Work
Self-owned projects behind the tools, written up in full: problem, constraints, logic, system, validation, result. Nothing here is invented.
Published work
Fabrication Generator: cones, cylinders and clamps with a second implementation that checks the first
A portable Windows application that produces cutting DXF, real DWG drawings, PDF and a job record for rolled and press-brake parts — and refuses to invent the numbers it cannot know.
Result 1,078 checks across four independent methods; one datum difference with common calculators found and documented rather than hidden.
Read the case study →A fabrication geometry core and its first six public tools, verified three ways
The engine behind the free tools on this site: developments for cones, hoppers, profiles, bends, bolt circles and pipe cuts, exported as deterministic DXF and checked by software that had no part in writing it.
Result Every DXF fixture audited by an independent DXF library; hand-derived golden cases; preview and file drawn from one geometry.
Read the case study →What these are
Self-owned projects, built on Ruthen's own time and hardware with its own code and free or open-source libraries, from generic inputs. No employer or client drawing, number or file appears in any of them.
Use the tools built this way
Cones, hoppers, pipe templates, profiles, bends and bolt circles — free, in your browser, with the same verification behind them.