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-   -   Viper RC - (https://www.rctech.net/forum/radio-electronics/455152-viper-rc.html)

bring it on 08-05-2012 04:09 PM


Originally Posted by KTMDirtFace (Post 11058360)
I just got a new Viper VTX10R and 17.5 motor combo.

I installed it in my blitz ese.
Radio Futaba 4pl
Servo Savox 1258 TG
77/28 gearing.

My problem is the ESC constantly resets itself. I have only driven it out in the street but I make a couple turns and i loose power and hear the ESC beeping like it just reset. It goes through the beeping tones and lights like the power was turned just turned on.

I'm not sure whats up all my connections are brand new and it seems fine. Any ideas?

Edit: Could it be LVC? how does the vtx10r behave at LVC? I just threw whatever battery I had which was at storage voltage in it.

I bet you it's the servo, change it out and retest

KTMDirtFace 08-05-2012 04:23 PM


Originally Posted by bring it on (Post 11058474)
I bet you it's the servo, change it out and retest

Why? its brand new I use the same servo in 2 other vehicles with no issues.
( Losi SCTE with viper copperhead, and another Blitz with Hobbywing SC8 and tekin pro 4 )

I will try though I guess.

bring it on 08-05-2012 04:29 PM


Originally Posted by KTMDirtFace (Post 11058515)
Why? its brand new I use the same servo in 2 other vehicles with no issues.
( Losi SCTE with viper copperhead, and another Blitz with Hobbywing SC8 and tekin pro 4 )

I will try though I guess.

I only say try that as I have 4 cars with viper esc in them and the only one that has a savox servo does the same thing to me once in a while.

DubDeuce386 08-05-2012 04:53 PM

Nikos
 
I just filled out my Warranty Center Form, i read that the receipt from when i purchased it has to be sent in with it. I purchased mine from a Small Hobby Shop in Daytona Beach called RREmodels and we did a Cash Deal no receipt. So is the Warranty Void without it?

KTMDirtFace 08-05-2012 05:26 PM


Originally Posted by bring it on (Post 11058537)
I only say try that as I have 4 cars with viper esc in them and the only one that has a savox servo does the same thing to me once in a while.

Hmm weird I charged my battery up and ran it in the backyard for about 5 minutes, didn't reset or shut off again maybe it was just hitting LVC really early? my pack was at about 3.7 volts per cell when it was cutting out. I forget what my LVC is set too. Time to bust out the manual to see what happens on lVC with this..it acted like the esc "rebooted" but I never lost steering when It happened.

bring it on 08-05-2012 05:32 PM

LVC will not reboot the esc. It would just start cutting power then it would just stop. I believe;)

No9 08-05-2012 06:17 PM


Originally Posted by DubDeuce386 (Post 11058610)
I just filled out my Warranty Center Form, i read that the receipt from when i purchased it has to be sent in with it. I purchased mine from a Small Hobby Shop in Daytona Beach called RREmodels and we did a Cash Deal no receipt. So is the Warranty Void without it?

I have done 2 warranty claims and had to have the receipt both times or no warranty as they are only covered for 12 months from time of purchase hence the need for a receipt.:nod:

No9 08-05-2012 06:22 PM


Originally Posted by KTMDirtFace (Post 11058710)
Hmm weird I charged my battery up and ran it in the backyard for about 5 minutes, didn't reset or shut off again maybe it was just hitting LVC really early? my pack was at about 3.7 volts per cell when it was cutting out. I forget what my LVC is set too. Time to bust out the manual to see what happens on lVC with this..it acted like the esc "rebooted" but I never lost steering when It happened.

Savox servos can draw up to 3.8 amps even at idle and the esc can only deliver a max of 3amps so it sounds like a brown out to me and it is more frequent when a pack is low.

goodhews 08-05-2012 06:41 PM

yea they def require a receipt..... I had copperhead issues like 2 weeks after they were released, and they wanted a receipt to show it was still in the 365 day replacement period.

bring it on 08-05-2012 06:50 PM


Originally Posted by goodhews (Post 11059061)
yea they def require a receipt..... I had copperhead issues like 2 weeks after they were released, and they wanted a receipt to show it was still in the 365 day replacement period.

LOL

dougwalter911 08-05-2012 08:21 PM


Originally Posted by KTMDirtFace (Post 11058360)
I just got a new Viper VTX10R and 17.5 motor combo.

I installed it in my blitz ese.
Radio Futaba 4pl
Servo Savox 1258 TG
77/28 gearing.

My problem is the ESC constantly resets itself. I have only driven it out in the street but I make a couple turns and i loose power and hear the ESC beeping like it just reset. It goes through the beeping tones and lights like the power was turned just turned on.

I'm not sure whats up all my connections are brand new and it seems fine. Any ideas?

