outline - Indicates outline/through cut (Example: outline z#p#). Can be constructed with lines and arcs (Note: light weight polylines should work although polylines are not supported at this time. If saving DXF file from AutoCAD, select version 13, to save polylines as light weight type).
board - Is equivalent to an outline layer name.
panel - Is equivalent to an outline layer name.
border - Is equivalent to an outline layer name.
pocket - Indicates pocket cut (Example: pocket z#p# d#p#). If a tool diameter (d#p#) is not specified then the diameter set in Pocket Settings will be obeyed. All Lines and Arcs on this layer identify the outer boundary of a pocket.
dado - Indicates dado cut (Example: dado z#p#). This layer is constructed of (4) connecting, straight lines.
back - Indicates back operation for dado, chain, pocket, or drill (Example of back drill operation: backdrill z#p#). Z or depth values are defined from primary side, top of material.
drill - Indicates drill operation (drill z#p#). Geometry on drill layers must be constructed as complete circles. If the holes can be drilled with the drill bank Control Nesting will recognize.
bore - Is equal to drill layer.
hbore - Operation is ignored.
centerline - Cut indicating where the centerline of tooling will travel (Example: centerline z#p# d#p#). Layer must be constructed from lines and arcs.
chain - This layer has been added to give the user the ability to manually nest parts in the dxf file and control which direction the tool compensates based on the geometry. Also provides another tool to create toolpaths on interior geometry. Chain compin will compensate to the inside of the geometry and chain compout will compensate to the outside based on the tool diameter specified. (Example: chain compout z#p# d#p#).
start - Enables operator/programmer to specify a start point for chain type geometry that has been created within a DXF file (ie: entities saved on level/layer named: chaincompin/out, centerline or outline). To specify starting point for a particular design, you must take the one entity you wish to start on and save it to a level/layer of it’s own. That level/layer name will then need to be same as chain type geometry that remaining entities reside on, but must also contain the character set "start" at the end (ie: outline z#p# start ).