modality (GROUP 1)

G00 - RAPID TRAVERSE // MODAL

G01

G02

G03

modality (GROUP 3)

G90 - ABSOLUTE SYSTEM PROGRAMMING // MODAL

G90

G91

--------------------

GROUP 1 = g00 (00)

GROUP 3 = g90 (90)

G28 G91  - RETURN TO REFERENCE POINT 

G91 G28 Z0.;

G91 G28 X0.Y0.;

%
O0001
N15 G17 G90 E1 G80 G21 G40 G49
N20 G91 G28 Z0
N25 M01
N30 T4
N35 G90 E1 G00 X-151.876 Y89.625
N40 M3 S2000
N45 G43 Z50.0 H4 M7
N50 G00 X-151.876 Y89.625 Z20.0
N55 G01 X-151.876 Y89.625 Z-5.0 F250.0
N60 G01 X27.815 Y89.625 Z-5.0 F350.0
N65 G01 X27.815 Y-60.486 Z-5.0
N70 G01 X-151.876 Y-60.486 Z-5.0
N75 G01 X-151.876 Y89.625 Z-5.0
N80 G00 X-151.876 Y89.625 Z20.0
N85 G53 Z0.
N90 G90 M05 M09
N95 M30
%