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What Is a CNC Engraving and Milling Machine?

Published:

2026-07-08

Author:

None

Abstract:

A CNC engraving and milling machine, also known as an engraving machine, is a type of numerically controlled machine tool used for applications such as optical glass processing, smartphone touch‑screen fabrication, glass drilling, slotting, edge bevelling, PCB fixture production, eyeglass engraving, small‑scale mold making,precision machining of copper electrodes, and the machining of miniature components. This machine is driven by three axes—X, Y, and Z—and its motion is controlled by an electronic controller. It is equipped with a tool magazine and an automatic tool‑changing system. As a highly automated, multifunctional CNC machine, it can perform both engraving and milling operations. Compared with conventional engraving machines, it features a higher‑powered spindle and servo motors, a robust machine bed capable of handling greater loads, and the ability to maintain high spindle speeds—most importantly, it delivers exceptional precision.

During machining, the precision engraving machine can produce holes and slots as small as 0.8 mm in diameter, process glass up to 20 mm thick, and accommodate a grinding head with a 50 mm diameter. Currently, these machines are primarily used for processing glass panels. For a single unit of the basic model, ZDL400SKD‑A, it can handle thin glass ranging from 0.7 to 0.8 mm thick. In rough machining, it processes Φ11 mm holes at approximately 150 holes per hour and 1.2 × 10.9 mm slots at about 200 pieces per hour. During finish machining, it can perform fine grinding of a 53 × 107 mm contour (with a 0.3 mm allowance) at roughly 80 pieces per hour, drill Φ11 mm internal holes (with a 0.15 mm allowance) at around 400 holes per hour, and mill 1.2 × 10.9 mm slots (with a 0.15 mm allowance) at approximately 500 pieces per hour. In actual production, the manufacturing line can be divided into discrete steps, which boosts throughput and improves yield. Based on data provided by current customers, for glass products measuring 107.46 ± 0.02 mm in length, 53.06 ± 0.02 mm in width, and 0.8 mm in thickness—covering edge grinding, drilling, slotting, and other operations—100 precision engraving machines operating for 22 hours can produce roughly 250,000 units. Overall, the dimensional accuracy achievable with this equipment ensures tolerances of ±0.01 mm within 150 mm and ±0.02 mm within 250 mm.

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