I hand-coded the numbers and will be running some tests today. I learned about machining ovals using the four arc method due to all the ovals in numbers. The key point being that the axis of the middle arc is collinear with the axis of the starting arc and the point where they intersect. Also, the sum of both arcs is 180 degrees.
I also had to figure out how mirroring and 90 degree rotation work from the simple perspective of X,Y,Z,I,J & K, and how to convert code from XY plane to XZ plane.
The way Deckel designed the geometry of the machine, it is harder than it should be to transfer a g-code program from the XY plane to the XZ plane. I.e. from the perspective of the cutting tool (or the reader of a font), +X is to the right in the XY plane but it goes to the left in the XZ plane. Which means to convert a program written for XY plane to XZ, you change X to -X, Y to Z, I to -I and J to K. And if you want to change a font that reads left to right in XY plane to one that reads up to down in XZ plane (design change, mea culpa), you change X to -Y, Z to -X, I to -J and K to -I. I need to get that serial port working and dust off the Perl coding skills, that would definitely make this easier.
I think my next machine should have X+ going away from the operator and Y+ going away from the column, then XY plane and XZ plane would machine the same.
