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05-29-2012, 08:19 AM | #1 |
Quarry Creeper Join Date: May 2012 Location: Gainesville
Posts: 232
| Novak Goat 2s ESC brushless jolts/jerks under minimal throttle
First electronics post. And I've found nothing on the issue. (Could be my lack of electronics vocabulary, sorry) I've had a small problem that I havent been able to solve since I got the novak goat 2s ESC and 18.5t brushless. Occasionally when I have the throttle in neutral, and give .5% throttle the truck will jerk forward for a millisecond and then stop again. Its hooked to my Lipo battery with a traxxas to tamiya adapter. My on/off switch doesn't exist, so it is hard wired. And I have a castle creations B.E.C. from the battery to my receiver. The jerk only seems to be present when you give minimal throttle (.5%-1%) and back to neutral repeatedly. Any ideas??? I'm no genius when it comes to electronics. I'll post a video if needed. |
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05-29-2012, 08:21 AM | #2 |
RCC Addict Join Date: Feb 2012 Location: paradise
Posts: 1,354
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle
any knicks or breaks in the sensor wire harness?
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05-29-2012, 08:29 AM | #3 |
Quarry Creeper Join Date: May 2012 Location: Gainesville
Posts: 232
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle To my knowledge, the wires look okay. I've looked each one over thoroughly. I've tried routing them different ways, keeping them away from heat and vibration. I'm really at a loss. What kind of issues could cause this? Anything specific I can look for? |
05-29-2012, 08:35 AM | #4 |
Suck it up! Join Date: Mar 2008 Location: Arkansas
Posts: 11,652
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle
Disconnect the sensor wire and see if the drivability changes.
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05-29-2012, 08:37 AM | #5 |
RCC Addict Join Date: Feb 2012 Location: paradise
Posts: 1,354
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle
could just be a glitch. could be that there is a small knick in a wire somewhere that is shorting out. give the whole car a good once over looking for anything like that. also if all of the elecrtonics and wires are bunched together it can cause small glitches like that.
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05-29-2012, 09:24 AM | #6 | |
Quarry Creeper Join Date: May 2012 Location: Gainesville
Posts: 232
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle Quote:
But I'm fairly sure there are no knicks or anything. My wires are all pretty tightly packed. If that is the case, I guess I'm stuck with it. I have everything in the front half of my SCX10 and there is no where else to route everything :/ | |
06-02-2012, 11:45 AM | #7 |
Newbie Join Date: Jun 2012 Location: The dogbowl
Posts: 37
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle
DC motors draw highest amps at start. If your power system isn't up to the task it'll cause cogging issues. I had some serious cogging going brushless on a 6-cell nimh pack. Switching to lipo solved it. Assuming your battery can supply the juice, you might look into eliminating that Tamiya connector. They're not capable of handling the amps of a Traxxas connector. Try going straight Traxxas, and see if that helps. Is the Tamiya on the ESC side or the battery side? |
06-02-2012, 12:13 PM | #8 |
Rock Crawler Join Date: Nov 2009 Location: poteau
Posts: 996
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle |
06-03-2012, 08:22 AM | #9 | |
Quarry Creeper Join Date: May 2012 Location: Gainesville
Posts: 232
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle Quote:
I was thinking the same. Soo lazy though, haha. I hate soldering. The tamiya is on the ESC side. And it looks like the negative side has been arching a little (slightly blackened) | |
06-03-2012, 10:32 AM | #10 |
Suck it up! Join Date: Mar 2008 Location: Arkansas
Posts: 11,652
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle |
06-03-2012, 10:47 AM | #11 |
I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle +1,000,000..... Also, since you have the BEC going to the RX, did you pull the red wire out of the ESC to RX connection & tape it up? If not, do it. Otherwise you are feeding 2 power inputs to the RX which can also create issues. |
06-03-2012, 10:48 AM | #12 |
Newbie Join Date: Jun 2012 Location: The dogbowl
Posts: 37
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle Nice, as long as you disconnect the battery, you won't have to worry about shorting it while you solder. Regardless of whether that's the root cause of your current problem (no pun intended) the tamiya must go. I wouldn't run tamiyas on a fisher price rc.
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06-03-2012, 11:35 AM | #13 | |
I wanna be Dave Join Date: Jul 2009 Location: Rancho Relaxo. California. USA. Earth.
Posts: 3,292
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle Quote:
But seriously, get rid of the tamiya connector. If you're using any type of rc electronics made within the last 5-10yrs, its the weakest link. | |
06-03-2012, 11:49 AM | #14 |
Newbie Join Date: Jun 2012 Location: The dogbowl
Posts: 37
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle |
06-04-2012, 09:55 AM | #15 | |
Quarry Creeper Join Date: May 2012 Location: Gainesville
Posts: 232
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle Quote:
But it confirms my suspicions. I'll get to it asap and let you guys know. | |
06-04-2012, 09:56 AM | #16 |
Quarry Creeper Join Date: May 2012 Location: Gainesville
Posts: 232
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle Even though the Goat has the built in BEC? I've read doubling up can be good for higher power servos? Correct me if I'm wrong anyone.
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06-04-2012, 10:33 AM | #17 | |
Newbie Join Date: Jun 2012 Location: The dogbowl
Posts: 37
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle Quote:
Batteries work in parallel because one will backfeed the other only until the voltages equalize, then you get the same voltage with double the amps. BECs are not batteries and don't behave that way. If you've got both the ESC BEC and the stand-alone BEC hooked up to the receiver, disconnect the red wire on the ESC like suggested. That could be another source of trouble for you. | |
06-05-2012, 01:14 PM | #18 | |
Quarry Creeper Join Date: May 2012 Location: Gainesville
Posts: 232
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle Quote:
The stand alone one looks pretty rough (came on my Goat used) THANKS FOR THE HELP GUYS! | |
06-05-2012, 09:18 PM | #19 |
Quarry Creeper Join Date: May 2012 Location: Gainesville
Posts: 232
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle
Disconnected the Castle BEC today. No jerky glitch. But crappy servo power. There was also a little knick in one of the BEC wires going to the receiver that I couldn't see before. So I found the source! Thanks for the pointers guys! I'll get a new Castle BEC and see what happens! Stay tuned? Here is the truck in it's current state if anyone was interested |
06-05-2012, 10:12 PM | #20 |
I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
| Re: Novak Goat 2s ESC brushless jolts/jerks under minimal throttle
Just use electrical tape to cover bare spots in the wires.....no need to replace it. |
Tags |
brushless, electronics, issue, novak goat esc, problem |
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