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Old 03-05-2007, 07:16 PM   #2296
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I suppose there are different theories, but I believe that digital servos are more likely to fry than analogs when subjected to conditions like incorrect EPA's or added stress.

Dale - Probably not? But it might be one spacer behind, and two in front, versus "all the way back" being that the spacers are all in the front.
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Old 03-05-2007, 10:02 PM   #2297
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Talking servo question

I have the losi 8ight buggy and I had a nother throttle servo go out on me, it is my 5th one. This is what I did so far to see if I could fix the problems, I cut the ball cup, put kingheadz radio tray stiffiner on, alluminum chassis braces, set the epa correct for sure, I had somebody that has been racing for 14 years help so he knew what he was doing, He also run's the 8ight buggy. Ok I have been running cheap servos like z590- z270's just so if they blow I would not be out a lot of money. So my question is do you think those servos I am using are to weak for my throttle and it is just putting to much stress on the servo. So what I am thinking maybe I should put like a high torque servo in there like the airtronics blue or the jr9000t. So my questions is what do you think I should do becasue I am sick of burning up servos, and sick of worring about the throttle servo going out when ever I go out to race. So if you could help me out I would really appriciate it alot. Thank you very much.
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Old 03-05-2007, 10:10 PM   #2298
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Originally Posted by losi8ight
Ok I have been running cheap servos like z590- z270's.
There's your problem. The price of those servos is appealing, but they are not really meant to with-stand the vibration/impact that these buggies endure.

I have been using a JR 8800s for throttle and haven't had it go out yet. I've got about 4 gallons on my 8ight.
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Old 03-05-2007, 10:15 PM   #2299
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I don't think that the servo failures are caused by flex, not one bit. The radio tray stiffener, the chassis braces, none of that is going to help.

Make sure your servo is spaced up of the chassis considerably (the stock spacers are probably not enough).

Use a 1/2 inch screw as the one that will thread into the bottom of the battery box. Put two of the 1/10th scale size shock o-rings on the screw, in between the chassis and battery box. Only thread the screw in as far as the screw will be flush with the boss inside the battery box. This will help cushion the radio tray from vibration.

This is what I've been doing to my cars since my first, and only, throttle servo failure. I've driven gallons since.
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Old 03-05-2007, 10:50 PM   #2300
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Yup, the spacers help alot, and I've had my Z590 for several months now, no failures. You don't need an expensive servo to solve the problem.
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Old 03-05-2007, 10:55 PM   #2301
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Quote:
Originally Posted by losi8ight
I have the losi 8ight buggy and I had a nother throttle servo go out on me, it is my 5th one. This is what I did so far to see if I could fix the problems, I cut the ball cup, put kingheadz radio tray stiffiner on, alluminum chassis braces, set the epa correct for sure, I had somebody that has been racing for 14 years help so he knew what he was doing, He also run's the 8ight buggy. Ok I have been running cheap servos like z590- z270's just so if they blow I would not be out a lot of money. So my question is do you think those servos I am using are to weak for my throttle and it is just putting to much stress on the servo. So what I am thinking maybe I should put like a high torque servo in there like the airtronics blue or the jr9000t. So my questions is what do you think I should do becasue I am sick of burning up servos, and sick of worring about the throttle servo going out when ever I go out to race. So if you could help me out I would really appriciate it alot. Thank you very much.
Well when the LST and Mayhem came out a few years ago, people were blowing those same servos. Horizon Hobby said that they had a bad batch go out and have since fixed them. Makes you wonder if they are just a cheap Servo? Still...
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Old 03-05-2007, 11:10 PM   #2302
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R40 - I think that spacing the servo properly off of the radio tray is the most important part of keeping the servos alive. Glad to hear it's working well for you.

MonkeyWrench - I can't imagine trying to engineer a servo to handle the duty of what we ask them to do in an R/C car, especially an 1/8th scale buggy!
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Old 03-05-2007, 11:50 PM   #2303
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I just found out tonight that it sounds like Losi is planning on changing the outer rear hinge pins that seem to have been a problem.
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Old 03-06-2007, 12:50 AM   #2304
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To what end are they changing the design?
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Old 03-06-2007, 01:34 AM   #2305
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I don't know, I'm not sure if they've decided on a course of action yet. But I understand that they're exploring a change to help improve durability.
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Old 03-06-2007, 04:55 AM   #2306
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Aaron, just to clarify something regarding the 1/10th o-rings in the battery box. Are you referring to step F-08 in the manual? If so, all four screws need to o-ringed or just the two closest to the throttle servo?
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Old 03-06-2007, 06:49 AM   #2307
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Default Throttle Servo "OUT"

My 1st big race...Pro Series @ Badlands....I made the A-Main in Inter. 1/8 buggy ....I was in 3rd half way through 30 minute main....I was running really strong and consistant...when suddenly the Throttle servo stoped working..I'm done with Hi-tec servos...but I have other guys that have had the airtronics and futaba servos go out to....I know the EPA and the ball cap etc...are right... I had to share this with you guys....
And the guys @ Badlands III really put on a great show....The track is awsome ....if you can make the Trip to that track its worth it!

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Old 03-06-2007, 07:42 AM   #2308
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So do you guys mean like put shock o-rings under the radio tray? Does anybody have a picture we can refer to if so that would be great.
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Old 03-06-2007, 08:10 AM   #2309
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Quote:
Originally Posted by Aaron Waldron
I just found out tonight that it sounds like Losi is planning on changing the outer rear hinge pins that seem to have been a problem.
Thanks again Aaron
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Old 03-06-2007, 08:54 AM   #2310
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Quote:
So do you guys mean like put shock o-rings under the radio tray? Does anybody have a picture we can refer to if so that would be great.


I am not sure what has been said about the O-rings on this board however I spoke with the Drake last Saturday and he told me to put 4 O-rings 1 under each screw that attach the throttle servo to the radio tray there by isolating the servo from some of the chassis flex so far I have not had another failure since doing this. Good luck

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