so you wish for half a sphere, with diameter 100 ? tool o12 ? ok

if i give you the toolpath in xyz, can you make it work on your machine ? because i can't, i don't know the g-code for mach3

also, please choose a strategy :
... cut a circle, then make a step in Z, cut another circle, then make a step in Z, and so on
...... or
... continous helix

The sphere is machined from a block 120 x 120 x120mm.
i can deliver a parametric for the finishing

for roughing it would take me longer ... hmm ... what do you say ? are you ok only with finishing ? kindly