Masked CO2 markers most frequently compete with ink-jet mar

Masked CO2 markers most frequently compete with ink-jet mar

Příspěvekod hotpack » 27 lis 2017 06:32

The beam projects through a multi-element, flat-field lens assembly after reflecting off the final steering mirror.

Mask CO2
Although the mask CO2 does not give the imaging abilities of the beam-steered design, it is far superior in speed. A single pulse of gel wine cooler the laser creates the entire image. The high repetition rate provides marking of parts "on-the-fly" at high part-transfer speeds. Classical applications encompass marking pistons, bearings, valves, gears, and a multitude of other parts in the automotive industry; heart pacemakers, replacement hip joints, and surgical tools in the medical industry; computer chassis, disk drives, and integrated circuits in the electronics industry; tool holders, drill bits, and cutting tools in the tool industry; and writing pens, nameplates, and golf club grips. Classical uses include serialization of ceramic and plastic products that involve high-quality graphics such as company logos and/or significant amounts of additional alphanumeric text.e. The laser output is gated between engraving strokes.
. Depth of penetration is less than the beam-steered CO2 marker since the laser output is spread over a large area with correspondingly low power density.001 inch.

The beam-steered Nd:YAG marker frequently replaces acid and electro-etch systems, stamping and punching systems, and those other marking systems which permanently characteristic products by imprinting or engraving. However, the high peak gel face mask power of the Nd:YAG can most often overcome the higher reflectivity. The Nd:YAG lasers ability to emulate an "optical capacitor" supplies the power necessary to vaporize metallics and other materials.

Beam-steered CO2
The continuous-wave CO2 laser can also be compounded with the beam-steered delivery system.

Mask CO2
Applications that demand high speed but not high power and do not vary the etching image except for alphanumeric text (i. It does not produce high peak powers when pulsed. Industrial laser marking systems provide prospective users with several system designs from which to choose to match the optimum etching performance with the users different requirements. The diminished power CO2 marker does not provide the power to "engrave" substrates but, due to the comparative simplicity of design, can be purchased at a lesser cost than the beam-steered Nd:YAG marker. A 90 watt CW Nd:YAG laser, pulsed at 1 kHz, will emit a train of pulses with peak powers of 110,000 watts.

While the beam-steered design supplies superior imaging and material penetration and the mask design provides superior speed, either system provides a greater collaboration of speed, long-lastingness, and imaging flexibility than other marking methods. This wavelength is most suitable for organic materials such as paper and other wood products, abundant plastics, removing thin layers of ink or paint from a substrate, and for etching ceramics. Each galvanometer provides one axis of beam motion in the engraving field.010 inch or less. This technique is aesthetically limiting in that images exhibit a "stencil" appearance with breaks in the engraving lines.e.005 inches deep in a single pass or better with multiple passes.6 mm. The mask CO2 laser is most often the marker of choice for sequenced coding, batch coding, open or closed date coding, and real-time coding of paper or cardboard, ink or paint coatings, glass, plastics, coated metals, and ceramics. Some overlap does occur among many plastics that absorb both wavelengths equally well. Because drawing with the laser beam creates the image, the etching time is dependent on the amount of text and the complexity of any graphics. To fabricate the engraving image, two beam-steering mirrors mounted on high-speed, computer-controlled galvanometers direct the laser beam across the target surface. Present computer technology produces considerably complex graphics with linewidths and accuracy's of less than 0. Since the mask blocks a high percentage of the laser beam, etching power and resultant surface penetration is limited. The non-metallic items normally affiliated with the far-infrared wavelength of the CO2 laser are usually extremely reflective to the Nd:YAG.

Two marking system designs have emerged with notably unalike strengths and weaknesses.

