What we did in terms of engraving is do tests starting out at what we thought was a good figure and then increasing speed by 10% (or decreasing) and then fine tuned a speed figure. Ie not better at 12% speed and 50%power (if extrpolating to a faster machine you must slow down the speed) but something like 20% speed and 80% power (just using those figs as an example). It was actually a good thing as we tried different ppi, dpi, power and speeds and found that lets say engraving at 25% speed and 50% power was actually better at some other arb setting of both parameters. we were using a slightly higher powered and different make of source with different beam quality and characteristics. We tried existing settings and extrapolating but it didnt work well, so reprofiled most of our settings from scratch.
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