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06-09-2011, 10:40 AM | #1 |
Rock Crawler Join Date: Jul 2009 Location: Little Rock, Arkansas
Posts: 542
| Servo sometimes veers to the left when under full constant throttle
I have noticed something odd with my rig. When I get to a relatively flat area on a trail that has some small pebbles, bumps, etc., and I am driving at full throttle (it has a 45T motor so it isn't faster than a walking pace) it sometimes seems as though the servo starts steering left and stays there(despite my input with the steering wheel on the controller) until I completely let off the throttle. After I let off the throttle, it's back to normal. I can get this weirdness to occur fairly often if I try to make it happen. I don't know what is causing it. Any ideas as to what it could be? UPDATE: I took an up-close video of my truck doing this so you all can witness it and maybe know what to do. In this video the truck does it on the 3rd, 4th, and 5th burst of throttle. During the entire video I am not touching the steering on the controller at all. Last edited by BadRockNoCookie; 05-31-2012 at 12:02 PM. Reason: update |
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06-09-2011, 10:55 AM | #2 |
Got Worms? Join Date: Jun 2009 Location: Golden, CO
Posts: 6,116
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No idea, try a different radio, don't touch the rx and connections though. Just bind a different radio to it and see if it still happens
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05-31-2012, 12:00 PM | #3 |
Rock Crawler Join Date: Jul 2009 Location: Little Rock, Arkansas
Posts: 542
| Re: Servo sometimes veers to the left when under full constant throttle
I updated this with a video that shows the problem in action.
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05-31-2012, 07:15 PM | #4 |
Got Worms? Join Date: Jun 2009 Location: Golden, CO
Posts: 6,116
| Re: Servo sometimes veers to the left when under full constant throttle
Do you have a bec?
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05-31-2012, 07:42 PM | #5 |
I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
| Re: Servo sometimes veers to the left when under full constant throttle |
05-31-2012, 09:15 PM | #6 |
Got Worms? Join Date: Jun 2009 Location: Golden, CO
Posts: 6,116
| Re: Servo sometimes veers to the left when under full constant throttle
I see it now on my computer...the blue blends on my phone What servo is it? |
06-01-2012, 11:28 AM | #7 | |
Rock Crawler Join Date: Jul 2009 Location: Little Rock, Arkansas
Posts: 542
| Re: Servo sometimes veers to the left when under full constant throttle Quote:
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06-01-2012, 04:33 PM | #8 |
Got Worms? Join Date: Jun 2009 Location: Golden, CO
Posts: 6,116
| Re: Servo sometimes veers to the left when under full constant throttle
what happens when your going backwards?
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06-01-2012, 07:34 PM | #9 |
I wanna be Dave Join Date: Aug 2004 Location: central VT
Posts: 2,300
| Re: Servo sometimes veers to the left when under full constant throttle
I had the same problem in my Wraith. Changed every single component except the ESC without fixing it. Finally swapped out the Novak Havoc 3s controller for a MM Pro and solved it. I cannot explain why. Your not running a Novak ESC by chance are you? Mine wouldn't do it in reverse, only forward. I too was using a Castle BEC. |
06-02-2012, 10:21 AM | #10 |
Newbie Join Date: Feb 2012 Location: Eatonville
Posts: 46
| Re: Servo sometimes veers to the left when under full constant throttle
Had the same problem, look at steering glitch thread in electronics. It was a ground issue for me.
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06-04-2012, 09:47 AM | #11 |
Rock Crawler Join Date: Jul 2009 Location: Little Rock, Arkansas
Posts: 542
| Re: Servo sometimes veers to the left when under full constant throttle |
06-04-2012, 09:48 AM | #12 | |
Rock Crawler Join Date: Jul 2009 Location: Little Rock, Arkansas
Posts: 542
| Re: Servo sometimes veers to the left when under full constant throttle Quote:
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06-04-2012, 09:57 AM | #13 |
Rock Crawler Join Date: Jul 2009 Location: Little Rock, Arkansas
Posts: 542
| Re: Servo sometimes veers to the left when under full constant throttle |
06-04-2012, 10:02 AM | #14 |
I wanna be Dave Join Date: Mar 2007 Location: roland,ar
Posts: 5,981
| Re: Servo sometimes veers to the left when under full constant throttle
are any of your motor/servo wires overlapping?
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06-05-2012, 02:53 PM | #15 |
Rock Crawler Join Date: Jul 2009 Location: Little Rock, Arkansas
Posts: 542
| Re: Servo sometimes veers to the left when under full constant throttle On one side of the frame, the positive and negative wires from the output of the BEC run underneath the motor wires that are coming from the ESC and going to the motor. They are in a clip together. On a side note, last night I was able to get the truck to stop doing the glitch by increasing the reverse throttle trim to 100%(I normal keep the reverse trim at 76%), running it for about 3 minutes, then bringing it back down to 76%. Don't know why that helped, but it seemed to. Seems like if it was having a wiring problem that the glitch would still be happening. Also, after checking my wiring last night, I remembered that the BEC is already grounded to the RX because when I first put the truck together and wired the BEC straight to the servo, the servo freaked out constantly. So I hooked the BEC up to the RX so that the BEC is giving power to the RX and the servo and the servo stopped freaking out. The only thing the ESC is powering is itself and the motor. |
06-05-2012, 06:50 PM | #16 | |
I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
| Re: Servo sometimes veers to the left when under full constant throttle Quote:
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06-06-2012, 08:02 AM | #17 |
Rock Crawler Join Date: Jul 2009 Location: Little Rock, Arkansas
Posts: 542
| Re: Servo sometimes veers to the left when under full constant throttle I cut the ESC's red wire so that only the signal wire and the ground are going to the RX. I then folded the red wire over and heatshrunk it .
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06-06-2012, 09:46 AM | #18 |
I wanna be Dave Join Date: May 2007 Location: Vancouver, BC
Posts: 2,376
| Re: Servo sometimes veers to the left when under full constant throttle
That's a tough one! Are you running an AM radio system by chance? |
06-06-2012, 03:21 PM | #19 |
Rock Crawler Join Date: Jul 2009 Location: Little Rock, Arkansas
Posts: 542
| Re: Servo sometimes veers to the left when under full constant throttle |
06-06-2012, 03:24 PM | #20 | |
I wanna be Dave Join Date: May 2007 Location: Vancouver, BC
Posts: 2,376
| Re: Servo sometimes veers to the left when under full constant throttle Quote:
So much for the AM noise theory, but it might be good to make sure all your connections are good. Do you have another servo you might be able to try in place of your steering servo? Maybe it has an intermittent connection inside and is causing it to glitch. | |
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