Variable Dot vs. Fixed Dot Printheads
Printhead manufacturers of piezo head units usually make two types of heads. The first type is known as a fixed drop or a head using a singular drop size. This drop size can vary, but is fixed by the manufacturer for a given head model. Larger droplets cover more area and are typically used to print lower resolution images for large applications. Billboards can be printed at resolution as low as 30dpi with no visual degradation.
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