cadsy/cad-technical-drawings

CAD Technical Drawings, Generated by Cadsy

Turn a STEP model into a labeled technical drawing automatically.

This sample was created with Cadsy from 3D models in the Zero-to-CAD-100k dataset. For every STEP model, Cadsy generated:

• one drawing using an ASME-style profile;
• one drawing using an ISO-style profile; and
• structured bounding-box labels for every retained annotation.

That is 65 CAD models, 130 technical drawings and their labels, produced through one repeatable generation pipeline.

Example

An ISO-style drawing generated from a STEP model, with the annotation boxes from its labels file drawn on top of the image.

Build CAD drawing datasets without drawing every sheet by hand

Cadsy turns existing CAD geometry into consistent, machine-readable drawing data. It can help teams create training sets, evaluation sets and customer-specific datasets for systems that need to understand mechanical CAD and technical drawings.

Use Cadsy to generate:

• paired STEP models and technical drawings;
• controlled ISO-style and ASME-style variants;
• annotation locations and text labels;
• repeatable datasets at a larger scale; and
• data tailored to particular part families or research tasks.

This repository is a public sample. To generate your own dataset with an API, visit cadsy.se. To provide any feedback please wirte to hello@cadsy.se.

Dataset contents

metadata.jsonl
samples/
  part_0001/
    model.step          # source CAD geometry
    asme.png            # drawing generated with the ASME-style profile
    asme_labels.json    # annotations for asme.png
    iso.png             # drawing generated with the ISO-style profile
    iso_labels.json     # annotations for iso.png
  part_0002/
    ...

metadata.jsonl contains one line per part:

Field	Type	Description
part_id	string	Part identifier, such as "part_0001"
source_row	int	Row index in the upstream Zero-to-CAD-100k dataset
uuid	string	UUID from the upstream row
model_step	string	Relative path to the STEP file
asme_image	string	Relative path to the ASME-style drawing
asme_labels	string	Relative path to the ASME-style drawing labels
iso_image	string	Relative path to the ISO-style drawing
iso_labels	string	Relative path to the ISO-style drawing labels

Each *_labels.json file contains {"annotations": [...]}. Every annotation has:

• type — label, dimension, callout, feature_control_frame, datum_definition, title_block_value, title_block_label, or projection_third_angle;
• view — sheet, front, side, or plan;
• text — the annotation text; and
• box — [x0, y0, x1, y1], normalized to the 2480 × 1754 image.

Important note

The ISO-style and ASME-style outputs are controlled synthetic generation profiles. They are intended for dataset development and evaluation; they are not certified manufacturing drawings or a substitute for engineering review.

License

This sample dataset is released under Apache License 2.0. See LICENSE. See Zero-to-CAD-100k dataset for source license.