You need now to design a nice "clock platter". 

The disk geometry is directly influencing this design.
You need to make a precise plan of the disk, axis positions, head arm lenght... and to report all this into a CAD software. here is my design for my old samsung disk.

Here is the dxf file for this drawing

A have tested several ways to transfer this drawing on the disk.:

• toner transfer method with a laminator and a laser printer ( toner transfer). Result is clean but very fragile and there is a lack of accuracy when positionning the drawing on the platter. (see picture on top of the project page).
• V shape engraving with my CNC mill. Result is almost perfect even though signs are a little too wide...Here is the GCode engraving file

this video has been accelerated (High speed milling)