Edit: Could it be LVC? how does the vtx10r behave at LVC? I just threw whatever battery I had which was at storage voltage in it.

U need to get a power cap for your reciever they are 10 bucks and take out all glitching with savox servos and esc.

wrightcs77 08-05-2012 08:56 PM


Originally Posted by wrightcs77 (Post 10986571)
Ok, not trying to sound mean, but my Viper is slow as doggy do do....lol. I bought a Copperhead 3900 kV. I am comparing it to the Castle 3800 system I also run. I run it in a Losi SCB. I don't race, but just run on outdoor tracks only, so no street bashing or speed runs. Only run on 2s. The thing lacks a little punch and then gets about 15' down the straight and flat out falls on it face. Like an old four stroke, just no revs. Geared 21/86. Temps are cool (never over 120 on motor). I gear my Castle the same and it flat out rips. I mainly bought the Viper for the hand held programming ease. For what I do, I don't want to carry a laptop. I like to go to 3 different outdoor tracks and would like the ability to change settings for each. I do have the Progauge.

Batteries are 6000 mAh, 65c in case someone wants to know.

Well, I swapped in a Castle motor and it rips. I think the motor is just a dog.

I will be keeping the Castle motor in and Viper esc. I like the ability to adjust the esc without a computer. I also like the power of the Castle motor, so I guess I will just keep both in:nod:

KTMDirtFace 08-05-2012 09:28 PM


Originally Posted by dougwalter911 (Post 11059459)
U need to get a power cap for your reciever they are 10 bucks and take out all glitching with savox servos and esc.

Why do you think it glitches with the vtx10r? is this a known issue?

It doesn't glitch at all with my viper copperhead.

I don't buy random powercaps/glitch busters...if it needs that I'll get a ESC that works correctly and sell this one.

No9 08-05-2012 10:53 PM


Originally Posted by KTMDirtFace (Post 11059642)
Why do you think it glitches with the vtx10r? is this a known issue?

It doesn't glitch at all with my viper copperhead.

I don't buy random powercaps/glitch busters...if it needs that I'll get a ESC that works correctly and sell this one.

You have to remember the copperhead is not having to run a sensor board .
The reason it may well be your savox causing the issue is that it is trying to draw more than the available current. Your rec runs on say 6vlts at maybe 500mah-1amp and then your savox is trying to draw its power and between the sensor board -rec-and servo there is a power drop which resets the esc.
Its not a glitch or a non operating esc but a servo that draws to much power.
This same issue happens a lot with spektrum recs when used with savox servos.
I had to add a power cap to a friends car on the weekend because of this he was using a Orionr10 and has the same issue with his Tekin but not when using futaba servo .Just trying to help.:nod:

Badger5 08-06-2012 12:20 AM


Originally Posted by KTMDirtFace (Post 11058360)
I just got a new Viper VTX10R and 17.5 motor combo.

I installed it in my blitz ese.
Radio Futaba 4pl
Servo Savox 1258 TG
77/28 gearing.

My problem is the ESC constantly resets itself. I have only driven it out in the street but I make a couple turns and i loose power and hear the ESC beeping like it just reset. It goes through the beeping tones and lights like the power was turned just turned on.

I'm not sure whats up all my connections are brand new and it seems fine. Any ideas?

Edit: Could it be LVC? how does the vtx10r behave at LVC? I just threw whatever battery I had which was at storage voltage in it.


I think first of all you should try it with a fully charged known good battery, and then see if the light on the receiver goes out as well, as if the receiver has browned out with under voltage. To do this you may have to run your buggy with the shell off. Normally if you have brownout issues the receiver has to reboot as it has cut out due to under voltage. But Futaba and Airtronics/Sanwa receivers are usually pretty good for this. If this does happen then normally the ESC will not need to reboot, but will go to failsafe.
The BEC on my VTX10R seems to be very robust, probably even stronger than my Tekin RX8. I have a Savox 1256 that I now use as a spare and this caused all sorts of receiver brownouts when I was using Spektrum radio in my Serpent, but was a lot better when I changed to Sanwa. In my Cat with the VTX10R I can use the Savox with Spektrum or Sanwa.
Savox servos are notorious for being power hungry and causing brownout isssues, particularly with Spektrum radios.
But for a quick check could you try another servo, preferably not Savox?

I think you should also double check all connections again, maybe a dry joint or a loose connector? From what you described it sounds like to me that the ESC has lost power from the battery and not the signal from the receiver.
I doubt that it's LVC as normally an ESC will either stop or go to 50% power when it hits LVC. But what battery are you using, I presume it is a Lipo? Maybe the battery is bad? I'm not sure what the Viper does with LVC but I would be surprised if it re-booted. Do you have a pro gauge, then check what the LVC is set to. 6.4V is a good starting point for 2S. You could then also check what the BEC voltage has been set to, I think default is 6V which should be ideal for your set up.


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