SJ6000 laser interferometer

Machine tool pitch calibration

In the machine tool industry, laser interferometers are a very important tool. They are commonly used for CNC machine tool accuracy detection and compensation (often referred to as “laser calibration”). Let’s take a closer look at when laser interferometer calibration is necessary.

1、 Newly manufactured CNC machine tools factory test and use site acceptance

The use of laser interferometers in the commissioning of machine tools before leaving the factory

CNC machine tools in the assembly is completed, its positioning accuracy is generally not up to the factory standard requirements, purely by improving the accuracy of parts machining, or improve the quality of assembly to ensure the accuracy of the machine tool will greatly increase the manufacturing cost, and the use of CNC systems, "pitch error compensation" function, the CNC machine tool to compensate for the error, is an effective and economical method, the SJ6000 laser interferometer can be accurately measured and compensated for. SJ6000 laser interferometer can accurately measure and compensate the error.

2、 CNC machine tools processing parts over the difference, the accuracy of the recovery calibration

Laser interferometer recalibration for machine tool accuracy

Any machine tool processing equipment, in a long time of use will be due to their own wear and tear or some other reasons for the occurrence of processing overruns. Generally, when this situation occurs, it is necessary to use the laser interferometer for precision recalibration, SJ6000 laser interferometer can simultaneously measure the machine tool pitch error value and backlash (also known as backlash), through the precision recalibration, the machining accuracy will be greatly improved. The SJ6000 laser interferometer can simultaneously measure the pitch error value and backlash (also known as backlash) of the machine tool, and the machining accuracy will be greatly improved through the precision recalibration.

3、 CNC machine tools after overhaul (such as the replacement of bearings, guideways, screws, feed motors, etc.) calibration

Laser interferometer re-measurement and compensation after machine repair

When the machine tool has been overhauled, there are changes in the accuracy and position on the assembly, and at this time it is necessary to compensate for the pitch error in the re.
In the installation of the screw, the screw lock nut is tightened very tightly, the screw pre-pull is too large, the screw will be stretched, the pitch becomes longer, which has less impact at the starting point, but near the end because of the accumulation of errors in the pitch, which will produce a large positional error. Similarly, if the pre-stretch is too small, the pitch will also become smaller.

When installing the screw bearing seat, be sure to knock the taper pin in place, otherwise the screw as a whole and the guide rail is not parallel to the pitch becomes smaller, at this time it can be measured by the SJ6000 laser interferometer, for the most correct compensation of pitch error, so that the equipment accuracy to meet the requirements.

4、CNC machine tools for regular maintenance calibration

Laser interferometer for regular inspection and compensation of machine tools

With the continuous use of CNC machine tools, machine tools continue to produce wear and tear, the accuracy will produce changes, at this time it is necessary to carry out a regular maintenance of the machine tool to extend the service life of the machine tool. The first maintenance of the geometric accuracy of the machine, followed by positioning accuracy, which requires a laser interferometer to detect compensation.

CNC machine tools "playing laser" notes

1. When installing the mirror group of the laser interferometer, make sure it is firm.

2. The temperature of the site should not change greatly, the temperature of the site and environmental factors have a great influence on the measurement results.

3. Use the correct compensation method, pitch compensation and backlash need to be correctly compensated, according to different systems to carry out different compensation methods.

4. After compensation, there is not much difference in accuracy, and the measurement can be compensated again.

5. Measurement of the value of the jump is very large, check whether the shield is smooth, whether the machine is sufficient time (recommended 36 hours of break-in), whether the machine is in a hot state (recommended stopping the machine to cool down for more than 45 minutes);.

6. If all of the above do not meet the accuracy requirements, the probability is that the machine tool assembly problems, it is recommended to re-engineer the mechanical assembly debugging process.