Piano Guidance
Piano Guidance
Photo: Ron Lach
Rotary engraving is the engraving method of rotating a cutting tool in a motorized spindle that moves through a substrate to create a groove at a specific depth and in the same geometry and width as the cutter tip.
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Read More »Rotary or mechanical engraving predates the commercial development of laser engraving. The process involves physically removing material with an engraving drill. The drill has a motorized spinning cutter that can engrave through the surface of almost any material. Rotary engraving was initially done by hand, but now there are software-assisted machines. With computerized machines, vector software designs the image and sends it to the machine, translating the vector data along X and Y axes to cut the design. A good software package allows rotary engravers to quickly and easily create text, graphics, and even photographs. Most engraving machine manufacturers provide their proprietary software, either as an option or bundled with their engraving accessories. In addition, some third-party software developers offer engraving-specific programs. These packages are custom-built to drive engraving machines, making communication between the software and the table exceptionally smooth. A vacuum system is needed if engraving acrylic or a flexible plastic engraving stock. It keeps the engraving system clean and controls the depth of cut. If a vacuum system is not used, the depth of cut may change each time the cutter moves up and down. The reason for this variation is because the spindle nosecone may get plastic chips lodged between it and the material surface, causing the depth of cut to be uneven and the machine not to work correctly. The loose chips can also scratch the material's surface when caught between the nosecone and the material and dragged across the surface. A burnishing cutter is a rotating cutter with a multi-faceted tip. These cutters are used with a burnishing adaptor, a spring-loaded mechanism that fits atop the cutter and lets it "float" across the material surface. Burnishing entails skimming away the top lacquered surface of the material and only a small bit of the base metal. Burnishing tools are wider and are available in various tip sizes as with traditional engraving cutters. One of the benefits of burnishing is that it is speedy while allowing very simple single-stroke fonts to be used while still getting a wide cut by using a wide-tipped cutter.
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Read More »Cast acrylic Cast acrylic is ideal for engraving because it turns a frosty white color when engraved. Cast acrylic can be cut with a laser, but it will not result in flame-polished edges. This acrylic material is better suited for engraving.
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