my bec or esc seems to lose power... help

[helhedded]

Whenever I start up with a fresh pack, the led on my CC BEC flickers like it isn't getting full power. When I turn my ESC on and get ready to drive, the truck stutters, doesn't drive and while this is happening I can see the led on my RX going on and off. After this happens, I have full power and the rest of my run is smooth. I checked my solder points where by BEC is inline with my esc power wires and they are fine. I even re-did them to make sure. Keep in mind this only happens at start-up.

any idears?

8 cell 1500 2/3a
CC Sidewinder
CC BEC wired like the updated diagram from CC
Spektrum Dx3 with sr3000 rx

[helhedded]

to reiterate, I noticed that this probelm was also prevelant when I was in a bind, and when there was alot of strain on the motor. after some emails with Joe Ford at Castle Creations, he recommened this.

http://www.horizonhobby.com/Products...ProdID=SPM1600

this little puppy helped, and so far I haven't had that problem any more. This is a really cheap fix to hold you out until you can do the lipo upgrade.

edit : to anyone who gave a shat

[HomerJ]

Did you ever find out what the problem was exactly? Only reason I ask is if someone else is having the same problem and is running a dig unit or something else in the aux port on the rx, they're not going to have any place to plug that bad boy up at...

[RaleighRCer]

When I first turn on my sidewinder, it seems to take a few seconds program itself. I just wait until the blinking lights go solid, then all is good. If you try to gas it before its done calibrating, it will glitch like crazy. It never seems to take more than 5 sec though.

[helhedded]

Originally Posted by HomerJ

Did you ever find out what the problem was exactly? Only reason I ask is if someone else is having the same problem and is running a dig unit or something else in the aux port on the rx, they're not going to have any place to plug that bad boy up at...

I thought about that as well. Im thinking maybe if I go Lipo, the voltage drop at full throttle won't be as bad, and the rx will stay powered. That's the only fix I can think of. It doesn't seem right, since alot of people seem to run 8 cell 2/3a 1500 packs a lot. As of now I'm trying anything and everything to fix the problem.

[Nova's Ark]

If you go lipo, you better get a high C rating. I have a BM16 brushless outrunner I cannot run in my 2.2 comp crawler. The small 1320 Lipo I run on the crawler will not hold up to power draw. I had to install the BM16 into a different crawler that can use a higher rated lipo or NiMh pack.

When I ran the BM16 in my 2.2, when the crawler would get bound up, the receiver would time out. I am running a DX6, AR6000, CC BEC, Hitec 5955 TG, & Hitec 645MG. It came down to the lipo not keeping up with the amp / voltage draw of everything in a bind. When I swapped the BM16 for a CrawlMaster Sport, the problem went away.

I can run that BM16 in my son's 2.2 crawler powered by an 8 Cell 2/3A pack no problem. Everything is the same electronics wise as mine, except he runs a Futaba 3PM FM TX and RX. No issues. Running the Spektrum Capacitor will help, assuming you have space for it.

[helhedded]

^ thanks for the helpfull tip!

[mach2nh]

Originally Posted by HomerJ

Did you ever find out what the problem was exactly? Only reason I ask is if someone else is having the same problem and is running a dig unit or something else in the aux port on the rx, they're not going to have any place to plug that bad boy up at...

Dont see why you cant get a Y cable and run that off the same port..

[helhedded]

Sorry for never posting the results, but I ended up powering both servos directly from the bec, and the signal wires are the only wire going through my RX. This was all possible with a custom all female Y harness. This allowed me to still use the capacitor on my RX. I've had no problems with the system since.

[trainer]

Originally Posted by mach2nh

Dont see why you cant get a Y cable and run that off the same port..

Did not work for me, still brown'd out the rx.

I got the same problems. Originally run a 55t, 7 cell 2/3, Novak rooster crawler, 645MG and DX3 with a SR3000. No problems. After adding a dig and a 225MG servo it started to glitch. Charlie at Novak recommended the same capacitor explaining that the added draw on the battery was too much for the spektrum rx. It helped a lot, but still occasionally the servos would glitch, mainly under WOT. Not such a problem for a crawler.

