What's CNC machine calibration and why calibrate the equipment tool

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CNC machine calibration is to diagnose and correct errors after testing of the equipment tool based on standard data for determining the accuracy, precision, repeatability. The continuous increase in production will influence tolerance, further affect the accuracy of CNC parts, so regular calibrations of CNC machine tools are necessary in order to avoid instrument deviation from its tolerance level and maintain the proper working condition. You need to calibrate the equipment tool in the next situations:



- CNC machine has been newly set

- CNC parts have out of tolerance

- CNC machine recently crashed or changed the workshop

Instruments for Calibrations of CNC Machine Tools - Instruments to Verify the Accuracy



In the act of fault detection of CNC machine tools. it's necessary and effective to make use of some special equipment, which could directly reflect the status of error from the perspective of quantitative analysis



1. Vibration measuring instrument

The vibration measuring instrument is probably the most commonly used and basic instrument in vibration detection, used to assess the running of the spindle, the motor and even the complete machine. It may amplify, transform, integrate and detect the weak signal of the vibration sensor, and directly display the vibration value of the tested equipment on the instrument or display screen. Several types of sensors can be selected in line with the required parameters, vibration frequency and dynamic range, sensor installation conditions, etc. It is simple to work and automatically indicates the status alarm, which can be very ideal for the field equipment operation and maintenance personnel to monitor the gear status, find problems over time, and ensure the conventional and reliable operation. In order to meet certain requirements of field test, the instrument is generally changed to portable and pen type.Hit on What is the precision of CNC machine tools  to explore more about our services and sites. Hope you ll like our more services.

 

2. Infrared thermometer

Infrared temperature measurement is applying the principle of infrared radiation, convert the measurement of the outer lining temperature of the machining part in to the measurement of the radiation power. The infrared detector and corresponding optical system are accustomed to get the invisible infrared radiation energy of the measured part, and transform it into other designs for display and recording.



Based on the different response kinds of infrared radiation, it could be divided in to two categories: photoelectric detector and thermal detector. Infrared thermometer can be used to detect the parts which can be an easy task to heat in CNC machine tools, such as power module, wire contact, spindle bearing, etc. The instruments that utilize the infrared principle to measure temperature include infrared thermal television, optical scanning thermal detector and focal plane thermal imager. The infrared diagnosis are mainly through temperature judgment, similar comparison, file analysis, relative temperature difference and piggyback anomaly method.



3. Accuracy measuring instrument

The laser interferometer is mainly used in the accuracy detection of CNC machine tools, it could calibrate the high accuracy (position and geometry) of machine tools and various positioning devices. It may complete the measurement of various parameters, such as linear position accuracy, repeated positioning accuracy, angle, straightness, perpendicularity, parallelism, and flatness, etc. In addition, it even offers some selection functions, such as automatic pitch error compensation (applicable to the majority of CNC Systems), measurement and evaluation of dynamic characteristics of machine tools, calibration of rotary coordinate indexing accuracy, trigger pulse input/output function, etc. Laser interferometer may be used in high accuracy, high efficiency, and convenient use. The measuring length can reach even tens of meters, and the accuracy can reach micron level.