CNC Prepare

CNC Prepare

Win32 and 64, English

Formation of a closed polyline for CNC-milling: outside contours, dadoes, grooves, pockets, cutouts... Contours for milling approach in the inside corners. Approximation splines with a given tolerance

General Usage Instructions

A detailed description of the work of each team you can find on my website


Ribbon/Toolbar Icon Command Command Description


Prepare contours for CNC and apply annotations. Work with solids visible through the viewport


InsideCorner - Contours for milling approach into the inside corners


OutsideLoop – Joins segments to a closed polyline


FlatShot - generate contours from Solid. Project on XY Plane


DadoLoop – Formation of a closed polyline for CNC-milling dadoes


The installer that ran when you downloaded this app/plug-in from Autodesk App Store will start installing the app/plug-in. OR, simply double-click the downloaded installer to install the app/plugin. You may need to restart the Autodesk product to activate the app/plug-in. To uninstall this plug-in, exit the Autodesk product if you are currently running it, simply rerun the installer, and select the "Uninstall" button. OR, click Control Panel > Programs > Programs and Features (Windows 7/8/8.1/10) and uninstall as you would any other application from your system. 

Please read FAQ if any problem.

Additional Information

Known Issues

  • DDL - It is impossible to close the contour of the dado with branches and intersections. The program receives an input of not more than 2 circuits, and each branch is isolated by new contours. You can split the branched dadoes on a few simple steps and easy bridge it in the right place. And wait for the NCP command that may solve this problem.

  • OSL - Puts all the circuits inside the detail on NC_Inside layer. But this is not always true. Can be lug (protrusion) inside pocket on items. And they have to be milled outside. The program cannot understand for flat images. Be careful and wait for the NCP command that may solve this problem.

  • The program can leave small bits of arcs added to the contours of unneeded circle and commit other errors if you properly configure the tolerance. Be careful when changing the parameters of accuracy. Return to the default settings if you notice oddities.


Company Name: A>V>C>
Support Contact:

Author/Company Information


Support Information

Please write your questions and concerns in comments to the program on this site. I will reply as soon as possible.

I'll be glad to hear from you any suggestions and comments to further improve program.

Follow my news on Google+ or Facebook or Twitter and load new version here

The development of these plugins for s of Autodesk® AutoCAD® by professional programmer Sergey Donskov.

Version History

Version Number Version Description


AutoCAD 2019 ready Fixed FLT MText rotation error New version of FLT command Unitless drawings are recognized as Inch drawings if a fractional length format is specified. Fixed DDL bug - in Other contours the depth was erased and the pocket were not recognized. Fixed IC error - the contour shifted to 0 coordinates. Fixed OSL error - crash on splines projected in a line. Fixed a bug in the command Outside Loop (OSL) - an error of projection of polylines and splines in some coordinate systems UCS


Updated for 2019


Compatible with Autodesk® AutoCAD® 2018.


First public version.
Go top