It worked in my back plotter after I added decimal points.
Code:
:0070(WELDINGFIXTURE)
(S)(HMT)(JENS)
G1902 B188. D157.5 H20. I94. J78.75 K0.
T22 (6MM.SGS.END-MILL)
M6
G0 G90 G54.1 P20 X0 Y0 S8000 M3
G43 Z3 H22 D22 M8
M98 P0071
G68 X0 Y0 R120. (Added DP)
M98 P0071
G68 X0 Y0 R240. (Added DP)
M98 P0071
G69
G0 G90 Z250 M9
G0 G91 G28 Z0 Y0 M5
M30
:0071 (SUBPROGRAM FOR SLOT)
G0 X0 Y-4. (Added DP)
G0 Z-6. (Added DP)
G1 Y-16.775 F400
G1 Y-10. (Added DP)
G1 G41 X1.51 Y-13.51
G3 X5.01 Y-10. R3.5 (Added DP)
G1 Y0 ,R3
G1 X-5.01 ,R3
G1 Y-16.775
G3 X5.01 Y-16.775 R5.01
G1 Y-10. (Added DP)
G3 X1.51 Y-6.5 R3.5
G1 G40 X0 Y-10. (Added DP)
G0 Z3
G0 X0 Y0
M99