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ComfyUI: Building a K Sampler and Checkpoint Node Setup

ComfyUITry it →Watch full video →Fictitiousness ·

Demo summary

The creator demonstrates starting a blank workflow and connecting a K Sampler node to a Load Checkpoint node using the node-based drag-and-drop interface.

Step-by-step

  1. Create a blank workflow by clicking the plus icon in the main menu
  2. Double-click anywhere on the empty canvas to open the quick search bar
  3. Type 'K sampler' in the search bar and select it from the list
  4. Click and drag from an input connection point on the left of the K sampler node into empty space
  5. Select 'Load Checkpoint' from the filtered pop-up menu to create and connect the node
  6. Click the dropdown menu on the Load Checkpoint node to select your downloaded model

Options

  • Search for nodes via the quick search bar
  • Connect nodes by dragging from connection points to open a filtered compatible node list

Watch out for

  • Workflows must flow from left to right (inputs on the left, outputs on the right)
  • Incompatible data types cannot be connected (e.g., yellow CLIP outputs cannot connect to orange inputs)
  • You must have a model downloaded and installed to select it in the Load Checkpoint node

Tips

  • Use the color-coding on connection points to identify compatible nodes (e.g., Lavender for models)
  • Think of nodes like programming functions that perform specific jobs in a sequence

Highlights

“making it simple to spot which nodes can connect”

All demos from “ComfyUI for Beginners Pt. 1: Installation, Interface & Your First SDXL Workflow”

  1. 4:071:10Install ComfyUI and Manager with Stability MatrixThe video demonstrates how to use the Stability Matrix launcher to install ComfyUI in portable mode and add the ComfyUI Manager extension via the package menu.ComfyUIAI Image Generator
  2. 6:504:15ComfyUI Interface and Sidebar NavigationA walkthrough of the ComfyUI interface, including the main menu, Q panel for tracking generations, model library, and the canvas tools for node navigation.ComfyUIAI Image Generator
  3. 11:472:24Building a K Sampler and Checkpoint Node SetupCurrentThe creator demonstrates starting a blank workflow and connecting a K Sampler node to a Load Checkpoint node using the node-based drag-and-drop interface.ComfyUIAI Image Generator
  4. 14:130:45Download SDXL Models via Stability Matrix BrowserThe demo shows how to use the built-in CivitAI integration in Stability Matrix to browse, filter for SDXL 1.0 checkpoints, and download them directly to the shared models folder.Stability AIAI Image Generator
  5. 16:374:03Completing a Text-to-Image Workflow in ComfyUIThe video shows the step-by-step connection of CLIP Text Encode nodes for prompts, Empty Latent Image for resolution, VAE Decode, and the Save Image node to complete a functional pipeline.ComfyUIAI Image Generator
  6. 21:100:42Running an AI Image GenerationThe user enters a prompt and clicks 'Run', demonstrating how ComfyUI highlights active nodes with a green border as it processes the image through the pipeline.ComfyUIAI Image Generator
  7. 21:523:43Adjusting K Sampler ParametersA walkthrough of the K Sampler settings including Seed, Steps, CFG scale, and Sampler/Scheduler selection to control the final image output.ComfyUIAI Image Generator
  8. Watch “ComfyUI for Beginners Pt. 1: Installation, Interface & Your First SDXL Workflow” →

AI Image Generator

  1. 8:418:40Building a ComfyUI workflow from scratchA step-by-step walkthrough of adding nodes (Checkpoint, CLIP Text Encode, KSampler, VAE Decode) and connecting them to build a custom image generation pipeline.AI Search
  2. 19:571:09Generating a medieval warrior with batch processingDemonstrates generating multiple images of a medieval warrior by increasing the batch size in the Empty Latent Image node.AI Search
  3. 25:330:32Importing workflows from image metadataShows how to drag an existing AI-generated image into the ComfyUI canvas to automatically reconstruct the entire node workflow used to create it.AI Search
  4. 58:094:05Controlling character poses with ControlNetDemonstrates using the OpenPose pre-processor and ControlNet Union model to force a generated princess character into a specific pose from a reference image.AI Search
  5. 1:360:57Install custom workflows and missing nodes in ComfyUIThe video demonstrates how to drag and drop a JSON workflow file into ComfyUI and use the Manager to identify and install missing custom nodes.Sebastian Kamph
  6. 3:020:20Search and install models via Model ManagerA walkthrough of using the ComfyUI Model Manager to search for specific AI models, such as ControlNet, and install them directly.Sebastian Kamph
  7. 3:281:10Running and managing image generation queuesDemonstration of starting a workflow using the 'Run' button, setting up 'Run Instant' for continuous generation, and using 'Run on Change' to trigger generation upon prompt edits.Sebastian Kamph
  8. 4:590:55Navigating the ComfyUI workspace and UI settingsShows how to use zoom, fit view, pan modes, and toggle link visibility or themes (light/dark mode) within the ComfyUI interface.Sebastian Kamph
  9. 11:311:49Adding and connecting nodes in ComfyUIThe video demonstrates adding a 'Load Image' node via the library or right-click menu and connecting it to other nodes like 'Save Image' using spaghetti links.Sebastian Kamph
  10. 19:431:34Converting widgets to inputs in ComfyUIShows how to convert a node's internal settings (like seed) into an external input pin and connect a 'Primitive' node to control it.Sebastian Kamph
  11. 25:032:06Managing seeds and randomizationShows the difference between 'Randomize' and 'Fixed' seed settings in the KSampler to either generate new variations or reproduce the same image.Sebastian Kamph
  12. 36:450:34Saving images to specific foldersShows how to use the 'Save Image' node and file path syntax to organize output images into custom subfolders.Sebastian Kamph
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