This is a simple pattern.
You type in a name
Duplicate the name
Set the original to zero.
Take the duplicate and use the offsetter app to make an offset
combine the offset and set it to full depth
slide the offset behind the original
and “select all”
the center horizontal and vertical.
add support tabs to the outside edge.
Since you will be completely carving away around the letters,
add little support tabs to hold the work until complete.
I used rectangles 1/4 × 1/4 inch set to .001 depth cut.