Your design rules, turned into verified production systems.
Software that takes the rules your designers already apply by hand and produces models, drawings, cut files and BOMs — checked against independent software, repeatable to the byte, and handed over with source, tests and documentation.
Fixed-fee assessment first. You keep the source, the tests and the documentation.
Built for
- Fabrication & equipment manufacturing
- Sheet metal & enclosures
- Process & material-handling equipment
- Configurable industrial products
The same job, rebuilt by hand, every order.
The pattern is almost always the same: something correct is being redone slowly, with room for error, by the one person who knows how.
Save-as engineering A rule set your designers own
Copying the last job and editing it works until the variant is slightly different. The rules get captured once — documented, tested, versioned.
Spreadsheet sizing A calculation tool with a verification record
The sizing sheet everyone trusts and nobody can audit becomes software with stated assumptions, test cases and an independent check.
Drawings, DXF and BOM assembled by hand Generated from one parameter set
Models, drawing sets, cut files and BOM data produced together, so they cannot disagree with each other.
Quoting that waits on engineering Preliminary drawings and BOM in minutes
Sales gets a checkable package early; engineering finishes the real one without starting over.
Demonstrations you can download, verification you can read.
Self-owned demonstrations, written the same way a client project would be: problem, constraints, engineering logic, system, validation, result. Nothing here is invented.
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 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 exported file audited by an independent DXF library; hand-derived golden cases; accepted in real CAD.
Read the case study →An Autodesk Inventor add-in that turns a hopper configuration into a verified release package
A parametric rectangular-transition-hopper generator for Autodesk Inventor 2026: eleven inputs become part models, an assembly, drawings, flat-pattern DXF, PDF and a bill of materials — then the package is validated and refused if any check fails.
Result 64 engine rules across eight families, with a second implementation that agrees on all seven reference sizes; flat patterns read back within the 2.5% validation gate (about 1.2% on the nominal hopper); 111 automated tests pass and every release carries a SHA-256 manifest.
Read the case study →Manufacturing geometry deserves stricter engineering than marketing software.
A wrong dimension in a generated file becomes wasted plate and machine time. That sets the standard for how these systems are built and checked.
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Requirements and acceptance cases first
Past orders with known-good outputs become the test suite before any code exists.
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Domain logic separated from the interface
The same rules can drive an Inventor add-in, a batch generator or a browser tool without being rewritten.
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Verified three ways
Hand-derived golden cases, geometric invariants, and read-back with software that had no part in writing the file.
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Assumptions stated, not buried
Every tool says what it does not account for. K-factors, springback and seam rules stay yours.
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Handed over, not held hostage
Source, tests, rules documentation, user guide, training. Your designers can change a rule without calling anyone.
Start with one repeating job.
Every engagement begins with one concrete example of the job you keep repeating. Where it goes from there depends on how much of the workflow is worth automating.
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One repeating task, examined end to end. Process map, rules inventory, feasibility, ROI estimate and a fixed quote for what comes next.
fixed fee 1–2 weeks
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One generator for one job: parameters in, models, drawings, cut files and BOM out — tested against your own past orders.
fixed scope 3–8 weeks
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Configuration, drawings, BOM and ERP data connected into one verified flow, with a rule library your team owns.
milestones 2–5 months
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Support & Improvement
Rules change; the regression suite stays green. A monthly allocation of hours.
retainer ongoing
Scope is quoted before work starts. Engineering decisions stay with the responsible engineer on your side — see Approach.
Fabrication drawings, flat patterns and DXF — generated, not drafted.
Six calculators for the developments a shop redraws most often, running the same geometry core as the custom work. Free, no account, DXF generated in your browser.
Cone / Frustum Configurator
Flat pattern with inside/outside dimension basis, plate-roll or press-brake forming, bend angles and out-of-round — plus a clean DXF.
Open the tool →Hopper & Transition Builder
Develop a rectangular hopper or duct transition into four flat panels — centred or offset — with exact developed geometry and a DXF per panel.
Open the tool →Pipe Cut Template Builder
Wrap-around templates for angled pipe ends and pipe-to-pipe saddles, with the export deviation stated rather than assumed.
Open the tool →Sheet Metal Profile Builder
Build a multi-bend open profile from segments and bends. Live formed section, live flat pattern, and a DXF blank with a directed centreline per bend.
Open the tool →One person, both disciplines
Ruthen Systems is run by Mykola Hera, from Canada, working remotely with manufacturers across the country. CAD and fabrication practice on one side, software discipline on the other — and the verification habits of someone who has seen a wrong flat pattern reach a laser.
Have a job worth automating?
Send one example — a drawing, a spreadsheet, or a plain description of what you keep redoing. You will get a direct answer on whether it is worth automating, including when the answer is no.