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5.7.4
Check before Assembly of the Wave Generator (WG)
• 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 WG is lubricated. When the gear is oil lubricated, fill in the recommended 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 57.1. The correct assembly can be checked as
follow:
• 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
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 of 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.
Illustration 58.1
Right
58
Wrong
(dedoidal)
1021387
12/2018
V02
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