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FADAL MACHINING CENTERS

92 GENERAL INFORMATION MAN-0126_ R1

5.6.5 CONCLUSION

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.

Siemens SINUMERIK 840D Maintenance Manual

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