Laser cut Center-finding Ruler
thingiverse
I saw somthing like this many years ago, and always wanted one. It's a ruler that allows you to easily find the midway point between two points. Started with a generated ruler, downloaded from http://robbbb.github.io/VectorRuler/?fbclid=IwAR1ajdM-8Za4I2TBvVJnhB-8U5gAGEYcFsyQusRNMAWVNTaDIiqM9N_YsuM To use it, simply measure with the top scale, and without moving it, mark the same numerical place on the bottom scale. Inkscape file is provided. I cut this one on a Chinese 60 Watt K40 machine. The logo on the picture is because I made this one for a relative.
With this file you will be able to print Laser cut Center-finding Ruler with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Laser cut Center-finding Ruler.