System integration 7.1 System requirements
Note
In systems where direct drives are used on controlled infeeds, electrical oscillations can occur with respect to ground potential. These oscillations are, among other things, influenced by:
∙The lengths of the cables
∙The rating of the infeed/regenerative feedback module
∙The number of axes
∙The size of the motor
∙The winding design of the motor
∙The type of line supply
∙The place of installation
The oscillations lead to increased voltage loads and may damage the main insulation! We thus recommend using an HFD commutating reactor with damping resistance for damping the oscillations. For specific details, refer to the documentation of the drive system being used or contact your local Siemens office.
Accuracy
The accuracy of a direct drive with torque motor is governed by the:
●Mechanical design of the machine
●Control technology used
●Resolution and measuring accuracy of the encoder
Mechanics
The potential machining accuracy of a drive system with torque motor is influenced by the:
●Mechanical rigidity and noise immunity of the drive system
●Running smoothness
The running smoothness in the axial and radial direction depends on the bearing version and its accuracy. The requirements here can be fulfilled by means of a suitable axes design.
Control quality
The control quality of a direct drive with torque motor is governed by the:
●Rigidity of the drive system (dynamic quality of the housing and machine construction, bearing, encoder installation)
●The precision when mounting and adjusting the encoder system
1FW6 | 107 |
Configuration Manual, 05/2009, |
