M1730-Scale

SVG scale artwork and web generator for M1730 analog panel meters. Scales are typeset in ГОСТ тип А (GOST type A), the Russian technical drafting standard typeface.

Repository layout

M1730-Scale_template.svg   Inkscape working file (background, tick marks, labels)
M1730-Scale_paths.svg      Paths-only export — text converted to outlines
M1730-Scale_text.svg       Live-text export — embedded font, editable labels
fonts/                     ГОСТ тип А TTF (required for Docker build)
web/                       Flask web generator
k8s/                       Kubernetes manifests
Dockerfile                 Container build

SVG files

All canvases are 157.18 × 26.68 mm. The coordinate origin is offset: layer 1 carries transform="translate(-37.352226,-90.454928)", so absolute SVG coordinates begin around x=37, y=90.

File	Purpose
M1730-Scale_template.svg	Master Inkscape file. Contains background path, tick marks, unit label, numeric labels, and range label. Edit this one.
M1730-Scale_paths.svg	All text converted to outlines. Use for cutting plotters, laser engravers, or any workflow where fonts must not be embedded as live text.
M1730-Scale_text.svg	Live <text> nodes with the font embedded as base64. Smaller file; requires an SVG viewer that supports embedded fonts.

Open files in Inkscape (developed with v1.4.3). There is no build step — edit the SVG directly or use the web generator.

Web generator

A Flask app that generates scale SVGs from a form. Supports two output modes switchable in the UI:

• Paths — glyphs rendered as outlines via fontTools; opens cleanly in Inkscape, Illustrator, and cutting software
• Text — live <text> elements with the GOST font embedded as base64

Run locally

source .venv/bin/activate
cd web && python app.py      # http://localhost:5000

The font must be installed at /usr/local/share/fonts/г/ГОСТ_тип_А.ttf.

Form parameters

Field	Description
Unit	Symbol shown in the left panel (e.g. U, mA, %). Supports inline markup — see below
Range label	Text inside the coloured bar on the right (e.g. 5mA)
Mapping	Linear or Log. Log spaces values geometrically (major ticks evenly spaced, minor ticks crowding toward the high end) and requires Min and Max greater than 0
Min / Max	Numeric range of the scale
Major intervals	Number of major tick intervals
Minor per interval	Minor ticks between each pair of major ticks
Labels	Number of numeric labels; Labels − 1 should divide evenly into Major intervals
Custom labels	Optional comma-separated labels that override the calculated numbers; their count sets the number of labels. Leave blank to auto-calculate
Label size (mm)	Font size of the numeric labels, in millimetres (default 9)

Calculated numbers are rendered in fixed-point notation at 4 significant figures — never scientific (e.g. 10000, not 1e+04).

Unit markup

The Unit field accepts a lightweight shorthand (no LaTeX engine — everything is drawn as glyph paths in the ГОСТ тип А font and auto-sized to fit the panel):

Markup	Result
cm^2	superscript (^{...} for multiple characters)
H_2O	subscript (_{...} for multiple characters)
{1/2}	stacked fraction with a horizontal rule; a bare / stays inline

Constructs nest: {m/s^2} is a fraction with a superscript in the denominator, x^{1/2} a superscripted fraction. A unit containing markup is always emitted as paths, even in text-output mode, since it is a composite of glyphs and a rule.

Container

# Copy the font first (not redistributed via the registry)
cp /usr/local/share/fonts/г/ГОСТ_тип_А.ttf fonts/

docker build -t m1730-scale:latest .
docker run -p 5000:5000 m1730-scale:latest

The production image is at git.baumann.gr/adebaumann/m1730-generator.

Kubernetes

Manifests in k8s/ deploy to the works namespace with a Traefik v2 IngressRoute at works.baumann.gr/M1730-generator.

# Managed by ArgoCD — push to git to deploy
git push

Resources: namespace, deployment (1 replica, gunicorn), ClusterIP service, Traefik IngressRoute + stripPrefix middleware.

License

GPL-3.0 — see LICENSE.