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 escalation in production will influence tolerance, further affect the accuracy of CNC parts, so regular calibrations of CNC machine tools are necessary 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 utilize some special equipment, which can directly reflect the status of error from the perspective of quantitative analysis 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.
1. Vibration measuring instrument
The vibration measuring instrument is probably the most commonly used and basic instrument in vibration detection, used to gauge 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. Different types of sensors could be selected in line with the required parameters, vibration frequency and dynamic range, sensor installation conditions, etc. It is straightforward to use and automatically indicates the status alarm, that will be very ideal for the field equipment operation and maintenance personnel to monitor the equipment status, find problems in time, and ensure the normal and reliable operation. To be able to meet certain requirements of field test, the instrument is generally changed to portable and pen type.
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 into the measurement of the radiation power. The infrared detector and corresponding optical system are used to receive 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 divided into two categories: photoelectric detector and thermal detector. Infrared thermometer is used to detect the parts which are simple to heat in CNC machine tools, such as for example 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 found in the accuracy detection of CNC machine tools, it may calibrate the high accuracy (position and geometry) of machine tools and various positioning devices. It can complete the measurement of various parameters, such as for example linear position accuracy, repeated positioning accuracy, angle, straightness, perpendicularity, parallelism, and flatness, etc. Furthermore, it also has some selection functions, such as for example automatic pitch error compensation (applicable to many 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 can 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.