ShopBot Tools contributed its CNC instruction syntax and supporting documentation to the public domain under the name OpenSBP. OpenSBP is a text format for describing toolpaths and machine instructions—not a design language that builds toolpaths directly into 3D models or a complete digital-fabrication software stack.
What happened when ShopBot opened its code?
On April 13, 2009, Make: reported that ShopBot had opened its CNC control code under the name OpenSBP. The report quoted the newly launched OpenSBP site, which described the format as a standard for toolpath and instruction code used to control CNC machines and digital-fabrication tools. Make:’s 2009 report records the announcement.
The OpenSBP project overview attributes the format to ShopBot Tools, Inc., where it was originally developed for ShopBot CNC routers. The site says ShopBot contributed the syntax, full documentation, and support resources to the public domain, and invites its use with CNC and digital-fabrication systems.
What is OpenSBP?
OpenSBP is a sequential, human-readable text-command format that tells a digital tool how to move and operate. Its files use the .sbp extension. Commands use two-letter mnemonics, followed where needed by ordered parameters separated by commas. For example, the project documentation identifies M3 as a three-axis movement and MZ as a Z-axis move; it also describes M3 and M5 vectors and CG arcs and circles as primary toolpath commands. OpenSBP also documents BASIC-like programming extensions.
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That makes OpenSBP machine-level instruction code: it describes movements and other actions for equipment to execute. The project explicitly says it is not meant to be the higher-level language integrated with 3D models that some envision as a longer-term goal. Its stated purpose is a practical syntax for current tools.
How does OpenSBP compare with G-code?
OpenSBP’s project site positions the format as more flexible and extensible than legacy G-code and says its human-readable syntax can be implemented by different controllers. Those are the project’s stated goals and comparison, not independently measured performance findings. The site says ShopBot routers can read both G-code and OpenSBP, and presents OpenSBP as most useful when users are not tied to G-code for legacy reasons.
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| Consideration | OpenSBP | G-code |
|---|---|---|
| Purpose | A text syntax for toolpath and machine instructions, developed by ShopBot for its CNC routers. | A legacy CNC instruction format; the OpenSBP site discusses it as an alternative but does not provide a broader history or specification comparison. |
| Command readability | Uses two-letter mnemonics with ordered, comma-separated parameters; files use .sbp. |
The OpenSBP site does not give enough detail in its comparison to assess G-code readability command by command. |
| Controller implementation | The project aims for a syntax that different controllers can implement. ShopBot routers are stated to read OpenSBP. | The project says ShopBot routers also read G-code; compatibility elsewhere is not established by the cited overview. |
| Extensibility | The project describes BASIC-like programming extensions and calls the format more flexible and extensible than legacy G-code. | No comparable extension details or independent evaluation are provided on the project overview. |
| Legacy compatibility | Presented by the project as useful where users are not bound to G-code by legacy requirements. | May matter where an existing workflow or equipment depends on G-code; the project does not quantify how common that situation is. |
Who was associated with OpenSBP?
The project site describes its group as CNC software companies, CNC tool manufacturers, and users. Its listed participants include ArtCAM/Delcam, Cabinet Parts Pro, CNC Software/Mastercam, MecSoft, SA International, ShopBot, VectorArt3D, and Vectric. That is the roster named on the site; it does not establish that each organization remains an active participant or that every current product supports OpenSBP.
What does “open” mean here?
The OpenSBP site says the syntax and accompanying documentation and support resources were contributed to the public domain and are freely available for CNC and digital-fabrication uses. This describes the availability of the format and its resources; it does not, by itself, mean that a particular machine, controller, or design application supports OpenSBP. Compatibility depends on the software and equipment in a given workflow.
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What is known—and not known—about its impact?
The 2009 Make: report and the OpenSBP overview explain the contribution and the format’s intended role, but provide no attributable adoption figures, performance statistics, or named quantitative study. They therefore support describing what ShopBot opened and what OpenSBP is designed to do, not claims about its speed, market share, or how widely it is used today.
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