Then I upgraded to a 2S 1600mah lipo and added the CC bec at 6.0v whilst waiting for my sidewinder. Plugged the bec on the bat slot as per the CC instructions. Unplugged the red wire from esc. Now, even with lipo, the rx would shut down every now and then under load. Added the cap on a y harness, did not help. Actually, it died for longer periods.

Now, when I'll get the sidewinder and my 45t HHH, I'm gonna first try the CC way to plug in the bec, and if it still cuts I'm gonna try powering the steering servo with the bec and plugging the cap on the rx.

So much for the "glitch free 2.4" I wonder if other brand rx's are as sensitive to voltage...

[helhedded]

I think it's just this sr3000 model. if you run it the way I ran mine, you won't have any problems.

[mudboger07]

Originally Posted by helhedded

I think it's just this sr3000 model. if you run it the way I ran mine, you won't have any problems.

I think it's actually with all spectrum radios, i had the same issue on my super with the dx6 rx shutting down under a load...but after wiring it liek this all the problems went away.......

[bob1961]

this last picture doesn't have any plug in the batt port on the RX, so how is the RX getting power....the only way i see it's possible is through the ESC cause the has power going to it................bob

....

[helhedded]

Originally Posted by bob1961

this last picture doesn't have any plug in the batt port on the RX, so how is the RX getting power....the only way i see it's possible is through the ESC cause the has power going to it................bob

....

correct- The esc powers the rx. The available battery slot can now be used for that capacitor.

[Locked Up]

I actually seem to be having this problem with a 3s 3-c lipo wired as you described.

Maybe I still need the cap?

[Grizzly4x4]

I had problem when my CC BEC was plugged into the RX's battery port. I could actually see the RX light go out when it would "brown out".

I changed the wiring so that the steering servo (HS5955TG) was powered directly off the BEC but the dig servo (HS-82MG) was powered through the RX. That fixed everything. My dig servo just activates the switches for the motors on my Clod axles so there is very little load on it.

The cap is a band aid. It helps, but the real problem can be addressed with wiring. That said, the cap certainly doesn't hurt anything once the wiring is right.

Mine's wired like this:
Definitive wiring diagrams for BECs Rx Servos Motors etc.

[Locked Up]

Originally Posted by Grizzly4x4

I had problem when my CC BEC was plugged into the RX's battery port. I could actually see the RX light go out when it would "brown out".

I changed the wiring so that the steering servo (HS5955TG) was powered directly off the BEC but the dig servo (HS-82MG) was powered through the RX. That fixed everything. My dig servo just activates the switches for the motors on my Clod axles so there is very little load on it.

The cap is a band aid. It helps, but the real problem can be addressed with wiring. That said, the cap certainly doesn't hurt anything once the wiring is right.

Mine's wired like this:
Definitive wiring diagrams for BECs Rx Servos Motors etc.

That is exactly how mine is wired.

It appears that my RX light doesn't go out. The light stays on the whole time, but my servo just doesn't seem to want to do the work it used to (even the brand new one).

[One-eyed Jack]

Originally Posted by mudboger07

I think it's actually with all spectrum radios, i had the same issue on my super with the dx6 rx shutting down under a load...but after wiring it liek this all the problems went away.......

I had a lot of the same problems all you guys when I was using the stock steering servo and a couple of other Hitec servos. I put a JR 9100t on the steering and all of my rx shutdown went away. I even run LED lights at 50ma. This on the Rooster Crawler bec which is only rated at 1.5 amps. Spetrum sr3000 rec. Dual esc and motors. My theory is your st servos are staying in locked rotor because they don't have enough power to do the job. When I tell it to turn it TURNS right then. If the wheel is up against a rock or wall it pushes the truck away from the wall and turns. Maybe I have the ONLY sr3000 that is worth a damn. Lucky me!!!!!

[helhedded]

Originally Posted by Grizzly4x4

The cap is a band aid. It helps, but the real problem can be addressed with wiring. That said, the cap certainly doesn't hurt anything once the wiring is right.

X2