Not sure what you want.

I drew it as a line from 0,0 to o,8 with an arc to the x-.5

Then broke it into segments.

Then edit the code and replace X with Z.

G0 Z.1

G1 F10

N0170 Y0.2180 Z-0.0538

N0180 Y0.4367 Z-0.1045

N0190 Y0.6561 Z-0.1522

N0200 Y0.8761 Z-0.1969

N0210 Y1.0968 Z-0.2386

N0220 Y1.3180 Z-0.2771

N0230 Y1.5397 Z-0.3127

N0240 Y1.7618 Z-0.3451

N0250 Y1.9844 Z-0.3745

N0260 Y2.2074 Z-0.4008

N0270 Y2.4307 Z-0.4241

N0280 Y2.6544 Z-0.4442

N0290 Y2.8782 Z-0.4612

N0300 Y3.1023 Z-0.4752

N0310 Y3.3266 Z-0.4860

N0320 Y3.5510 Z-0.4938

N0330 Y3.7755 Z-0.4984

N0340 Y4.0000 Z-0.5000

N0350 Y4.2245 Z-0.4984

N0360 Y4.4490 Z-0.4938

N0370 Y4.6734 Z-0.4860

N0380 Y4.8977 Z-0.4752

N0390 Y5.1218 Z-0.4612

N0400 Y5.3456 Z-0.4442

N0410 Y5.5693 Z-0.4241

N0420 Y5.7926 Z-0.4008

N0430 Y6.0156 Z-0.3745

N0440 Y6.2382 Z-0.3451

N0450 Y6.4603 Z-0.3127

N0460 Y6.6820 Z-0.2771

N0470 Y6.9032 Z-0.2386

N0480 Y7.1239 Z-0.1969

N0490 Y7.3439 Z-0.1522

N0500 Y7.5633 Z-0.1045

N0510 Y7.7820 Z-0.0538

N0520 Y8.0000 Z0.0000

G0 Z1

X0 Y0

M30

My cheapie cad only draws in the x,y plane.

To generate the arc recess in progressive steps would require a CAM I suppose.

I don't have it.

Regards,

Russ