apwheel.txt
last modified 16 oct 97 - mjh

We have defined one default "wheel" of apertures for photoplotting
purposes. They are defined in the uofi.acf and uofi.dac files in your
pcb folder.

***DO NOT*** try to edit these from within VBPCB! Due to the rather
large table size, and certain semantic inconsistancies, if you
try to use the "Setup - DCodes to Apertures" utilitiy in VBPCB
and read in uofi.dac, it will become corrupted. Leave it alone.
Go ahead and look at the uofi.dac file with Notepad; it is just
an ASCII file. But don't change it.

And *please* don't send this file off to the PCB fab house when
you are making a board! The file is nearly 200 KBytes long
and contains over 3000 lines of text! A typical PCB fab
project uses 30 aperatures, tops. Don't ask them to do
100 times more work than they need to...

We have some simple tools to identify what apertures you *do* use;
if nothing else "cat *.gdo | grep "G54" | sort | uniq" will do the job.

= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = 
APERTURE D-codes in GERBER wheel and FORMATTER table (1996 Aug 5)


DRAWS:  
     MIL-  00x 01x 02x 03x 04x 05x 06x 07x 08x 09x   MIL - 1x0 2x0 3x0 4x0 5x0
       |   --- --- --- --- --- --- --- --- --- ---     |   --- --- --- --- ---
     xx0 -   . D20 D30 D34 D38 D40 D42 D44 D46 D48   x0x - D50 D60 D62 D64 D66
     xx1 - D11 D21   .   .   .   .   .   .   .   .   x1x - D51   .   .   .   .
     xx2 - D12 D22 D31 D35   .   .   .   .   .   .   x2x - D52   .   .   .   .
     xx3 - D13 D23   .   .   .   .   .   .   .   .   x3x - D53   .   .   .   .
     xx4 - D14 D24   .   .   .   .   .   .   .   .   x4x - D54   .   .   .   .
     xx5 - D15 D25 D32 D36 D39 D41 D43 D45 D47 D49   x5x - D55 D61 D63 D65   .
     xx6 - D16 D26   .   .   .   .   .   .   .   .   x6x - D56   .   .   .   .
     xx7 - D17 D27 D33 D37   .   .   .   .   .   .   x7x - D57   .   .   .   .
     xx8 - D18 D28   .   .   .   .   .   .   .   .   x8x - D58   .   .   .   .
     xx9 - D19 D29   .   .   .   .   .   .   .   .   x9x - D59   .   .   .   .


ANNULAR RINGS:
     MIL--  00x  01x  02x  03x  04x  05x  06x  07x  08x  09x
       |    ---  ---  ---  ---  ---  ---  ---  ---  ---  ---
     xx0 -    .  D67  D69  D71  D73  D75  D76  D77  D78  D79
     xx5 -    .  D68  D70  D72  D74    .    .    .    .    .

     MIL--  1xx  2xx  3xx  4xx  5xx  6xx  7xx
       |    ---  ---  ---  ---  ---  ---  ---
     x00 -  D80  D84  D86  D88  D90    .    .
     x20 -  D81    .    .    .    .    .    .
     x50 -  D82  D85  D87  D89    .    .    .
     x70 -  D83    .    .    .    .    .    .


MOIRE TARGETS:
     MIL--  0xx  1xx  2xx  3xx  4xx  5xx  6xx  7xx  8xx  9xx
       |    ---  ---  ---  ---  ---  ---  ---  ---  ---  ---
     x00 -    .  D91  D92  D93  D94  D95    .    .    .    .


FLASHES: / = skipped:
d=D1 for ROUND pads, d=D2 for SQUARE pads, d=D3 for THERMAL pads

     MIL--- 00x  01x  02x  03x  04x  05x  06x  07x  08x  09x
       |    ---  ---  ---  ---  ---  ---  ---  ---  ---  ---
     xx0 --   .  d10  d20  d30  d34  d38  d40  d42  d44  d46
     xx1 -- /01  d11  d21    .    .    .    .    .    .    .
     xx2 -- /02  d12  d22  d31  d35    .    .    .    .    .
     xx3 -- /03  d13  d23    .    .    .    .    .    .    .
     xx4 -- /04  d14  d24    .    .    .    .    .    .    .
     xx5 -- d05  d15  d25  d32  d36  d39  d41  d43  d45  d47
     xx6 -- d06  d16  d26    .    .    .    .    .    .    .
     xx7 -- d07  d17  d27  d33  d37    .    .    .    .    .
     xx8 -- d08  d18  d28    .    .    .    .    .    .    .
     xx9 -- d09  d19  d29    .    .    .    .    .    .    .

     MIL--- 1x0  1x5  2x0  3x0  4x0  5x0  6x0  7x0  8x0  9x0
       |    ---  ---  ---  ---  ---  ---  ---  ---  ---  ---
     x0x -- d48  /49  d68  d78  d82  d86  d88  d90  /92  /94
     x1x -- d50  /51  d69    .    .    .    .    .    .    .
     x2x -- d52  /53  d70  d79  d83    .    .    .    .    .
     x3x -- d54  /55  d71    .    .    .    .    .    .    .
     x4x -- d56  /57  d72    .    .    .    .    .    .    .
     x5x -- d58  /59  d73  d80  d84  d87  d89  /91  /93  /95
     x6x -- d60  /61  d74    .    .    .    .    .    .    .
     x7x -- d62  /63  d75  d81  d85    .    .    .    .    .
     x8x -- d64  /65  d76    .    .    .    .    .    .    .
     x9x -- d66  /67  d77    .    .    .    .    .    .    .


RECTANGULAR SMD PADS:  D400 throught D999