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



Along the way of fault detection of CNC machine tools. it's necessary and effective to utilize some special equipment, which could directly reflect the status of error from the perspective of quantitative analysisHit on What is the precision of CNC machine tools  to explore more about our services and sites. Hope you ll like our more services.

 

1. Vibration measuring instrument

The vibration measuring instrument is probably the most commonly used and basic instrument in vibration detection, used to measure the running of the spindle, the motor and even the entire machine. It can 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 according to the required parameters, vibration frequency and dynamic range, sensor installation conditions, etc. It is simple to use and automatically indicates the status alarm, that is very suitable for the field equipment operation and maintenance personnel to monitor the apparatus status, find problems with time, and ensure the conventional and reliable operation. To be able to meet certain requirements of field test, the instrument is generally converted to portable and pen type.



2. Infrared thermometer

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



Based on the different response forms of infrared radiation, it could be split into two categories: photoelectric detector and thermal detector. Infrared thermometer is employed to detect the parts which can be simple 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 can calibrate the high accuracy (position and geometry) of machine tools and various positioning devices. It can complete the measurement of varied parameters, such as linear position accuracy, repeated positioning accuracy, angle, straightness, perpendicularity, parallelism, and flatness, etc. Additionally, it also offers some selection functions, such as automatic pitch error compensation (applicable to most 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.