Machine Construction: Optics

BEAM machines use a flying optics configuration. The laser tube is stationary, inside the machine. The laser beam is directed by a series of mirrors that are mounted on a moving gantry. The gantry moves in the Y direction and contains the cutting head that moves in the X direction. The cutting head contains the final mirror and focusing lens that directs the laser beam down to the work surface and focuses the beam to a fine point. Precision optics and beam path are all sealed for safety and long life. BEAM uses only the best available optics.

Most systems use a 5" focal length lens. Other lenses are available for specialized applications.

Crash Sensor System

The cutting head contains a crash sensor. The nozzle assembly is mounted on a magnetic mount, with three electrical contactors. If the nozzle is bumped in any direction, one of the electrical contacts is broken and the machine shuts down. If the nozzle is hit with any force, the entire assembly breaks easily free from its magnetic mount. Reset the machine by simply fitting the assembly back into place.

Auto Focus System

The cutting head includes a mechanical focus sensor. When material is placed on the cutting bed and a file is started, the system moves to the start point of the file and the platform rises vertically until the top of the material touches the focus sensor.

The user can specify an offset from the nominal focus for specialized applications. For example, the machine can be intentionally un-focused for engraving with a wide line.

 

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