ScottW514
b5de7cda9d
The flowload drill in scripts/bench/live_fire_drills.py runs the two tests of the flow-check plan: t1 fires two CW fills on the press with the check at its defaults, t2 fires one fill of a chosen length with the check off, and fit reads rise against dose over the t2 records with the ADC offset steps masked. The sampler adds the heater output, /cool/status is polled at 1 Hz with the fan gates, and every controller reply is kept. The job is fed against the RX buffer's free count, M5 is acknowledged before a run, a run is refused while the window is armed, and M2 is acknowledged and the window's close is waited for. BRINGUP gets item 20: the arm at the first laser-on is skipped while the driver's spindle-state record reads on, the record is not cleared on disarm, and the serial layer drops bytes on a full RX ring, so a job with a lost M5 lets the next job run unarmed. CAMPAIGN-LOG records the Test 1 and Test 2 runs and their numbers. No catalog consequence: a bench drill on the dev image and documentation; no runtime behavior of the release image changes.
OpenGlow/ForgeFIRM Firmware for Glowforge
⚠️ IN DEVELOPMENT — NOT YET RELEASED
ForgeFIRM has no public release, yet. Nothing here is installable.
The documentation describes the firmware as it is being built and validated on the bench. It is here to be read, not followed.
The first public release is expected in September 2026. If you are interested in being an early tester, please reach out to the developer.
Open-source firmware for Glowforge brand CNC lasers. ForgeFIRM replaces the cloud-dependent factory software on the stock control board — no hardware modification — and gives the machine a local controller, a local web control panel, and a standard Grbl interface.
- Latest Release
- Installation Instructions
- Build Instructions
- Connecting LightBurn
- How motion and the laser are driven
- How cooling and airflow work
- The cameras and the video stream
- How the laser safing works
- How a release is tested before being accepted
- Community Support
What it does
Two controller modes, selected in the web panel and switchable while the machine is idle:
- GRBL mode: grblHAL runs on the machine and speaks Grbl 1.1 over TCP port 23, so LightBurn, UGS, cncjs, etc... drive the laser directly. Motion runs on the board's own hardware step engine (SDMA + EPIT), fed live by a local planner. M3/M4 dynamic laser power, coolant-flow verification, over-temp holds, and an operator button press to arm the laser for each job.
- Cloud mode: The machine presents itself as a stock Glowforge to the Glowforge web service, so the phone and web apps work as they always did. Optional, and off by default. GRBL mode jogs and cuts without it; the one GRBL-mode function that still reaches the Glowforge service is camera-referenced homing (below), until limit-switch homing lands.
- A web control panel: Machine status and position, coolant and fan telemetry, safety-switch states, live camera stream, machine settings, hardware diagnostics, firmware updates, and boot-slot management.
- Camera-referenced homing:
$Hfrom any sender runs the factory-style camera homing cycle through the Glowforge service (a Glowforge account and a live service session are required for$H; everything else in GRBL mode runs without them).
Hardware
The control board is common to Glowforge Basic, Plus, and Pro. The 5 MP (OV5648) camera modules are fully supported and hardware-validated. The 8 MP (OV8856) modules found in "HD" units have a complete capture path — the kernel patches, device tree and sensor-aware capture profile they need are all in the build, but it has never run on an 8 MP machine, so treat it as untested.
What this costs
ForgeFIRM is free in both senses: free as in beer, free as in speech. All of it is public and released under MIT and GPL licenses. Read it, build it, change it, use it, pass it on.
The work happens in public, including the parts that don't work yet, which are written up with more candor than flatters anyone. No paid tier. No license key, no subscription, no activation, no Pro edition, no feature parked behind a paywall. Nothing is held back for a rainy day, mostly because there's no plan for a rainy day.
If someone offers to sell you this firmware, the licenses allow it and nobody's calling it theft. Just note that you'd be paying for something that's given away. Get it from the source. Same price everywhere, and here you get to read what you're running.
Safety
These machines contain a CO₂ laser: it burns, blinds, and starts fires. Never defeat the lid switches or interlock. Never leave a running job unattended. Keep a fire extinguisher within reach. Read this before you cut your first job, and read this regulatory and legal section before installing. This document describes the hardware safety chain and the software gates ForgeFIRM stacks on it.
THIS IS EXPERIMENTAL SOFTWARE
Use of this software
could seriously maim or kill you or others, and could void your warranty.
Use it at your own risk.
This project is not affiliated with or endorsed by Glowforge.