Sunday, March 4, 2012

Top molding

The solution for the topmolding was to make 17 parallel cuts in different depths with a 0.1mm 10degree V-cutter.

I have applied a single coat of laquer because then it is easier to justify the result.

Another solution could have been using different cutters as with the original but my smallest round nose cutter is 1mm in diameter and the molding is 1.6mm across.

Below is the cutting steps for the original molding.

Screenshot of cad-program with a lot of parallel lines. Every line is placed in its own layer in the drawing because they will be cut in different depths. The drawing has been rotated to match major grain direction of the wood that later will be cut out.
And screenshot of molding profile.
The red line is the molding profile made by tracing a scan of the original drawing and then resized down to 1:48 scale, the yellow is the parallels and the blue represents the v-cutter.
From the drawing the cutting depths is measured and later used in another program that generates the codes for the cnc-machine.

Photo of V-cutter.
The tip is 0.1mm and the V-angle is 10-degrees.
Pro: V-cutters are cheap. (A 0.1mm standard cutter costs 40-80USD and breaks when you think about using them.)
Cons: The V-shape of the cut.

Have fun


  1. Hi, Nice post. Would you please consider adding a link to my website on your page. Please email me.


    Joel Houston

  2. I am rather intrigued with a new cnc cutter system from Amana Tools and will order it sometime this spring. It would allow changing profile shapes with the tool holder still in the chuck. If the length of the cutters is the same on the various available profiles it would certainly be a time saver on setup. It is also possible to order custom profiles in a minimum quantity of 10.

    I already have a set of miniature router bits made for creating dollhouses from Amana Tools and the quality of those 1/4 carbide bits is beyond belief. I suspect this tool system will also be just as good.

  3. Those cutters from Amana Tools is too big for my use.

    A standard milling cutter of 0.1mm (very expensive) cuts 0.1mm when lovered into the material. A 30degre cutter from Amana cuts a width of 0.65mm when lowered 1mm into the material, and the cutters I use with 10degrees angle only cuts 0.27 mm when cutting 1mm deep.

    I have automatic tool-change and tool-length measurement so changing cutters is not a problem.