0391539-A2 is referenced by 11 patents and cites 5 patents.

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(32a,32b) to move a laser beam in two dimensions relative to the workpiece. The X-Y assembly employs a X proportional-integral-differential (PID) controller (34a) and a PID (34b) to generate control signals for moving the X-Y assembly. The PIDs generate the control signal based upon the current position of the laser beam and a target position for the laser beam. The current position is provided by encoders (36a,36b) operatively attached to motors (38a,38b) that, in turn, move mirrors (44a,44b) 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.

Title
Laser engraver with x-y assembly and cut control.
Application Number
EP19900302457 19900308
Publication Number
0391539 (A2)
Application Date
March 8, 1990
Publication Date
October 10, 1990
Inventor
Doran John
US
Garnier Steven F
US
Assignee
Melco
US
IPC
G05B 19/25
B23K 26/10
B23K 26/08
B23K 26/02
B23K 26/00
B23K 26/36
B23K 26/08
B23K 26/02
B23K 26/00
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