Hand-drawn mechanical
Parts, layouts and handwritten dimensions.
LEGACY DRAWINGS EDITABLE CAD
Turn old engineering drawings into editable CAD.
We help engineering teams convert paper, scans and hand-drawn records into reviewed 2D CAD assets they can use again.
A practical path from archive to usable geometry.
ORIGINAL SCANEDITABLE CAD VIEWSYNTHETIC / MP-204
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THE PROBLEM
Engineering knowledge is still stuck on paper.
A scanned drawing can preserve what was drawn. It does not give your team geometry they can easily edit, check or reuse.
- Old details are hard to find.
- Changes can mean drawing the same part again.
- Faded notes and dimensions need careful interpretation.
WHAT WE DIGITIZE
Start with the drawings you already have.
We assess the source, the required CAD output and the checks needed before conversion.
Scanned blueprints
Older drawings stored as image files or PDFs.
Plant drawings
Equipment and facility documentation.
Civil & infrastructure
Legacy layouts and technical plans.
Survey plans
Scanned survey drawings and annotations.
Technical records
Sheets with notes, labels and revisions.
Suitability depends on legibility, scale, completeness and the output you need.
HOW IT WORKS
From scan to reviewed CAD.
AI helps identify drawing information. Engineering checks turn it into a usable deliverable.
- 01
Review the source
Check scan quality, scale, units and missing details.
- 02
Understand the drawing
Separate geometry, dimensions, notes and title information.
- 03
Extract the geometry
Identify lines, arcs, holes and other drawing elements.
- 04
Build the CAD drawing
Reconstruct editable vector entities and annotations.
- 05
Validate the result
Check critical dimensions and flag unclear source information.
- 06
Deliver 2D CAD
Provide the agreed editable file and review notes.
SEE THE DIFFERENCE
The same drawing. Ready to work with.
The source is a picture of a drawing. A delivered CAD file can contain editable line, arc, dimension and annotation entities your engineering team can inspect; this illustration alone does not prove a conversion.
ORIGINAL SCANEDITABLE CAD VIEW
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The scan and CAD view show the same mounting plate in the same position. The CAD view contains distinct lines, arcs, holes, dimension marks and drawing annotations.
01 Rebuilt geometry
02 Readable dimensions
03 Review points remain visible
Synthetic mounting-plate example shown for illustration. The result represents the intended output; it is not a live conversion or customer deliverable. Actual output depends on the source drawing and engineering review.
WHY IT MATTERS
Make the archive useful again.
Each outcome is tied to an editable 2D CAD deliverable and the review agreed for your drawings.
Edit
Make changes to reconstructed CAD geometry.
Reuse
Bring old details into current engineering work.
Review
Trace uncertain details back to the original sheet.
Find
Organize archives with agreed names and captured drawing details.
POTENTIAL APPLICATIONS
Built for engineering archives.
Manufacturing
Revisit older parts and drawings when designs change.
Plant engineering
Bring facility drawings into an editable workflow.
Infrastructure & survey
Work from older plans and survey sheets.
EPC & consultants
Prepare legacy documentation for current projects.
These are potential applications; each archive needs a sample review.
WHERE WE ARE GOING
2D CAD is the starting point.
Today, we focus on turning old drawings into reviewed, editable 2D CAD. Over time, we aim to connect those drawings to structured engineering information and, where the source supports it, 3D models.
NOWReviewed 2D CADTODAY
NEXTStructured dataIN DEVELOPMENT
FUTURE3D where source supports itLONGER TERM
BUILT IN TAMIL NADU
Mechanical engineering meets applied AI.
Founded in Tamil Nadu in 2024, ZAi-Fi brings mechanical engineering education together with 2 years of MNC experience and 2 years of hands-on AI work. We’re applying that mix to the challenge of making legacy engineering drawings useful again.
Both directors studied mechanical engineering at Amrita Vishwa Vidyapeetham. In NIRF 2025, Amrita ranked 8th in India’s University category and 23rd in the Engineering category.
University ranks are category-specific; NIRF 2025.
START A CONVERSATION
Have legacy drawings?
Tell us what you have and what you need to do with it. We can discuss a representative sample and the right output for your team.
A GOOD FIRST CONVERSATION
Drawing class · approximate volume · intended use · output requirements
Please do not include confidential drawings in this form. We can discuss how to review a representative sample after we respond.