The hand-back is the promise that a run leaves the machine where it found it. Two of its checks reported instead of restoring, and the machine sat in the state the run left it in. The cooling engine: a run that ends without ending its job leaves one alive behind it - the engine armed and holding for a job that is never coming back, the fans at run duty. The check waited two minutes for that to resolve itself, which it cannot, and wrote "failed: still run/armed=True/hold=True". On the bench reference the fans then ran for an hour. The pulse ring: bytes the last job never played sit there, and the next run replays them before its own. The check refused the return jog and wrote "clear the ring (controller restart) before moving" - the instruction, to a log, instead of the action. Both end the same way: stop the controller and let the supervisor bring it back. The job goes, the arm and the hold go with it, and the ring is empty on the way in. stand_down() does that and proves it settled; the cooling check calls it when the engine will not idle on its own, and the return jog calls it when the ring has residue, refusing only if bytes survive a restart. A leftover still reports what it found - the record of what the run did is the point - but it reports having fixed it. Host-proven: 62 baseline unit tests, including one that the hand-back calls the stand-down for ring residue rather than describing it.
OpenGlow / ForgeFIRM firmware for Glowforge
BETA
ForgeFIRM is in beta. Every release below 0.1.0 is a beta release. Expect problems, and expect frequent updates. Upgrade whenever a newer release is available, and report what you find on the community forum.
Open firmware for Glowforge brand CNC lasers. ForgeFIRM replaces the cloud-dependent factory software on the stock control board, with no hardware modification, and gives the machine a local controller, a local web control panel, and a standard Grbl interface. The factory cloud experience stays available as an option.
This repository is the base of the build and of the release: the
meta-forgefirm Yocto layer, the kas configuration, the image recipes, the
install and release scripts, the acceptance tool (forgetest/), the bench
tools (scripts/bench/), the bench actuator firmware (fixture/), and the
release artifacts (releases/).
Start here
https://docs.forgefirm.org/ is the documentation, and the source of truth for every fact about the machine and the firmware.
| Read this first | Safety |
| Put it on a machine | Installation |
| Use it | Usage, LightBurn |
| How the machine works | Technical |
| How ForgeFIRM works with it | ForgeFIRM internals |
| Build, test, release | Developers |
| Downloads | Releases |
| Questions | Community forum |
Build
kas build kas/forgefirm-glowforge.yml
Build covers the host setup, the two images, the source variant and the debug kernel. Release flow covers the pins, the push order and the signing pipeline.
Test
cd forgetest && python3 -m unittest discover -s tests -v
The acceptance catalog that gates a release, and the bench tools, are on Acceptance and The bench.
Contributing
AGENTS.md carries the rules for this repository and for the project: safety ordering, proof before done, the push order, and the writing rules. They apply to human contributors too, and Contribute is the same set on the site.
What this costs
Nothing. ForgeFIRM is free in both senses, under MIT and GPL licenses. There is no paid tier, no license key, no subscription and no Pro edition. If someone offers to sell it to you, the licenses allow it, but what you take home is their build rather than this one: get it from the source.
Safety
These machines contain a CO2 laser: it burns, blinds, and starts fires. Never defeat the lid switches or the interlock. Never leave a running job unattended. