Assembly Of The Wave Generator (Wg) To The Input Shaft; Check Before Assembly Of The Wave Generator; Assembly Of The Wave Generator (Wg) Into The Flexspline (Fs); Assembly Control - Harmonic Drive CSD-2A Component Sets Engineering Data

5.7.3 Assembly of the Wave Generator (WG) to the Input Shaft

Before or after the assembly to the input shaft the Wave Generator is to be lubricated according to section 5.5. During the
assembly the axial mounting position indicated on the catalogue/confirmation drawing is to be considered.
When a clamping element is used please thighten the clamping element screws crosswise and in five steps up to the
torque indicated on the drawing, see also illustration 45.1. When the Wave Generator hub is glued to the input shaft
please consider section 5.4.
Illustration 45.1

5.7.4 Check before Assembly of the Wave Generator

Final check of position of the Wave Generator. For some clamping elements an axial movement may occur during tightening.
Please take account of this effect when positioning the Wave Generator on the shaft.
Check whether the Wave Generator is lubricated in accordance with section 5.5. When the gear is oil lubricated, fill in the
prescribed oil quantity.

5.7.5 Assembly of the Wave Generator (WG) into the Flexspline (FS)

When the Wave Generator is assembled into the Flexspline please consider that the parts must not be tilt during assembly.
By parallel assemby it is ensured that the teeth of Flexspline and Circular Spline mesh symmetrically.
Alternatively the assembly can be executed during slowly rotation of the input shaft (n < 10 rpm). This method eases the
assembly.

5.7.6 Assembly Control

Very rarely, an eccentric tooth mesh, called dedoidal, may occur (see illustration 35.2). The correct assembly can be checked
as follows:
• Check the running behaviour by rotating the input shaft (in case of types with input shaft).
Alternatively you may rotate the output flange. If you notice torque variations these may be caused by eccentric tooth mesh.
• Check the running behaviour and the motor current while the motor is rotating. Strong fluctuations in the motor current
and/or an excessive no-load current may be the result of an eccentric tooth mesh.
In case of a dedoidal assembly you can avoid permanent damage to the gear if the wrong installation is recognized by means
of the above mentioned inspection. The problem can be solved by disassembling the gear followed by a new assembly.
See also pages 35 and 36.
1019659 11/2014
Design examples for Solid Wave Generator
with clamping element.
45