RCCrawler Forums

ILoveRCRockCrawlin · 01-06-2007, 06:52 PM

On my mini-t I have the mamba 25 esc with a duratrax 3ch radio. I'm having a problem with the trim. When its sitting on the floor it, and without me touching nothing on the radio, it wants to go into reverse. I have the throttle trim turned all the way to the direction that would want to make it go forward. So basically, it needs to be able to turn more but can't. How do I fix this?

Kamikaze · 01-06-2007, 07:19 PM

Adjust the trim to zero and reprogram the esc.

ILoveRCRockCrawlin · 01-06-2007, 07:23 PM

Just tried that. No different. But I also disconnected the motor while was doing it, was I supposed to?

Kamikaze · 01-06-2007, 07:26 PM

I don't think that would matter, sounds weird, try reprograming it with the trim the other way around then adjusting it, but I don't see why that would help either.

ILoveRCRockCrawlin · 01-06-2007, 07:29 PM

Quote:

Originally Posted by Kamikaze

I don't think that would matter, sounds weird, try reprograming it with the trim the other way around then adjusting it, but I don't see why that would help either.

Doesn't matter where the trim is. Still doing it. Gah!! I hate electronics that are smarter than I am!

ILoveRCRockCrawlin · 01-13-2007, 05:08 PM

I still need help. Anyone have any suggestions?

wrx-n-ktm · 01-13-2007, 06:10 PM

I am currently having the same problem with a TR2

ILoveRCRockCrawlin · 01-13-2007, 07:25 PM

Quote:

Originally Posted by wrx-n-ktm

I am currently having the same problem with a TR2

Yeah. Its rather annoying.

Chris_The_Battery_Man · 01-13-2007, 07:33 PM

If the transmitter has a 70/30 and 50/50 for the throttle then try it on 70/30. I had to do that on my rustler with a mamba max. Then revearse the red and black wires to the motor. If it goes faster in reverse than forward.... then swap em again and reverse the throttle channel on the transmitter.

ILoveRCRockCrawlin · 01-13-2007, 07:39 PM

Quote:

Originally Posted by Chris_The_Battery_Man

If the transmitter has a 70/30 and 50/50 for the throttle then try it on 70/30. I had to do that on my rustler with a mamba max. Then revearse the red and black wires to the motor. If it goes faster in reverse than forward.... then swap em again and reverse the throttle channel on the transmitter.

So it is safe to reverse the wires to the motor like that? And mine doesn't have the 70/30 and 50/50 setting.

Chris_The_Battery_Man · 01-13-2007, 08:58 PM

Quote:

Originally Posted by ILoveRCRockCrawlin

So it is safe to reverse the wires to the motor like that? And mine doesn't have the 70/30 and 50/50 setting.

Then hold the car off the ground. Give it full forward and full reverse. If the reverse is faster, then you simply have the throttle channel revresed and the motor wires are backwards. But then again, the wires should be all color coated and pretty fool proof. Usually the revers is 50
5 throttle. Ifyou have bad luck still..... Just buy the castle link. That made a huge difference for me. But in the manual programming there is a bunch of crap about applying full reverse and full forward so the ESC will recognize it... Read through that and that might help you.

ILoveRCRockCrawlin · 01-13-2007, 09:10 PM

Quote:

Originally Posted by Chris_The_Battery_Man

Then hold the car off the ground. Give it full forward and full reverse. If the reverse is faster, then you simply have the throttle channel revresed and the motor wires are backwards. But then again, the wires should be all color coated and pretty fool proof. Usually the revers is 50
5 throttle. Ifyou have bad luck still..... Just buy the castle link. That made a huge difference for me. But in the manual programming there is a bunch of crap about applying full reverse and full forward so the ESC will recognize it... Read through that and that might help you.

On my radio I have it set so the throttle is reversed and the wire on the motor are connected right. Hmmmm? I guess I'll try reversing the motor wires and put the throttle back to normal and see what that does. But that can wait till the morning. I blew out a CVD, so its not going anywhere for some time.

Thanks for the help, too. I appreciate it!

JohnRobHolmes · 01-14-2007, 08:18 PM

Sounds like it is calibrated wrong. Green light on the ESC is forward, red light is reverse BTW.

But, it sounds like your radio has a really bad drift. Basically your neutral throttle isnt staying in the same place. Even high end radios can have this, but cheap radios are plagued by it. No matter how many times you reprogram your throttle endpoints your radio will still drift and cause the problem.

