Glitch????

[bolognarc]

I have been having a problem with my electric xxxt that I can't seem to solve. I have a glitch in the same spot at my local track everytime I let up on the throttle (to set up for the corner) I have replaced everything (servo,esc,motor,radio All w/new equipment) I have rerouted the antenna wire to make sure it isnt touching anything (slit tube & ran thru tube instead of thru chassis) I'm at witts end trying to solve this issue. I hit the wall so hard when setting up for the corner this past weekend that I broke the chassis in half. I originally had JR 590 servo,jr xs3 synthesized receiver & radio w/lrp 7.1 esc. I have switched to Futaba pcm radio & receiver & Novak gt-7 esc. Any help would be highly appreciated as this has occured 3 weeks in a row & I was ready to E-Bay everything Saturday night...... this is a Graphite truck MF1

[ImGoinRCn]

Tim, have you tried cutting out a piece of lexan the size of your reciever and double side tape it to the reciever and then those two to the chassis so then you would have that lexan between the reciever and the chassis? Just something I thought of that we did back in the old day when we had radio problems.

[bolognarc]

well I did try mounting it with the thick adhesive much like camper shell tape it's 1/8 thick. This is something that has just started and the more speed I carry (lower turn) the worse the glitch. I can try that after I get a new chassis but right now I'm looking for something I may have overlooked. If you apply the same theory to a graphite pan car I've never had that issue with the same equipment mounted,same way on a larger track.

[JoeDirt]

i had the same thing happen to me at coopers. would get a hit(glitch) coming out of turn 2 just about every lap, same spot. tryed everything, making lexan sheilds, re routed the wires and antennae......same thing. finally one of the locals showed me a little gadget that JR makes.....its a round peice of plastic that hinges open....there is 2 magnets on each half, you fold your servo or speed control lead over its self 3 times, stick it in the plastic housing and snap it shut. i put them on my car and havent had a glitch or any radio interference since. i will look and see if i still have the package with the part number and will post later if i do. oh, these things are 12.95 for 2 of them

[JoeDirt]

heres the link to them on jr web page...
http://www.jrradios.com/Products/Default.aspx?ProdID=JRPA028

[bolognarc]

I will give it a try...the one thing & this is what puzzles me the lower the wind the bigger the glitch.

[DrOlds]

It might have something to do with the caps on the motors or need a new or extra schottky diode.Make sure the motor and battery wires are twisted(not running parallel).An out of round comm can cause it too-you might try another comm lathe and see if it makes any difference.

[bolognarc]

The wires are running parrallel but I can change that easy enough...The motors are all true comms & I replaced the diodes already. The worse glitch I have is on a brand new (did it new & after trued/diamond bit) revolution based motor 9 turn single. I have used some 8x2 Reedys that are equally as bad.

[ImGoinRCn]

heres the link to them on jr web page...
http://www.jrradios.com/Products/Default.aspx?ProdID=JRPA028

Tim, is this what we was talking about in our emails? The thing on the japanese sedan racers cars like Masami and Hara's???

It says Hobbytown is the closest but I'm sure Michael can get them.

[bolognarc]

Ive rubbed my wires with a dirty wash rag..oh thats for wart removal...lol what can i say I'm desperate!

[Night Flight]

I had the same thing happen to a nitro sprint car. Changed everything just like you did even went as far as to send all servos.receivers,and transmitter to futaba to be checked out. One of the guys that has been running R/C for a lot of years kept telling me to look for metal to metal contact. Could not find the problem any where. To make a long story short he was right. Under a metal brace for the steering blocks the brace had wore a small hole in the hump pack. It would only touch when I was going into turn 1 at our track the rest of the time it was fine. Could not see the hole until the brace was broken during one of my glitch crashes. I then proceeded to cut the brace out and the glitch went away. So I guess what I am saying is keep looking. Look at things that were still in the car during all the changes that you made. Did you try the on-off switch. How are the shields on your batteries or packs are any of them wore through. It could be out of site between the batteries and only making contact when the chassis flex's. Good luck I hope you find something that you may have over looked.

[bolognarc]

I have triple lined the chassis so the batteries won't make contact (my first thought) all wires are intact (no cuts nicks etc) I did reroute the motor wires so they aren't parellell any longer.It will be a few weeks before I am able to test it but will keep you posted on the solution or stomp the truck (gratification) lol

[Night Flight]

Did you ever figure out what the glitch was.

[Jim Ruff]

Hi, here are a few things to try. You gave some clues in you responces. First, the graphite in the xxxt is in composit form not layered like a pan car. Also you sad it get worse with hotter motors. Now, with the low turn motor you may need a large capaciter on the speedo because low turn motor draw so much pawer a various throttle points. Also I have seen two layers of servo tape help with glitches. Hope this may help

[ImGoinRCn]

Does it make a lot of difference in a composite chassis like the Losi and a layered graphite chassis in a Kransel?

[Speedmunkey]

Tim, it sounds like you are finding the same glitch I had there. Mine was the turn coming off the back straight, I guess you'd call that one 3.. If I was on throttle, it went to crap. If I coasted, it did fine. I was running a brushless though, so it wouldn't be an arcing or cap issue. I too was running an MF1. Dustin had the same glitch and he was running my other MF1. I'm thinking it's something in the wiring down there near that corner.

[bolognarc]

I havent had the oppourtunity to test it yet. I bought a used chassis & some new frt end pieces along with changing the mtg of the receiver but will keep you posted as to the outcome. I felt like the majority of the issue was the receiver mtg issue but will have to wait & see.

[mach51]

you may want to check the solder job on your batteries. Alot of offroad nitro guys have had the spektrum system show them that their hump packs were not as solidly built as believed. They worked fine with crystals but the spektrum caused them to glitch. I know yours isnt Spektrum related but I thought 1) Batteries 2) Capacitors 3) the Losi Chassis...good luck.

[latemodel13]

I think your on the right track. I had the same problem. I moved the receiver and also where the antenna came out of the car. I hope it helps.