exist3D printingIn the field, a laser scanner is a device that locates the relative position of a model by scanning, thereby outputting a modeling file.The accuracy of the laser scanner and3D printingThe degree of integration of the machine also means whether the accuracy of unfamiliar production is sufficient for user needs. Recently, laser beam expert PRIMES has launched a new laser scanner characterization device that can be combined with selective laser melting (SLM)3D printingUse with the machine.
SFM laser characterization equipment
The ScanFieldMonitor (SFM) is described as being used for any all-in-one diagnostic product and all laser beam and laser scanner equipment, as well as granting users the power to determine the various parameters of their laser source.Therefore, the design of stand-alone equipment aims to achieve better process optimization and system certification, so that users can better calibrate their laser-based3D printingMachine for industrial3D printing.
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The parameters of the laser beam and the scanner are determined using the light scattered on the engraved measurement structure
According to PRIMES, the industry3D printingThe quality assurance of the company has fallen behind. Compared with traditional laser welding, the diagnostic technology of laser beam is very mature. SLM 3D printingStill rely heavily on the dynamics of the printer scanning system. As more and more manufacturers integrate SLM into their process chain more and more, complex laser scanner characterization instruments are required to set quality standards and ensure verification.
SFM uses a patented laser characterization method that uses a glass plate engraved with a series of 10-15 micron thick measurement lines. When the user scans the laser beam on the board, the photodiode measures the light scattered by each engraving line. This process can be used to determine the path of the laser beam on the SFM, caustics and field flatness.
Then, using the sampling rate of the integrated photodiode, SFM is able to calculate the propagation speed of the laser from the beginning to the end of the path. As a result, PRIMES’s proprietary algorithm can analyze several complex relationships, such as pincushion distortion, the merging of overlapping scan fields, and even the delay of laser activation and deactivation. Since data acquisition is completed within the time (several milliseconds) required to write the scan vector, the device is also suitable for time-resolved analysis, such as thermal lens inspection.
In order to accurately position the laser fusion trajectory in the powder bed, it is essential to synchronize the laser irradiation sequence with the movement of the scanning mirror. Given that SFM provides absolute positioning information, the instrument can finally be used to calibrate these two basic parameters.
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SFM’s glass plate structure
The main selling point of SFM is its comprehensiveness, because it integrates multiple measurement functions into one device. This makes the instrument independent of the scanner, allowing it to characterize any laser-based scanning system thrown on it. Ultimately eliminate the need for multiple capital investments, and greatly reduce the complexity of the work process, and ultimately save time and cost for users.
The size of the system is 80 x 80 x 100mm, it is also very compact and can be placed anywhere in the printer building room. PRIMES even added an Ethernet interface and a WLAN module, so you can3D printingOutside the machineremote controlSFM. Unlike traditional beam diagnostic equipment, this system can analyze the beam at full power, so measurements can be made under actual operating conditions.
(Editor in charge: admin)
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