SIRMAXXALOT · 01-15-2007, 01:53 AM

From my experiance in racing electrics it will run with the wires reversed but I would suggest if the wires are color coded and the motor is labeled +/- I would stick to it, it can be hard on the motor and the timing will be off, I have not worked on a "mini" anything to much so I could be talking out of my butt but I know running a motor in reverse is not healthy but it will not be the end of it by any means just a little harder on it I think dur to the timing.
My suggestion I guess is to switch the reversing switch again to normal and the reset the esc again.

I had a buddy that was racing with me and every time he turned the car on he had to reverse the switch so every other time it was normal and the other times it was reversed WITHOUT setting the esc, that was a mind bender..lol

slobin3d · 01-15-2007, 01:57 AM

the nice thing about nonsensored brushless motors is that they dont care what order the wires are in, if the motor is spinning the wrong way reverse any two wires and it will be fine. If you read the small print in the manual its there too. Just so you dont think i'm giving bad advise

01-06-2007, 06:52 PM	#1
ILoveRCRockCrawlin RCC Addict Join Date: Dec 2004 Location: Central NY Posts: 1,980	Help! On my mini-t I have the mamba 25 esc with a duratrax 3ch radio. I'm having a problem with the trim. When its sitting on the floor it, and without me touching nothing on the radio, it wants to go into reverse. I have the throttle trim turned all the way to the direction that would want to make it go forward. So basically, it needs to be able to turn more but can't. How do I fix this?

01-06-2007, 07:19 PM	#2
Kamikaze I wanna be Dave Join Date: Oct 2005 Location: Columbia TN Posts: 6,154	Adjust the trim to zero and reprogram the esc.

01-06-2007, 07:23 PM	#3
ILoveRCRockCrawlin RCC Addict Join Date: Dec 2004 Location: Central NY Posts: 1,980	Just tried that. No different. But I also disconnected the motor while was doing it, was I supposed to?

01-06-2007, 07:26 PM	#4
Kamikaze I wanna be Dave Join Date: Oct 2005 Location: Columbia TN Posts: 6,154	I don't think that would matter, sounds weird, try reprograming it with the trim the other way around then adjusting it, but I don't see why that would help either.

01-13-2007, 05:08 PM	#6
ILoveRCRockCrawlin RCC Addict Join Date: Dec 2004 Location: Central NY Posts: 1,980	I still need help. Anyone have any suggestions?

01-13-2007, 06:10 PM	#7
wrx-n-ktm Rock Crawler Join Date: Feb 2005 Location: stafford springs Posts: 697	I am currently having the same problem with a TR2

01-13-2007, 07:33 PM	#9
Chris_The_Battery_Man I wanna be Dave Join Date: Oct 2006 Location: Milwaukie OR Posts: 2,078	If the transmitter has a 70/30 and 50/50 for the throttle then try it on 70/30. I had to do that on my rustler with a mamba max. Then revearse the red and black wires to the motor. If it goes faster in reverse than forward.... then swap em again and reverse the throttle channel on the transmitter.

01-14-2007, 08:18 PM	#13
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	Sounds like it is calibrated wrong. Green light on the ESC is forward, red light is reverse BTW. But, it sounds like your radio has a really bad drift. Basically your neutral throttle isnt staying in the same place. Even high end radios can have this, but cheap radios are plagued by it. No matter how many times you reprogram your throttle endpoints your radio will still drift and cause the problem.

01-15-2007, 01:53 AM	#14
SIRMAXXALOT Pebble Pounder Join Date: Jan 2007 Location: Superior Posts: 121	From my experiance in racing electrics it will run with the wires reversed but I would suggest if the wires are color coded and the motor is labeled +/- I would stick to it, it can be hard on the motor and the timing will be off, I have not worked on a "mini" anything to much so I could be talking out of my butt but I know running a motor in reverse is not healthy but it will not be the end of it by any means just a little harder on it I think dur to the timing. My suggestion I guess is to switch the reversing switch again to normal and the reset the esc again. I had a buddy that was racing with me and every time he turned the car on he had to reverse the switch so every other time it was normal and the other times it was reversed WITHOUT setting the esc, that was a mind bender..lol

01-15-2007, 01:57 AM	#15
slobin3d I'm a stupid C U N T! Join Date: Jun 2005 Location: In the Garage! Posts: 4,307	the nice thing about nonsensored brushless motors is that they dont care what order the wires are in, if the motor is spinning the wrong way reverse any two wires and it will be fine. If you read the small print in the manual its there too. Just so you dont think i'm giving bad advise

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