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FLEXO Magazine : October 2009
56 FLEXO OCTOBER 2009 www.flexography.org to allow for cutting a design with dimensions longer than the width of the laser cutter 's working field. It is important to not be confused by various manufacturers' claims on cutting speeds, as this is not particularly relevant to the actual web speed in most applications, which is the all im- portant consideration in actual production. Figures 16 and 17 showing a scalloped edge design created with older technol- ogy that cannot optimize for web speed and the same scal- loped edge design created by today 's better laser cutters that CAN optimize cutting sequences for web speed. Note that the marking speed (a.k.a. cutting speed) is 0.6 seconds in both cases. However, the cutting sequence that is not optimized for web speed proceeds at approximately 9 percent of the web speed shown in Figure 17, where the cutting sequence is optimized for web speed. Figures 18, 19, and 20 (depicting the cut of three rows of Spartanics logos) show further examples of how non-optimized cutting compares to cutting that is only optimized for maximum cutting speed vs. cutting that is also optimized for maximum web speed. In Figure 18 the cutting sequence is not in any way optimized for speed, but instead proceeds along the lines of FIGURE 13. Optimized laser cutting. FIGURE 14. Slitting images. FIGURE 15. Slitting images. FIGURE 16. Lack of optimization during cutting. FIGURE 17. Optimized cutting. TECHNOLOGIES & TECHNIQUES
Sustainable Fall 2009