78 lines
4.1 KiB
Markdown
78 lines
4.1 KiB
Markdown
# LightBurn control-machine observation
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- Date: 2026-10-24
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- Application: LightBurn Pro 2.1.03
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- Hardware state: laser physically disconnected by the operator
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- Scope: passive UI and local-preference inspection only
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## Confirmed in the running application
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The window title identified LightBurn Pro `2.1.03` with the operator-verified
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`Gradients DepthMap` project open. The active device was `100 JPT E2 MOPA`, the
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connection status read `Disconnected`, the port selector read `(Auto)`, and the
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loaded material library was `Mopa-100W-110mm`.
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The Cuts / Layers panel labels the MOPA controls as `Frequency (kHz)` and
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`Q-Pulse (ns)`. This independently establishes the UI display units needed by
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the offline importer contract; it does not establish the serialized-file unit
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or authorize conversion without the documented normalization rule.
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The visible selected-layer controls showed speed `1800 mm/s`, one pass, power
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`17%`, frequency `1000 kHz`, and Q-pulse width `10 ns`. The project layer list
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also showed an Image layer at `1800 / 59` and two additional layers at
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`12 / 59`. These values are observations of the open project, not recommended
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recipes.
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## Preference cross-check and preserved files
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The live preferences still contain four device records. The named JPT profile
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is `JCZFiber` over `LibUSB`, has a 110 x 110 mm work area, enables Q-pulse-width
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control, and requires framing before start. The profile stores a raw frequency
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range of 1 to 4000 and has home-on-startup disabled.
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The active preferences file and LightBurn's newest native `.lbprefs` backup
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were copied into PrivateStash with before/source-after/copy SHA-256 equality
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checks. Five operator-supplied PNG screenshots preserve every tab in the
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general Settings dialog: Editor Settings, Units and Grids, Display,
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Import / Export, and Camera. Their sanitized public records are in
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[`public-lightburn-control-machine-observation.jsonl`](../../evidence/public-lightburn-control-machine-observation.jsonl).
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Exact local paths, raw preferences and machine-specific fields remain private.
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The screenshots corroborate version `2.1.03` and show millimeters as the design
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unit. DXF import has unit auto-detection enabled with millimeters selected as
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the fallback, while SVG import uses the 96 DPI Inkscape convention with
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auto-detection enabled. The visible output curve tolerance is `0.050 mm`.
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These are observed application settings, not machine-safe processing values.
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## JPT Device Settings screenshots
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Three further operator-supplied screenshots preserve every tab in Device
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Settings for `100 JPT E2 MOPA`: Galvo and Basic Settings, Ports and Laser
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Settings, and Additional Settings. The first confirms a 110 x 110 mm field,
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linked metric control/design units, and enabled `Require Framing Before Start`.
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The laser-source pane identifies the source as `Fiber`, displays fiber type
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`IPG_YLPM`, enables Q-pulse-width control, and shows a UI frequency range of
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`1.000` to `4000.000 kHz`. The device name says JPT while the fiber-type field
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literally displays `IPG_YLPM`; this is recorded as an observed LightBurn value
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without interpreting it as a manufacturer identity or correcting it.
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The port assignments, correction coefficients, red-dot scaling, jump timing
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and laser timing are retained only in the private screenshots and preference
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snapshot. They are machine-specific evidence, not public defaults. The third
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tab explicitly labels its speed and acceleration fields as preview/simulation
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timing that does not affect the controller.
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## Collection limits
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The five general Settings screenshots and three Device Settings screenshots
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close both application-dialog screenshot items. The automation screenshot
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channel itself repeatedly returned `window capture timed out`; the operator
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supplied the screenshots directly instead. No substitute Support Data bundle
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was generated.
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No Start or Frame control was used, no USB endpoint or controller was opened,
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and no machine setting was intentionally changed. The operator's 110 mm lens
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statement remains operator-confirmed rather than photographically verified.
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Exterior hardware labels and startup/interlock notes remain open evidence
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items.
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