Hello again!
There are 5 Z parameters for taper machining on my MV. Two of it is calculated when preforming taper initialization. There should be an option for that where you set the alignments of your wire.
The rest of it comes from geometry. It can be totally different on your machine, but the concept should be similar. (My other machine is an AgieCharmiles, and that require similar parameters as well for taper machining)
Here is an example code of one of my taper cuts:
Z1 and Z5 are the actual height of your top and bottom planes of your workpiece from your worktable (can be swapped to achieve inverse taper) and Z2 is just the arithmetic mean of Z1 and Z5.
Code:
Z1=22.352
Z2=42.852
Z5=63.352
N0001G90
N0002G92X0.Y0.
( W1 NORMAL )
N0003M20
M122
N0004M78
N0005M78
N0006M80
N0007M82
N0008M84
N0009G90
N0010G92X0.Y0.
N0011H1=0.251
N0012M90
N0013F2.2E17241
N0014G41G01X0.Y-5.545U0.V-2.243H1
N0015G01X0.131Y-5.542U0.043V0.
N0016G01X0.261Y-5.534U0.045V0.004
N0017G01X0.392Y-5.519U0.042V0.004
N0018G01X0.521Y-5.499U0.044V0.006
N0019G01X0.649Y-5.474U0.043V0.009
(my code is in mm-s but you get the idea )
Hope it helps, but the manual of the machine should be waaaay more specific and accurate on how to set it on your machine.
Good luck!
Mate