Unsupported RS274D/RS274X Commands

Some Gerber and RS274X commands are rarely if ever used for microelectronic applications or were created to support machines that were built in extremely limited quantities. GBR2MIC will not support these commands:

Vape
Binary Extended Format
unconnected outlines
Line and Arc tapering
Parabolic and Cubic interpolation commands
draws with special apertures (squares and rounds are allowed)
references to external files
G62 programmable mirror
D00, D99 and M64 outline commands.

RS274X Exceptions

The following commands, if encountered, will be reported in the log file but will not be acted upon. The operator can then determine whether they are safe to ignore or whether some transformations should be made further down the process.

AP - aperture offset
AF - auto focus
AS - axis select
AR - aperture record
BD - block delete
DL - dash line
IF - include file
ID - input display
IJ - image justify
IC - input code
IO - image offset
KO - knock out
MI - mirror

LN - layer name
LS - load symbol
OF - offset
PE - perspective
PK - park
RC - rotate symbol
RO - rotation
SM - symbol mirror
SS - symbol scale
TR - translation
VL - velocity limit
WI - window specification
LN - Level Name

Additional Restrictions

Apertures may not be redefined within a 274X file.¹
Apertures may not be redefined within a group of 274D files.
Only one 274X file may be loaded into GBR2MIC for processing.
Custom apertures not supported for RS274D
A maximum of 9990 apertures for RS274D
A maximum of 40000 apertures for RS274X¹
A maximum of 65000 internal paint/scratch layer in RS274X file¹

¹ - the split274x program automatically detects these conditions and corrects them.