BdPressurePA — DWC Plugin

A DuetWebControl plugin for visualising bd_pressure Pressure Advance calibration logs on RepRapFirmware-based printers.

Part of the bd_pressure RRF fork — a RepRapFirmware implementation of the bd_pressure sensor by markniu.

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Features

• Load from Duet — fetches /sys/pa_calibrate_log.txt directly from the Duet SD card
• Drag and drop or file browse for local log files
• Three-panel chart — pressure score (res), slopes (lk/rk), signal quality (Hk/Ha)
• Best PA line — red dashed vertical line on all charts with label
• Good zone — green shaded band on the res chart covering all PA values within 20% of best
• Metadata chips — date, RRF version, bd_pressure version, mode, nozzle temp, PA sweep parameters
• One-click Copy M572 — correct extruder index read from log
• Analysis panel — automatic assessment of sweep quality:
  • Noise level (coefficient of variation)
  • Whether the minimum is near the edge of the sweep range
  • Curve flatness around the minimum
  • lk/rk slope asymmetry
• Suggested next sweep — zoom-in or range-shift parameters as a copyable GCode block
• Raw data table — all iterations, best row highlighted
• Light and dark mode support

All analysis runs entirely in the browser — nothing is sent to the Duet board.

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Requirements

• DuetWebControl 3.5 or later
• RepRapFirmware 3.5 or later (standalone Duet, no SBC required)
• bd_pressure sensor with RRF firmware v2.24 or later

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Installation

1. Download BdPressurePA-1.0.0.zip from the Releases page
2. In DWC go to Settings → Plugins → External plugins → Upload plugin
3. Select the zip and click Install
4. A PA Calibration tab appears under Plugins in the left sidebar

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Usage

1. Run a PA calibration with M98 P"/sys/pa_calibrate.g" on your Duet
2. Open the PA Calibration tab in DWC
3. Click Load from Duet — the log is fetched automatically from /sys/pa_calibrate_log.txt
4. Review the charts and analysis panel
5. If a suggested next sweep is shown, copy the parameters into pa_calibrate.g and run again

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Building from source

The plugin is built against the DuetWebControl 3.6 source tree.

Prerequisites

• Node.js 16+
• DuetWebControl 3.6 source (clone from Duet3D/DuetWebControl)

Build

cd /path/to/DuetWebControl
node scripts/build-plugin-pkg.js /path/to/bd_pressure_dwc_plugin

The built zip will be written to dist/BdPressurePA-1.0.0.zip.

Source layout

dwc-src/
├── index.js          Plugin entry point — registers the route
└── PaCalibration.vue Main component — charts, analysis, file handling
plugin.json           Plugin metadata

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Related

• bd_pressure RRF firmware & macros: https://github.com/jaysuk/bd_pressure
• Original bd_pressure (Klipper): https://github.com/markniu/bd_pressure
• Buy the sensor: https://www.pandapi3d.com/product-page/bdpressuree

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Licence

MIT — do whatever you like with it.