servo horn problem
#1
servo horn problem
I have a Savox 1258tg and a Reedy rt1508 servo. I use the Factory Team 25t aluminum servo horn for both srvos.
After coming off the track, I noticed the slop on the steering rack that was coming from my servo horn being loose and wobbling on the servo teeth. The servo screw is completely tightened before i go onto the track, but it keeps happening. Do I need to use the servo horn ring or washer, or what is the problem?
After coming off the track, I noticed the slop on the steering rack that was coming from my servo horn being loose and wobbling on the servo teeth. The servo screw is completely tightened before i go onto the track, but it keeps happening. Do I need to use the servo horn ring or washer, or what is the problem?
#2
Tech Champion
iTrader: (102)
If youare using the clamping style, some times if its over tightened against the servo output spline, the aluminum steering arms can deform a little. This may be the case, but thats not 100% certain. you can always check, by removing the clamping screw, if it relaxes to the point that the gap is almost parallel on both sides, it probably has not been overtightened, if it does not relax much, then it has.
If its a regular bolt on one, it could be that the tolerances are off, or maybe a loose fit. I have that issue when i ran XP servos with Mugen arms, they seemed always loose. I went to Kyosho composites instead. Now I run Protek Clamping arms, and always keep 2 spares.
If its a regular bolt on one, it could be that the tolerances are off, or maybe a loose fit. I have that issue when i ran XP servos with Mugen arms, they seemed always loose. I went to Kyosho composites instead. Now I run Protek Clamping arms, and always keep 2 spares.
Last edited by 1/8 IC Fan; 02-28-2017 at 08:08 PM.
#3
Tech Adept
#4
If youare using the clamping style, some times if its over tightened against the servo output spline, the aluminum steering arms can deform a little. This may be the case, but thats not 100% certain. you can always check, by removing the clamping screw, if it relaxes to the point that the gap is almost parallel on both sides, it probably has not been overtightened, if it does not relax much, then it has.
If its a regular bolt on one, it could be that the tolerances are off, or maybe a loose fit. I have that issue when i ran XP servos with Mugen arms, they seemed always loose. I went to Kyosho composites instead. Now I run Protek Clamping arms, and always keep 2 spares.
If its a regular bolt on one, it could be that the tolerances are off, or maybe a loose fit. I have that issue when i ran XP servos with Mugen arms, they seemed always loose. I went to Kyosho composites instead. Now I run Protek Clamping arms, and always keep 2 spares.
The servo screw is tight and then comes loose on the track. I will try some thread lock.
What size should a servo screw be? Maybe I need a slight bit longer screw, or will the thread lock fix it from coming loose?
Thanks!
#5
Tech Adept
The thread-lock ought to do the trick. I would think a 6-8mm M3 screw would be about the correct size.
#6
Always use thread lock on any metal to metal parts
#7
Tech Master
iTrader: (204)
I am not that crazy about using lock-tite on a servo screw, just had a issue with a stripped screw and had to Dremel to get it loose, not very happy, so I went to the local hardware store and in their washer bins, I found what they called star washers, they have locking parts on both inside and outside with a 3mm inside hole, for me they work perfectly and yet to have them come loose, I also use them on my clutch bells when I have enough room for them.
#8
Tech Adept
You really shouldn't have that issue when using regular blue removable thread-lock on this size of screw, especially if using a socket head M3.
#10
I put blue Loctite on all my servo screws. Just don't use red on anything for RCs.
#11
Tech Champion
iTrader: (280)
I am not that crazy about using lock-tite on a servo screw, just had a issue with a stripped screw and had to Dremel to get it loose, not very happy, so I went to the local hardware store and in their washer bins, I found what they called star washers, they have locking parts on both inside and outside with a 3mm inside hole, for me they work perfectly and yet to have them come loose, I also use them on my clutch bells when I have enough room for them.
#13
Tech Adept
Most servos use button head screws? You can just replace a button head screw with a socket head screw.
#15
Tech Adept
I agree that screw length is also important. That's why I recommended 6-8mm as a starting point.