The development of a successful etching application requires Careful consideration of the laser output characteristics, the design of the optical beam delivery and image generation system, the properties of the target material, and the aesthetic and physical properties of the desired characteristic.
The Nd:YAG laser offers a greater range of adjustable process variables to achieve a specific material modification but at a correspondingly higher purchase price than the CO2 laser. Although not as popular as the beam-steered Nd:YAG and mask CO2 markers, the beam-steered CO2 system is frequently used for engraving general plastics and plastic and ceramic connectors and packages within the electronics industry. In addition, the computer can instantly change any graphic element or the whole engraving program before a new part is positioned for marking. While the part must be stationary while etching with the beam-steered design, parts are marked in motion with mask systems. It also replaces ink jet and other color printing systems. This design offers the user the advantages of a computer generated engraving image and utilization of the entire laser output for the best engraving power achievable.

Process Fundamentals
Laser marking is a thermal process that employs a high-intensity beam of focused laser light to develop a contrasting mark. Because a single pulse of the laser creates the whole image, throughput is Customaryly limited only by the pulse rate of the laser and the transfer speed of the parts handling system. many users also benefit from the non-contact nature of laser engraving and the elimination of additive items such as inks or paints., serialization, date code, etc.

The mask or "stencil" marking system sacrifices image quality and versatility for substantially increased marking speed.

The beam-steered marker can duplicate essentially any vector graphic image with variable line widths and images as minuscule as 0.

Laser and Imaging combinations

Beam-steered Nd:YAG
The combination of the Nd:YAG (Neodymium:Yttrium Aluminum Garnet) laser and the beam-steered delivery optics marks the widest range of items and supplies the versatility of computer controlled image generation.

Advantages and Disadvantages

Beam-steered Nd:YAG
The beam-steered Nd:YAG provides more etching power and far superior imaging than any other laser marker configuration. Metallic items absorb a comparatively high percentage of the light in this region of the spectrum. The accessible high peak power can characteristic or engrave a wide variety of items with hardened metallics.

The beam-steered laser marker supplies the best degree of image engineering. Both engraving system configurations utilize this basis of surface modification but contrast in the method used to project the laser beam and compose the marking image. The Nd:YAG laser marker is the most costly of the three system configurations. The CO2 laser is pulsed at rates of up to 1,200 pulses per minute. The laser beam increases the surface temperature to induce either a pigment change in the material and/or relocate material by vaporization to engrave the surface. Image generation is equal to that of the other beam-steered system while speed and depth of penetration are considerable scaled-down due to the cut back power of the CO2 laser.), computer-controlled rotary stencil wheels index the characters. The high peak power will vaporize material up to 0.

Beam-steered CO2
The acquisition and operating expenses of the beam-steered CO2 marker are lesser than the Nd:YAG marker due to the relative simplicity of the laser. If the alphanumeric characters must be altered part-to-part, (i. Computer controlled masks can alter up to three lines of text at speeds of up to 720 parts per minute if the alphanumeric code must be changed.
CO2 lasers emit a narrow bandwidth of light in the far infrared at 10., serialization, etc. Since their introduction in the early-1970's, laser engravers have evolved as an incisive tool for manufacturers who demand a collaboration of speed, long standing, and image ease of use not accessible from numerous traditional marking technologies. The lens assembly focuses the laser light to achieve the highest power density conceivable on the work surface while maintaining the focused spot travel on a flat plane. Earnest consideration of these laser and imaging optics combinations can provide the perfect tool for a wide range of etching requirements.

Nd:YAG lasers amplify light in the near-infrared at 1.

Typically utilizing laser powers up to 50 watts, these systems combine the far infrared wavelength with the image control and ease of use of beam-steered image generation.

Masked CO2 markers most frequently compete with ink-jet marking.06 mm. In the pulsed mode, the Nd:YAG laser produces peak powers considerably higher than the normal continuous-wave output.) use the mask CO2 marker. The engraving image is created by enlarging the laser beam, projecting it through a copper stencil of the desired image, and refocusing the beam on the target surface to "burn" the image into the material.This year, over 1/3rd of all material processing lasers will be installed for product or package engraving applications.
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