Conclusion - Siemens SINUMERIK 840D Maintenance Manual

FADAL MACHINING CENTERS

5.6.5 CONCLUSION

92
Thermal expansion is a natural occurrence in any machining operation, and, when
ignored, can significantly impact positioning repeatability. By identifying and eliminating
unwanted heat sources, by calculating or measuring expansion effects and altering
positioning accordingly, by performing regular maintenance on the VMC, and by
adopting the machining practices outlined above, the effects of thermal expansion can
be reduced. For higher accuracy requirements, several options can be added to a
standard VMC to further reduce expansion effects. Thermal expansion itself is
unavoidable, but its undesirable effects can be eliminated.
GENERAL INFORMATION MAN-0126_ R1