[cr2]

Is there a command to make the machine ignore all Z values starting at a certain place in a 3d file? I want the Z to stay at the last specified value without having to go through and manually remove all the Zs.

[txcncman]

No.

[camsys]

You may have already run this job, but here's something for future reference:

depending on your machine/control there may be a Z axis inhibit button on your
machine op panel. Do a program restart at the block before you want to turn off
your Z, and press the button.

I you do not have a button on your control panel, you could also locate the PLC
device for the z axis inhibit and force it high (need to be able to access your plc I/F) after getting to your program start point.

Some controls also offer a G10 that not only writes parameters, but also can
write to PLC registers.

Just some things to try if you ever find yourself in the same situation.

[Kiwi]

I want the Z to stay at the last specified value without having to go through and manually remove all the Zs.

Using notepad or the alike you could use 'Find and Replace'
eg (Fagor Control). Find 'Z' and replace with ':Z'