Steering servo geometry

[vance]

Hi There!
New to the forum & first post here.
There seems to be some weird geometry coming from the long arm of the steering servo to the servo saver.
I replaced the steering servo that came with mine with an HPI servo that came with a metal arm. The servo arm only has two holes in it for the ball & the holes are so far from the center of the servo that I have to turn the ATV down to about 55% left & right in order to keep the travel to a reasonable amount of steering.
This also puts the steering linkage rod at an extreme angle & not anything close to straight, which would be optimal.
I guess I will try & find another servo arm to get it closer to the center so I can get the ATV's back up around 100% where they should be.
I may have to drill & tap the HPI servo arm about half way down the arm to get the proper set up, but I would prefer not to & just order a new arm.
Does anyone else have this issue?
Thanks
Vince D

 

[Lan-Ed-Tul]

well when i upgraded my T1000 steering servo i got the PA bracket mount, and used a hitech servo with ametal arm. my enpoints had to be adjusted on radio for that servo as well, but in all the servo arm matched and servo positioning matched the original setup pretty darn close, thats the thing to look at when swappin out stuff, is get it as close as ya can if not dead on the way it was, and the new servo you used may have a wider sweep than the stocker, and if using a new radio over stocker too, settings may be different to start with, just cuz ya had to turn down the travel and endpoints don't mean anything, mines set like 75% mainly cuz it matched the full throws both ways, and not over extending anything either way for abreaking scenario,plus its a cushion so to speak for the servo endpoints, if ya get my meaning. i think maybe ya just need to look at the way the old setup was, and get the new one as close as ya can then just adjust the endpoints sweep speeds accordingly, and it don't matter if its 55% or 75% if its setup right it don't matter

 

[vance]

Thank you for replying- I'm new to this car stuff. Because the angle of the rod going from the servo arm to the servo saver is so extreme, i will probably re-drill the hole for the ball in the servo arm about half the distance it is now. That will sacrifice some speed for power & since I'm a recreational driver of these things I'm sure i won't notice a thing.
I come from from "old school" RC helicopter flying & we were constantly drilled about having equal endpoints & having them as close to 100% as we could get them because of the non-linear response of the arc of the output of the rotary servo compared to the linear movement of the linkage rods. I know- boring as all get out, but I'm letting you know why i seemed so concerned about it.
Thank you for replying & i will put your information to good use.
Vince D

 

[Lan-Ed-Tul]

Thank you for replying- I'm new to this car stuff. Because the angle of the rod going from the servo arm to the servo saver is so extreme, i will probably re-drill the hole for the ball in the servo arm about half the distance it is now. That will sacrifice some speed for power & since I'm a recreational driver of these things I'm sure i won't notice a thing.
I come from from "old school" RC helicopter flying & we were constantly drilled about having equal endpoints & having them as close to 100% as we could get them because of the non-linear response of the arc of the output of the rotary servo compared to the linear movement of the linkage rods. I know- boring as all get out, but I'm letting you know why i seemed so concerned about it.
Thank you for replying & i will put your information to good use.
Vince D

well with the new tech thats out there like digitasl servo and radios, its still a factor, just not quite as drastic as back in the older types of radio gear. digital stuff nowadys like my 4pks radio is so advanced over the older stuff,