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Allegro seems to spread out the required information into
two different files:
art_param.txt parameter file art_aper.txt aperture list
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DEVICE-TYPE GERBER6X00 not interesting OUTPUT-UNITS INCHES Gerber units FILM-SIZE 240000 200000 FORMAT 2.4 required ABORT-ON-ERROR NO SCALE 1 G-CODES NO OPTIMIZE YES STATIONS-PER-WHEEL 999 COORDINATES ABSOLUTE absolute or incremental SUPPRESS-LEAD-ZEROES YES leading zero suppression SUPPRESS-TRAIL-ZEROES NO SUPPRESS-EQUAL YESAperture List
Comments
FLASH - probably a custom aperture LINE - a circular aperture used for draw commands... TREL - a thermal relief the diameter is probably the OD....
INPUT-UNITS INCHES WHEEL 1 CIRCLE 175 D10 CIRCLE 250 D11 FLASH TREL175 0 D12 CIRCLE 200 D13 SQUARE 85 0 D14 CIRCLE 50 D15 FLASH DOT 0 D16 CIRCLE 32 D17 CIRCLE 44 D18 CIRCLE 60 D19 CIRCLE 85 D20 FLASH TREL060 0 D21 CIRCLE 70 D22 RECTANGLE 60 60 0 D23 RECTANGLE 65 65 0 D24 CIRCLE 75 D25 CIRCLE 105 D26 FLASH TREL075 0 D27 CIRCLE 58 D28 CIRCLE 68 D29 CIRCLE 110 D30 CIRCLE 180 D31 CIRCLE 130 D32 RECTANGLE 90 25 0 D33 RECTANGLE 25 90 0 D34 LINE 8 D60 LINE 10 D61 LINE 12 D62 LINE 20 D63 LINE 15 D64 LINE 5 D65