ISO TR 17243-2:2017 pdf free

ISO TR 17243-2:2017 pdf free.Machine tool spindles一Evaluation of spindle vibrations by measurements on non-rotating parts
When measuring vibration, the operational condition of the machine tool is of great importance. This document is applicable to all normal operational conditions of the machine tool when machining.
For any spindle vibration measurement intended to characterize the spindle condition according to this document, important operational conditions should be recorded. Such operational conditions include,but are not limited to, the characteristics listed in 4.2 to 4.11.
When using vibration measurement results for evaluation of spindle condition, other factors contributing to or interfering with the measured signals should be taken into consideration. Such factors include spindle motor current control signals with their associated frequencies, influences of machine foundation and the position of the other moving components affecting the dynamic response of the overall system, and possible high level of scatter due to low energy content in the frequency range of interest. If such interfering signals or conditions are suspected, frequency analysis techniques can be used to differentiate bearing signals from other contributing factors.
All vibration measurements should be made under no-load conditions (no cutting, milling, or grinding).
This document is applicable for every speed within the nominal speed range of the machine tool/spindle.The manufacturer may specify non-continuous speed ranges such as 600 r/min to 17 000 r/min or 19000 r/min to 24 000 r/min in order to avoid unreasonable limits at resonance speeds. Two such resonance speed intervals are allowed, together occupying a maximum of 10 % of the nominal operating speed range of the spindle. The possibility of excluding certain speed ranges only applies to the vibration velocity parameter as defined in 6.1, i.e. indicators for long term spindle condition (LTSC).
Thermal conditions will need to be agreed upon between manufacturer/supplier and user. If no conditions are specified, the tests should be made under conditions as near as possible to those of normal operation with regards to lubrication and warm-up. Therefore, the machine should have an idle running performance in accordance with the conditions of use and the instructions of the manufacturer until the machine/spindle has reached steady-state operating temperature. Refer to ISO 230-1 for the installation of the machine before testing and warming up of the spindle and other moving components.ISO TR 17243-2 pdf download.