> For the complete documentation index, see [llms.txt](https://docs.andymark.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.andymark.com/robits-build/getting-started/the-robits-grid.md). # The Robits Grid ## Understanding and Using the Robits Grid The Robits building system is designed around a standardized 1/2-inch grid. This grid provides a consistent way to position structural components, mechanisms, and motion components without requiring extensive measuring or custom fabrication. The grid is one of the features that makes Robits a great system for rapid iteration and experimentation. Every hole along the horizontal and vertical axis align. Instead of designing each connection from scratch, builders can select components that share the grid pattern and assemble them using standard hardware. ## The 1/2-Inch Grid Robits extrusion uses clearance holes for 10-32 screws spaced every ½ inch. These holes establish the primary Robits grid and provide mounting locations for gussets, plates, gears, shafts, standoffs, and other components. Each hole represents a ½ inch increment. Robits also uses components with finer resolution, including washers for spacing and gussets with slots for alignment. This allows builders to make smaller adjustments for parts that may need tensioning or precise placement while maintaining compatibility with the overall grid system. ## Designing on the Grid When designing with Robits, start by thinking in terms of grid positions rather than individual measurements. For example, if a mounting point needs to move 1 inch, it can be moved by two grid increments. A 2 inch adjustment corresponds to four increments. This makes it easy to experiment with different positions during prototyping.

These 3 plates represent 2 grid holes (1 inch), 4 grid holes (2 inches), and 8 grid holes (4 inches). The build process usually starts by choosing a basic structural member that will form the foundation of the mechanism. Next, determine where the mechanism needs to attach, pivot, or be supported. Experiment with how to get the pieces to accomplish the task you need to do. Next, select grid compatible components, using gussets, plates, beams, standoffs, or carriers that provide mounting points at the required locations, then attach these components using 10-32 hardware. Finally, adjust what you've made to fit the task. This approach allows teams to iterate quickly while keeping the majority of the robot aligned to a common reference system. ## Robits Grid Design Principles When designing with Robits, keep the following principles in mind: * Design around the grid whenever possible * Use gussets to create rigid, repeatable joints * Use spacers for fine adjustments The [Robits Core Kit](https://andymark.com/products/robits-core-kit) is specifically intended to support this style of iterative construction. It includes a variety of tube lengths, beams, gussets, plates, carriers, shafts, gears, pulleys, belts, wheels, spacers, and standardized hardware, giving teams the components needed to experiment with many different robot configurations.