Viper RC -
Tech Rookie
Joined: Jul 2014
Posts: 4
Viper support was quick to get back to me. They suggested the behavior was consistent with reaching the low voltage cutoff (LVC), and to make sure the lipo cells were balanced.
I did a good long balance charge last night. Tonight is club racing so I brought my meter to check the cells after each heat.
I also plan to increase the motor temp cut-off to 240F or maybe even disable it in an effort to troubleshoot the glitching.
I'll report back if I make any discovery's. Thanks for the feedback!
I did a good long balance charge last night. Tonight is club racing so I brought my meter to check the cells after each heat.
I also plan to increase the motor temp cut-off to 240F or maybe even disable it in an effort to troubleshoot the glitching.
I'll report back if I make any discovery's. Thanks for the feedback!
Tech Fanatic
iTrader: (26)
Joined: Jul 2012
Posts: 914
I don't know about "not good". I run the vtx-10r in my 2wd sct and don't run much brake anyway. I have the esc at 100 and turn the radio down to between 60-80. just enough to get the nose down if needed. I haven't had any issues with the brakes not stopping the car. I run on medium outdoor and indoor track. The set up I am currently using and really like is Travis Amezuca's 2wd setup on pettitrc. I haven't changed it since. lol.
When you set the brakes to your liking they are as good as any on the market. Plus there is a lot of adjustability, so you can really find the settings you like.
Viper support was quick to get back to me. They suggested the behavior was consistent with reaching the low voltage cutoff (LVC), and to make sure the lipo cells were balanced.
I did a good long balance charge last night. Tonight is club racing so I brought my meter to check the cells after each heat.
I also plan to increase the motor temp cut-off to 240F or maybe even disable it in an effort to troubleshoot the glitching.
I'll report back if I make any discovery's. Thanks for the feedback!
I did a good long balance charge last night. Tonight is club racing so I brought my meter to check the cells after each heat.
I also plan to increase the motor temp cut-off to 240F or maybe even disable it in an effort to troubleshoot the glitching.
I'll report back if I make any discovery's. Thanks for the feedback!
Tech Rookie
Joined: Jul 2014
Posts: 4
I wanted to post a follow up and confirm that indeed the cause of my glitching and motor cut-out was caused by an unbalanced cell in my 2S battery.
I performed a good balance charge and confirmed each cell with my volt-meter. I haven't had an issue since.
I think the reason I didn't see any blinking light LVC indicator is that the cell voltage recovered (if only a little) prior to me recovering my truck from the track.
Anyway, wanted to pass on what happened in case anyone else encounters something similar.
So far very pleased with the Viper hardware. Easy to understand and program. Smooth and quiet motor. Got a few compliments in the pits how small and tidy the ESC is from others.
Ryan
I performed a good balance charge and confirmed each cell with my volt-meter. I haven't had an issue since.
I think the reason I didn't see any blinking light LVC indicator is that the cell voltage recovered (if only a little) prior to me recovering my truck from the track.
Anyway, wanted to pass on what happened in case anyone else encounters something similar.
So far very pleased with the Viper hardware. Easy to understand and program. Smooth and quiet motor. Got a few compliments in the pits how small and tidy the ESC is from others.
Ryan
Tech Fanatic
iTrader: (26)
Joined: Jul 2012
Posts: 914
So I recieved my motor from my lhs. He actually ordered me the 6.5 instead of the 7.5. So I am running the 6.5. Was able to test it today. This is a great motor! My other brand was 7.5 but with the gearing I would come off around 140. I went up a tooth on the pinion and it was coming off around 100. Smooth motor. Took me a bit to adjust the radio but dialed it in perfectly. My question is how accurate is the llc on the vtx10r? I normally don't run it as when I practice it's in short spurts. But today I turned it on as I just wanted to run to get used to the motor. I had it set at 6.4 and the red and orange started flashing and car wouldn't move. Still had steering. I checked voltage on battery and they were at 3.9 per. I lowered it to 6.0 and it came off at 3.85 which is fine but wanted a little longer.
So I recieved my motor from my lhs. He actually ordered me the 6.5 instead of the 7.5. So I am running the 6.5. Was able to test it today. This is a great motor! My other brand was 7.5 but with the gearing I would come off around 140. I went up a tooth on the pinion and it was coming off around 100. Smooth motor. Took me a bit to adjust the radio but dialed it in perfectly. My question is how accurate is the llc on the vtx10r? I normally don't run it as when I practice it's in short spurts. But today I turned it on as I just wanted to run to get used to the motor. I had it set at 6.4 and the red and orange started flashing and car wouldn't move. Still had steering. I checked voltage on battery and they were at 3.9 per. I lowered it to 6.0 and it came off at 3.85 which is fine but wanted a little longer.
If you saw error lights on the VPort, its one of the following:
Alternating F and R flashing - error detected from motor (possible motor issue)
Blinking F and R - Motor temp cut off
Blinking F and R with solid N - ESC temp cut off
flashing N (with beep) - can not find neutral signal from radio
Flashing F, N, S - over voltage detected (too much voltage for esc)
Most common mistake we see if that Motor Temp cut off is set too low. This is measured inside the motor, against the rotor. So the temperature is 60*-90* hotter than what you would measure outside on the can. I would check that setting, if you adjusted it at all - that is the most common error we see.
Tech Fanatic
iTrader: (26)
Joined: Jul 2012
Posts: 914
Unlike other speed control companies - our cut off will actually start before the number you selected, to truly protect the system. So at 6.4, it would actually start at 6.6. Now if you had error lights on the esc - that is not a voltage cut off. On a64 software, if you hit voltage cut off, the esc will cut power to the motor, but you still have steering.
If you saw error lights on the VPort, its one of the following:
Alternating F and R flashing - error detected from motor (possible motor issue)
Blinking F and R - Motor temp cut off
Blinking F and R with solid N - ESC temp cut off
flashing N (with beep) - can not find neutral signal from radio
Flashing F, N, S - over voltage detected (too much voltage for esc)
Most common mistake we see if that Motor Temp cut off is set too low. This is measured inside the motor, against the rotor. So the temperature is 60*-90* hotter than what you would measure outside on the can. I would check that setting, if you adjusted it at all - that is the most common error we see.
If you saw error lights on the VPort, its one of the following:
Alternating F and R flashing - error detected from motor (possible motor issue)
Blinking F and R - Motor temp cut off
Blinking F and R with solid N - ESC temp cut off
flashing N (with beep) - can not find neutral signal from radio
Flashing F, N, S - over voltage detected (too much voltage for esc)
Most common mistake we see if that Motor Temp cut off is set too low. This is measured inside the motor, against the rotor. So the temperature is 60*-90* hotter than what you would measure outside on the can. I would check that setting, if you adjusted it at all - that is the most common error we see.



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