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# SES-V2 Horns

Last modified by Eric Nantel on 2024/07/03 10:04
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Both a driving horn and an idler horn assembly are supplied with the servos. The idler horn is not connected to the driving horn / output spline and is meant to add support to brackets.

## Driving Horn
| The aluminum driving horn is connected to the output shaft of the final gear in the gear train which is located within the servo. This output shaft has a specific cross section called a “spline” (specifically the “male” version of the spline), and the driving horn has the mating “female” spline. The details of the spline are found below. The driving horn is held in place using an M3 x 8mm pan head machine screw and has the SES standard mounting pattern described below.

## Idler Horn
| The idler horn is not connected to the output spline and is therefore not driven. It is intended to act as a solid free-spinning connection point and can be installed in one of three locations on the servo. Installing the idler horn on the underside of the servo (as shown in the image), in line with the driving output shaft allows a Lynxmotion C-bracket to be used. The idler horn sub-assembly consists of a custom spacer, a 3mm ID x 8mm OD flanged ball bearing (Lynxmotion standard) and the idler horn itself. The idler horn is held in place using an M3 x 10mm pan head machine screw. Documentation in this wiki referring to the "idler horn" normally refers to the idler horn assembly.

Tags: LSS horn
Created by Eric Nantel on 2024/07/03 10:04
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