Compensations (K3); Brief Description - Siemens SINUMERIK 840D sl Function Manual

Compensations (K3)

5.1

Brief Description

Reason
The accuracy of machine tools is impaired as a result of deviations from the ideal geometry,
power transmission faults and measuring system errors. Temperature differences and
mechanical forces often result in great reductions in precision when large workpieces are
machined.
Some of these deviations can usually be measured during commissioning and then
compensated for during operation on the basis of values read by the positional actual-value
encoder and other sensory devices.
Compensation
CNCs provide functions for compensation of the essential causes of error to meet the
increasing demand for precision in machine tools.
For SINUMERIK 840D the following axis-specific compensations can be activated:
● Temperature compensation
● Backlash compensation
● Interpolatory compensation
● Dynamic feedforward control (following error compensation)
● Friction compensation (or quadrant error compensation)
● Electronic counterweight for drives on SIMODRIVE 611D
These compensation functions can be set for each machine individually with axis-specific
machine data.
Extended Functions
Function Manual, 01/2008, 6FC5397-1BP10-3BA0
– LEC
(leadscrew error and measuring system error compensation)
– Sag compensation
(compensation of sag and angular errors)
– Conventional friction compensation
– Quadrant error compensation with neural networks
(with SINUMERIK 840D only)
5
337