Software, such as??
My controller box doesn't have the ability that I'm aware of. It's an Axxis something, with Gecko drives.
I have figured out I can change velocity during the job, but it requires me to edit the GCode myself as best I can tell, DesKAM 2000 does not allow me to do that when converting the DXF to GCode.
Right now, what I've got to work with is DeskNC DOS, and the Axxis 2.0 controller via LPT. Software power setting would be nice as it would mean I can do raster... and single passes on all jobs, as opposed to doing dual passes now.
If there were a pause command in GCode then I could stack the two jobs in the same file and have it do the lower power setting, wait for me to change the power and do the rest.