> For the complete documentation index, see [llms.txt](https://ms-kb.msd.unimelb.edu.au/msd-robotics-lab/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ms-kb.msd.unimelb.edu.au/msd-robotics-lab/prepare-for-printing/understanding-the-grasshopper-script.md).
# Understanding the Grasshopper Script
The Grasshopper script allows you to program the Robot and convert geometry from Rhino into toolpath geometry. Step through the following guide in order to program the Robot correctly.
**Functions of the Script**
The script has been colour coded to categorise the function of each component with the overall process.
**Name your file**
Keep your naming convention simple. Avoid any special characters or long names, as this file name is what will be visible in the Robot interface. Start your name with a **letter** to avoid a Robot error. \
\
\&#xNAN;*For example:* Nigel\_test\_01.
The left-hand side of each group outlines the function of the corresponding function
**Robot Parameters - Connecting to the Robot**
Ensure you have connected to the **Unimelb - IRB1200** for the **Large Extruder.**\
Alternatively, if you are using the Small Extruder you will need to connect to the Unimelb - IRB120.
**Converting objects to toolpath geometry**
Depending on the type of geometry, the script requires an input of either a series of curves or a solid geometry which it will translate into toolpaths.
If you have a series of **multiple polylines or curves** which make up your geometry, you will need to select your curves in **sequential order of printing** before you **\[right-click]** and select **\[Crv]**. The script
**Print preview:** Using the functions in the **Simulation and Prin**t panel, slide the simulation bar in the script to ensure the robot toolpaths have been generated correctly.