Re: re:G92 and M99 code uses?

Hi, I am new to this group, and have been going through some of the
archives. This post contains something that has been puzzling me on
my project:

--- In CAD_CAM_EDM_DRO@y..., ballendo@y... wrote:
> Tauseef,
>
> Have you tried:
>
> G21 (metric units)
> G91 (incremental moves)
> G81 x1 R.50 z-5 L49
>
> This one 'G81' line "should" do what you want!
>
> By putting the control in incremental mode, the x1 part of the G81
> will move 1 unit in x before each drill cycle, and the loop L49
> should repeat this process 49 MORE times (after the original
> line/block is executed). You may need to loop 50 times, depends on
> how the internals of the software are/were written.


My question is this: if I am in incremental coordinates, in the G81
line, the x1 should make it move over 1mm from its current location.
But I am unclear on the z-5... does this make the z move down 5mm
from it's current location, or 5mm below the 0 plane or 5mm below the
R plane?

Thanks,
mike