09.04.2018 Views

Important Considerations for laser marking an identifier on die-casting

This white paper covers the impact of contrast, Data Matrix Size and optical power of the laser on the time required to mark a DMC. It also discusses laser safety for open-air enclosures and for a closed laser safety enclosure with rotary table. But why stop at that. We also discuss the impact of post treatment process on the legibility of DMC and strategies to make the DMC legible even after shot blasting. Have a look, you'll be glad you did. Feel free to contact us at: https://www.laserax.com/company/contact-us Browse our website at: https://www.laserax.com/ Get in touch on our social media channel: Facebook: https://www.facebook.com/Laserax/ LinkedIn: http://bit.ly/2f8sKYz Twitter: https://twitter.com/Laserax_inc Google+: http://bit.ly/2vtaFeH YouTube: http://bit.ly/2u4i1oN Xing: https://www.xing.com/xbp/pages/laserax Instagram: https://www.instagram.com/laserax_inc/ Viadeo: http://www.viadeo.com/fr/company/laserax Learn more on our laser marking & traceability, laser cleaning and safety standards blog Blog: https://blog.laserax.com/

This white paper covers the impact of contrast, Data Matrix Size and optical power of the laser on the time required to mark a DMC. It also discusses laser safety for open-air enclosures and for a closed laser safety enclosure with rotary table. But why stop at that. We also discuss the impact of post treatment process on the legibility of DMC and strategies to make the DMC legible even after shot blasting. Have a look, you'll be glad you did.

Feel free to contact us at: https://www.laserax.com/company/contact-us

Browse our website at:
https://www.laserax.com/

Get in touch on our social media channel:
Facebook: https://www.facebook.com/Laserax/
LinkedIn: http://bit.ly/2f8sKYz
Twitter: https://twitter.com/Laserax_inc
Google+: http://bit.ly/2vtaFeH
YouTube: http://bit.ly/2u4i1oN
Xing: https://www.xing.com/xbp/pages/laserax
Instagram: https://www.instagram.com/laserax_inc/
Viadeo: http://www.viadeo.com/fr/company/laserax

Learn more on our laser marking & traceability, laser cleaning and safety standards blog
Blog: https://blog.laserax.com/

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Figure 2- Laser marked <str<strong>on</strong>g>identifier</str<strong>on</strong>g> <strong>on</strong> a 3D surface made with a 3D head<br />

CYCLE TIME VS SIZE AND COMPOSITION OF THE IDENTIFIER TO MARK<br />

The size <str<strong>on</strong>g>an</str<strong>on</strong>g>d compositi<strong>on</strong> of the <str<strong>on</strong>g>identifier</str<strong>on</strong>g> is directly linked to the time required to per<str<strong>on</strong>g>for</str<strong>on</strong>g>m the <str<strong>on</strong>g>marking</str<strong>on</strong>g>. Table 1 below shows<br />

<str<strong>on</strong>g>an</str<strong>on</strong>g> experimentally developed timing rule of thumb <str<strong>on</strong>g>for</str<strong>on</strong>g> <str<strong>on</strong>g>marking</str<strong>on</strong>g> high c<strong>on</strong>trast square 2D codes (of given side lengths) <strong>on</strong><br />

aluminum, c<strong>on</strong>sidering no post treatments are needed. An example of the corresp<strong>on</strong>ding c<strong>on</strong>trast is shown in figure 3.<br />

Table 1- Time to mark 2D code <str<strong>on</strong>g>an</str<strong>on</strong>g>d white background (quiet z<strong>on</strong>e of 1 mm around the code).<br />

Data Matrix size 30 W 50 W 100 W<br />

10 mm 4.1 s 2.2 s 1.2 s<br />

15 mm 8.9 s 4.8 s 2.5 s<br />

20 mm 14.9 s 8.4 s 4.3 s<br />

25 mm 23.0 s 12.9 s 6.5 s<br />

Figure 3- Laser marked Data Matrix <strong>on</strong> aluminum with the LXQ-100 (a 100 W <str<strong>on</strong>g>laser</str<strong>on</strong>g> marker). The size of the code is<br />

20mm x 20 mm <str<strong>on</strong>g>an</str<strong>on</strong>g>d the individual cell size is 2 mm. Time to mark is 4.3 sec<strong>on</strong>ds.<br />

As it is adding black area, <str<strong>on</strong>g>marking</str<strong>on</strong>g> alph<str<strong>on</strong>g>an</str<strong>on</strong>g>umeric characters under the code will also add some time to the process. The height<br />

<str<strong>on</strong>g>an</str<strong>on</strong>g>d the width of these characters will then have <str<strong>on</strong>g>an</str<strong>on</strong>g> import<str<strong>on</strong>g>an</str<strong>on</strong>g>t effect <strong>on</strong> the overall time <str<strong>on</strong>g>for</str<strong>on</strong>g> <str<strong>on</strong>g>marking</str<strong>on</strong>g> so it is import<str<strong>on</strong>g>an</str<strong>on</strong>g>t to adjust<br />

them based <strong>on</strong> the real needs. Table 2 shows typical <str<strong>on</strong>g>marking</str<strong>on</strong>g> time per character (in Arial or similar) depending <strong>on</strong> the height<br />

of the character <str<strong>on</strong>g>an</str<strong>on</strong>g>d the <str<strong>on</strong>g>laser</str<strong>on</strong>g> power.<br />

Table 2- Average time to mark <strong>on</strong>e character without white background<br />

Character height 30 W 50 W 100 W<br />

5 mm 0,40 s 0,25 s 0,14 s<br />

10 mm 1,52 s 0,89 s 0,45 s<br />

15 mm 3,38 s 1,95 s 0,96 s<br />

20 mm 5,9 s 3,41 s 1,64 s

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