I'm in the process of calibrating my lathe and I've needed to create these templates to understand where the limits are to program in.
I leveraged AI and python to write the script, alter to suit if you need, although you should not need to, as this is based on the 1964 RIAA standard.
The circles from outer to inner on all sizes represent:
The outer diameter, first modulated groove, inner most modulated groove, locked groove, label area, spindle circle (there is probably a better term for this last one).
You can alter the bottom of the script if you are after different diameters.
RonnieD
p.s.
The form doesn't allow python files. I've renamed it as a text file. If you want to run the python file, you need to rename it to: "record_circles.py"
If you do want custom sizes and you're having issues with the script, just send me the sizes and I can do it quickly.
