> For the complete documentation index, see [llms.txt](https://rda-workshop.gitbook.io/1/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://rda-workshop.gitbook.io/1/cnc-routing/guidelines-for-cnc-site-models.md).

# Guidelines for CNC site models

* The landscape should be designed with building pads where the buildings over 25 mm should be fabricated seperately. The tool diameter is 6 mm, so the spacing between buildings and for details should be minimum 6.1 mm.

<figure><img src="/files/vWY0gqTZn8wZk5Bn1Vm8" alt=""><figcaption></figcaption></figure>

* Your 3D model must be a **closed solid** – not just a surface. It needs **side walls, a bottom, and closed curves**, like in the example below.
* Export the landscape as a **.stp file** if possible. If your software can’t export .stp, a **.stl file** also works, though it can sometimes cause issues.
* The **maximum material thickness is 40 mm** in 1 layer, but upon request 2 layers 80 mm is possible.

<figure><img src="/files/btWmEKDZfI6DyNYn3KzP" alt=""><figcaption></figcaption></figure>

* When you’re ready, **model the stock** (your material block) around the landscape.\
  Make it about **30 mm larger** on all sides – this gives space for screws to hold the material in place. It should look like the example below.

<figure><img src="/files/K6lPodTH0up6NpuuB6SG" alt=""><figcaption></figcaption></figure>

* We sell **pre-glued pine sheets** up to **1500 × 1000 × 40 mm**.\
  The price is **0.067 DKK per cm²** – for example, a 50 × 40 cm piece costs about **135 DKK**.
* **Machining cost:**

  * 10 DKK/hour on the Roland CNC
  * 20 DKK/hour on the VHF CNC

  A typical landscape model takes **3–6 hours**, depending on detail level.
* When your file is ready, **send your project request to Emil** at **<ejas@kglakademi.dk>**.