--- title: "Configuring a Ruida Controller: A Step-by-Step Guide" description: Learn how to configure a Ruida controller for optimal laser performance. This guide covers homing, step length calibration, and vendor settings in LightBurn. --- [Skip to content](https://support.salasers.com/configuring-ruida-controller#main-content) English Show submenu for translations [Submit a Ticket](https://support.salasers.com/kb-tickets/new?hsLang=en) ![MicrosoftTeams-image.png\]](https://support.salasers.com/hs-fs/hubfs/Logos/MicrosoftTeams-image.png?height=50&name=MicrosoftTeams-image.png) Open main navigation Close main navigation - English Show submenu for translations - [Submit a Ticket](https://support.salasers.com/kb-tickets/new) - Go to salasers.com Go to salasers.com Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [SA Laser Knowledge Base](https://support.salasers.com/?hsLang=en) 2. [How-To Guides](https://support.salasers.com/how-to-guides?hsLang=en) # Configuring a Ruida Controller: A Step-by-Step Guide ## Overview Configuring a Ruida Controller When resetting or installing a Ruida controller, understanding its configuration is essential for ensuring optimal laser performance. A factory reset reverts the controller to Ruida’s stock settings, not the custom settings applied by your laser’s manufacturer. This guide will walk you through configuring your Ruida controller after a reset or when installing a new controller. --- #### Back Up Your Settings Before making changes, back up your existing configuration: 1. Go to **Edit** → **Machine Settings** in LightBurn. 2. Click **Save to File** to back up your settings. This ensures you can revert to previous settings if needed. --- #### Understanding Machine Settings In LightBurn, the Machine Settings window is divided into two sections: - **User Settings**: Configurations that users can adjust as necessary. ![Ref-MachineSettings](https://support.salasers.com/hs-fs/hubfs/Ref-MachineSettings.png?width=384&height=806&name=Ref-MachineSettings.png) - **Vendor Settings**: Factory settings specific to the machine. Modify these only when necessary. To access Vendor Settings, expand the section and acknowledge the warning prompt. ![Guide-ConfigureRuidaController-VendorSettings](https://support.salasers.com/hs-fs/hubfs/Guide-ConfigureRuidaController-VendorSettings.png?width=371&height=932&name=Guide-ConfigureRuidaController-VendorSettings.png) --- #### Homing, Directions, and Travel A Ruida controller uses homing switches to identify axis limits. Follow these steps to ensure proper axis behavior: ### Step 1: Correct Direction of Travel 1. Power on the laser. 2. Observe the movement towards the X and Y limit switches. If movement is incorrect, press **ESC** to stop. 3. Adjust the following settings under Vendor Settings for each axis: - **Limiter Polarity**: Determines if the limit switch triggers high (normally open) or low (normally closed). - **Direction Polarity**: Controls the motor’s movement direction. Experiment with combinations until the axis moves correctly and recognizes the homing switch. ### Step 2: Correct Keypad Controls Ensure the keypad arrows move the laser in the correct direction. If they don’t, toggle **Invert Keypad Direction** for the affected axis. ### Step 3: Set Max Travel Set the maximum travel distance for the X and Y axes to match your machine’s work area. --- #### Step Length Calibration Step length calibration ensures the laser moves the correct distance per step: ### Rough Calibration 1. Set **Start From** to **Absolute Coords** in the Laser Window. 2. Draw a small rectangle (e.g., 10 x 10 mm) at the origin. ![Guide-ConfigureRuidaController-DrawSmallRect](https://support.salasers.com/hs-fs/hubfs/Guide-ConfigureRuidaController-DrawSmallRect.png?width=106&height=88&name=Guide-ConfigureRuidaController-DrawSmallRect.png) 3. Use the **Frame** button and compare the movement to the rectangle’s size. 4. Adjust the **Step Length** in Vendor Settings: - If the laser moves twice as far, double the step length. - If it moves half as far, halve the step length. Repeat until the movement matches the rectangle’s size. ### Final Calibration 1. Draw a larger rectangle (e.g., 100 x 100 mm). 2. Run the job and measure the engraved rectangle. 3. Calculate the new step size: **New Step Size = (Current Step Size \* Measured Length) / Requested Length** 4. Adjust settings and repeat until measurements are precise. --- #### Fixing Skewed Engravings If engravings are skewed, adjust the **PWM Rising Edge Valid** setting for each axis. Toggle this setting (enable/disable) to align engravings correctly. ### ![Guide-ConfigureRuidaController-SkewedEngraving](https://support.salasers.com/hs-fs/hubfs/Guide-ConfigureRuidaController-SkewedEngraving.jpg?width=375&height=500&name=Guide-ConfigureRuidaController-SkewedEngraving.jpg) ### Why PWM Rising Edge Matters This setting ensures the controller and motor driver synchronize their step signals. Misalignment can cause directional errors, resulting in skewed engravings. --- #### Start and End Delays Use start and end delays to: - Allow fans to reach full speed before engraving starts. - Ensure proper ventilation after a job completes. --- By following these steps, you can configure your Ruida controller effectively, ensuring your laser operates accurately and efficiently. - [Lightburn](https://support.salasers.com/lightburn?hsLang=en#main-content) - [Lightburn For Galvo (Fiber)](https://support.salasers.com/lightburn?hsLang=en#lightburn-for-galvo-fiber) - [Lightburn For Gantry (Co2,RF)](https://support.salasers.com/lightburn?hsLang=en#lightburn-for-gantry-co2rf) - [Fiber (Galvo) Lasers](https://support.salasers.com/fiber-galvo-lasers?hsLang=en#main-content) - [Troubleshooting](https://support.salasers.com/fiber-galvo-lasers?hsLang=en#troubleshooting) - [Co2 Lasers](https://support.salasers.com/co2-lasers?hsLang=en#main-content) - [Razor Series](https://support.salasers.com/co2-lasers?hsLang=en#razor-series) - [Troubleshooting](https://support.salasers.com/troubleshooting?hsLang=en) - [EzCad 2](https://support.salasers.com/ezcad-2?hsLang=en) - [How-To Guides](https://support.salasers.com/how-to-guides?hsLang=en) - [Explainers](https://support.salasers.com/explainers?hsLang=en) - [Tools & Features](https://support.salasers.com/tools-features?hsLang=en#main-content) - [User Interface](https://support.salasers.com/tools-features?hsLang=en#user-interface) - [Essential Functions](https://support.salasers.com/tools-features?hsLang=en#essential-functions) - [Layout and Design](https://support.salasers.com/tools-features?hsLang=en#layout-and-design) # San Antonio Laser SALasers.com Help Center Copyright © 2026, San Antonio Laser