🚀 go-pugleaf

 lots of talk about encoders, here is one I used  written in postscript.


I wrote a simple postscript
program to create a 100 line disk. 

%Change to inches
72 72 scale
%setup a new line moving to center of page
newpath .03 setlinewidth 4.25 5.5 translate
%define number of lines
/lines 100 def
%Angle increment
/angleincr 360 lines div def
lines { 0 2 moveto 0 -2 lineto stroke
    angleincr rotate
} repeat
%draw white circle in center
newpath
.01 setlinewidth
0 0 .25 0 360 arc 1 setgray stroke
%eject page
showpage
%all done

I put this paper disk on a piece of 1/16" styrene.  The disk was glued
to the wheel using the silicone bathtub sealer.  Centering isn't
terribly critical, but I have a circle indicating where to cut the
hole for the axle.