depth increments

[bobo17]

here's a short arc i've programmed as part of my self teaching lesson. my question is how do i modify this to start at Z.05 then feed down to z-.125 then finally Z-.2 incremently .075 without copying and pasting 3 times. L0100, L0103 ?
T4 M6 (3/8 ENDMILL)
G41 G90
X1.5 Y-1.6 E2 S4000 M3
Z0.05 D4 H4 M8
G1 G90 Z-.125 F10.
G90 G41 X1.5 Y-1.6
G1 Y-1.25 F30
X0.75 Y-1.25 I-0.375 G3
G1 Y-1.6
G1 Z0.05
(ENDING PROG.)
G0 G80 G90 M5 M9
G40
X0 Y0 Z0 E0 H0
M30

[John_B]

Can I ask what is your programming example that you are working from? Your code seems quite jumbled.

[bobo17]

i'm wanting to cut an arc 3/8" rad. starting at point x=1.5, y=-1.25 with arc center at x=1.125, y=-1.25. the endpoint is at x=.75 , y=-1.25. start at z.05 first cut z-.075 then down to z-.2 in .125 increments. my starting point would be off the part at y-1.6. i'm trying to figure out how to do this using line call or subroutine or whatever it takes to keep from copy and paste alot. thanks for any help.