"PCB Isolation"? What is that?

Basically its macro that converts a printed circuit board (PCB) image into outlines that can be used by a CNC machine to make a copy of the board. As it only traces the outline of the PCB tracks (i.e. it does not remove all the copper) so its called an "Isolation".


Why not use an online 'Image to Vector' program?

Yes, they do a respectable job. Nicely smoothed but lots of points.
Really, writing the macro was just for fun!

Okay, how to use:
 1 Convert your PCB image into a 24 bit uncompressed BMP.
 2 Try an get it as Black and White as possible using an image processing software.
 3 Put the macro in a directory (where you an find it).
   (the macro file manager will allow you to navigate anywhere to find your BMP)
 4 Run the macro (my is call BMP2DC.BAS).
 5 The BMP File Viewer will appear:
   A Select a BMP file (a preview will appear).
   B Press Okay
 6 Depending on the BMP file size, after a few seconds another menu will appear:
    A Select your options (note: the pixel spacing is in mm per pixel and is used to scale the output to DeltaCad).
    B Press Okay
 7  6 Depending on the PCB complexity after a few minutes the macro will update the screen with the result.

The macro uses shapes (Blue for clockwise (or an outside edge) and Red for anti-clockwise (or an inside edge)).
If black outline may appears then number of segments is too high (>3072) for a shape.
A black box presents the image limits.
Note: All outlines are closed, to do this a one pixel border has been imposed/cleared (i.e. don't have anything  on the border).