Note a few refernce dimensions
Load picture into vector program ( cad ,inkscape whatever)
scale until the pic matches your reference measurements
manualy trace over
send dxf to sheet cam( or what ever you use for g code)
I use this method on small stuff pretty well |
I second this method
One thing you must do is take the overall dimensions of the original in both X & Y, and then scale the tracing in both X & Y directions.
If the bitmap is a good resolution it is surprising how accurate this method can be!
Andy