Laser engraver with X-Y assembly and cut control

Details Laser engraver with X-Y assembly and cut control Laser engraver with X-Y assembly and cut control

1989-04-04

1990-11-13

Miller, Jr., George H.

Facsimile and static presentation processing

Facsimile

Recording apparatus

36447408, 21912178, 21912168, 21912169, H04N 1032, B23K 2608, G06F 1546

Patent

active

049706004

ABSTRACT:
The present invention provides a laser engraver for engraving a pattern on a workpiece. The pattern is established on the workpiece by using a X-Y assembly to move a laser beam in two dimensions relative to the workpiece. The X-Y assembly employs a X proportional-integral-differential (PID) controller and a Y PID to generate control signals for moving the X-Y assembly. The PIDs generate the control signal based upon the current positon of the laser beam and a target position for the laser beam. The current position is provided by encoders operatively attached to motors that, in turn, move mirrors that direct the laser beam to the workpiece. The depth of cut is, preferably, controlled by using the integral of the difference between the position of the laser beam as it is moved by the X-Y assembly and a reference position. Alternatively, proportional control based upon the absolute difference between the position of the laser as it is moved by the X-Y assembly and the reference position can be utilized.

REFERENCES:
patent: 4354196 (1982-10-01), Neumann et al.
patent: 4640382 (1987-02-01), Hartman
patent: 4725709 (1988-02-01), Mattelin
Product Literature of Laser Machining, Inc. of Somerset, Wisconsin.
Product Literature of General Scanning of Watertown, Massachusetts.

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