# Velleman K8400 Vertex Configuration Source: [velleman.eu](https://www.velleman.eu/products/view/?id=417866) Configuration files for the K8400, ported upstream from the official Velleman firmware. Like its predecessor, (K8200), the K8400 is a 3Drag clone. There are some minor differences, documented in `pins_K8400.h`. Single- and dual-head configurations provided. Copy the correct `Configuration.h` and `Configuration_adv.h` to the `/src/config` directory. > [!NOTE] > This configuration includes the community sourced feed rate fix. Use 100% feed rate in Repetier! ### Original Sources Upstreamed from: [birkett/Vertex-K8400-Firmware on GitHub](https://github.com/birkett/Vertex-K8400-Firmware) Credit to Velleman for the original Marlin 1.0.x based code: - [Download Vertex M1 1.4-H1](https://cdn.velleman.eu/downloads/files/vertex/firmware/vertex-m1-v1.4-h1.zip) - [Download Vertex M1 1.4-H2](https://cdn.velleman.eu/downloads/files/vertex/firmware/vertex-m1-v1.4-h2.zip)