Pneumatic dot peen engravers use compressed air to drive a hardened steel pin (peen) against the workpiece. The repeated impacts of the peen create dots that form letters, numbers, or other symbols. The process typically involves the following steps:

• Compressed Air Supply: The engraver is connected to a source of compressed air.
• Control Unit:The operator enters the desired marking information (text, numbers, or symbols) into a control unit.
• Pneumatic Cylinder: The control unit activates a pneumatic cylinder, which converts compressed air into mechanical energy.
• Marker Head: The pneumatic cylinder drives a marker head, which houses the peen.
• Peen Impact:The peen is repeatedly struck against the workpiece, creating dots that form the desired marking.
• Movement: The marker head is typically moved across the workpiece to create the complete marking.

The depth and spacing of the dots can be adjusted by controlling the air pressure, the speed of the marker head, and the number of impacts per dot. Pneumatic dot peen engravers can be used to create a wide variety of markings, including simple text, complex symbols, and even barcodes.