RX stays on.

[CreepyCrawl]

Sounds like it may be over drawing at the moment you re-engage the second motor which is causing your Rx to cut out.

Besides checking all your connections you could also try raising the BEC voltage...both the servo and Rx are more than capable of handling a higher input.

[MRCCRAWLER1.9]

Originally Posted by Charlie-III

I would check all electrical connections, starting from the battery. I had a similar issue caused by a bad power connection, things would work fine, then dead....

With power on, twist/pull connections and see if the RX stays on.

This is the first thing I checked, the bats didn't have such good connection, resoldered, but no luck.

Well I think I'm going to be switching to deans instead of traxxas. Traxxas plugs may bounce out of contact, cutting off..

[MRCCRAWLER1.9]

Originally Posted by CreepyCrawl

Sounds like it may be over drawing at the moment you re-engage the second motor which is causing your Rx to cut out.

Besides checking all your connections you could also try raising the BEC voltage...both the servo and Rx are more than capable of handling a higher input.

What voltage on the bec should I set it too? I've just heard 6.0v is the best for long life with the 7950.

Btw would adding a capacitor help alittle? Smooth out the flow more?

[Charlie-III]

Originally Posted by MRCCRAWLER1.9

This is the first thing I checked, the bats didn't have such good connection, resoldered, but no luck.

Well I think I'm going to be switching to deans instead of traxxas. Traxxas plugs may bounce out of contact, cutting off..

I was looking/suggesting the mechanical connections more than soldered. A poor fitting battery connection could do it as well as a bad connection into the receiver.
Also make sure no wires are under tension when the chassis flexes. A few others on this forum have had plugs getting pulled when the suspension moved causing intermittants in electrics operation.

[Greatscott]

Originally Posted by MRCCRAWLER1.9

What voltage on the bec should I set it too? I've just heard 6.0v is the best for long life with the 7950.

Btw would adding a capacitor help alittle? Smooth out the flow more?

I am running the same thing as you are, my CC BEC is set to 6.5v. That provides plenty of power to the RX and servo w/o over stressing it if it gets bound up. Other than glitching caused by the M2 under firmware 1.0, I have not had any of the problems you are describing. Are you running 2S or 3S?

[MRCCRAWLER1.9]

Originally Posted by Charlie-III

I was looking/suggesting the mechanical connections more than soldered. A poor fitting battery connection could do it as well as a bad connection into the receiver.
Also make sure no wires are under tension when the chassis flexes. A few others on this forum have had plugs getting pulled when the suspension moved causing intermittants in electrics operation.

mechanical connections?? what is that?


all my plugs into the RX have free movement. so that takes away from that.

[MRCCRAWLER1.9]

Originally Posted by Greatscott

I am running the same thing as you are, my CC BEC is set to 6.5v. That provides plenty of power to the RX and servo w/o over stressing it if it gets bound up. Other than glitching caused by the M2 under firmware 1.0, I have not had any of the problems you are describing. Are you running 2S or 3S?

hmm maybe im using the older firmware, but does the older cause the M2 to cut-off power, and then come back?

ill try running 6.5v.

im running 2s.

[Charlie-III]

Originally Posted by MRCCRAWLER1.9

mechanical connections?? what is that?


all my plugs into the RX have free movement. so that takes away from that.

Mechanical connections = plugs
A poor fitting connection can break the flow of power when moved a bit, "loose" connections are usually NOT good.

[MRCCRAWLER1.9]

Originally Posted by Charlie-III

Mechanical connections = plugs
A poor fitting connection can break the flow of power when moved a bit, "loose" connections are usually NOT good.

wait, this makes no sense, you need to solder plugs onto the pos/neg wire..? or am i not getting something here.

Yea, this is my reason for switching to Deans now. easier to solder.

[Greatscott]

Gunna ask a dumb question here, but....

Did you remove the red wires from both leads going from the M2 to the RX?

[MRCCRAWLER1.9]

Originally Posted by Greatscott

Gunna ask a dumb question here, but....

Did you remove the red wires from both leads going from the M2 to the RX?

dont sweat it, it wasnt a dumb question.

but yes, i did remove both red wires from the M2 to the RX

[Charlie-III]

Originally Posted by MRCCRAWLER1.9

wait, this makes no sense, you need to solder plugs onto the pos/neg wire..? or am i not getting something here.

Yea, this is my reason for switching to Deans now. easier to solder.

Deans are a mechanical connection (not soldered), if they fit loose, you can have an intermittant.
All your plugs are mechanical connections, they MUST fit snug to pass full voltage/current and have no intermittants.

[MRCCRAWLER1.9]

Originally Posted by Charlie-III

Deans are a mechanical connection (not soldered), if they fit loose, you can have an intermittant.
All your plugs are mechanical connections, they MUST fit snug to pass full voltage/current and have no intermittants.

ohh gotcha.

yea, i just ran with the deans! im not seeing any issues!

screw traxxas plugs, their POS!

oh, but new issue, it now only happens when the battery is close to LVC, and also, it seems to be that the Rear still has issues. the front have no issues now, until LVC

[MRCCRAWLER1.9]

So I did everything in my reach, soldered on deans and set the bec to 6.5v.

Once I swithed to deans the issue got better, but was still there, so I upped my bec to 6.5v and there is no change from adding deans.

[94s10blazin]

just a thought but if the dig is moved by a servo check your servo . my 3 day old scx10 started shutting down when i was steering! new servo put a stop to it

[MRCCRAWLER1.9]

Originally Posted by 94s10blazin

just a thought but if the dig is moved by a servo check your servo . my 3 day old scx10 started shutting down when i was steering! new servo put a stop to it

definitely not that, im using an electronic dig, rather than a mechanical dig since im using it in a MOA crawler.

but thanks for the in put