From what I read on the screens of the Excellon CNC-5 & 6 controllers steps
are executed upon read. HOWEVER, if, by chance an error has crept into the
drill code say at T8, I have had machines stop at T3, T4, up to T8.  I
believe this is due to buffer size in the machine itself.

Nesting of steps:
FMAT,2                          FMAT,1

M01                             M24
M04                             R02M26X05Y
R02M02X05Y                      M26
M02XY                           M24
M02XY06                 M26XY06
M02XY                           M26
M08M30                  M27

This will result in a pattern of 6 total pieces (3 along the 'X' axis & 2
along the 'Y' axis)

A caution about nested steps, some software/machines can only handle 2 sets
of 'nests' the above example shows only 1.

Hope  this helps:

JOE SENDZ......

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