Hi,
I know micro servos are not compatible with the servo erector set.
I’m still wondering if the Hitec Spline Metal Servo Horn could be fit on a micro servo such as the HS-81MG.
I would also like to know if the E-Z Aluminum Servo Bracket Two Pack could be used to fix a micro servo. I’m planning to cut one side of the bracket between the two holes (since the micro servo only has 1 hole). Would that work?
Thanks,
Vincent
While I didn’t try it explicitly with one of those horns (didn’t have any handy), I did just try an aluminum horn that comes standard with 5645 servos on the HS-81 output shaft, and it seemed to lock positively, at least up to the amount of torque that I would feel comfortable with applying to that servo’s output (not a whole bunch). Since a standard horn fits well, I would assume that the other type would as well.
Be aware, though, that the HS-81 is a micro servo, and as such is not nearly as robust as a larger servo. For the kinds of forces involved with an HS-81, a nylon horn is probably more than adequate, and an aluminum one is just overkill.
For the most part, holes are holes. You might possibly run into issues of spacing, where the mounting holes on the HS-81 might be too close to the servo’s body to allow clearance for the bracket, but without a spare bracket (and not wanting to further disassemble the arm), I can’t verify this for certain. Someone else will have to give you an absolute go/no-go on it. Even if there are clearance issues, I imagine that a bit of careful work with a file would allow you to get the bracket tight enough to make it work.
You are right, I do not intend to apply strong torque to the servo (it will be used to lift a ball less than 25g, pushing with a 3" tube). I was considering the metal horn just because that’s the only thing I could find on lynxmotion.com. I couldn’t see nylon horns being sold…
Thanks for your help, it’d be great if somebody could confirm that part…
The servos come with an assortment of plastic output horns.
Oh, so it’s the case that the micro servo comes with a horn big enough to screw it to Aluminum Interconnect / Servo Horn Bracket Two Pack for example?
It’s been a while since I have had a new HS-81 to play with, but the output horns that it comes with are smaller than the standard-sized output horns. I seem to recall that it comes with at least a round horn with hole spacing close to, if not equal to, the inner hole spacing on a standard Hitec servo’s round output horn. This makes it too small to work with the standard SES hole spacing, which is designed to work with the output horns that come with standard-sized servos.
It may come with other, larger horns too, but I can’t remember. Someone else, who has them available to compare hole spacings on the horn(s) and a standard SES bracket, is going to have to answer that for you.
Yes the aluminum servo horns will fit the HS-81 servo spline.
I have never tried using the ez servo bracket to attach a micro servo. But I can see no reason why it will not work.
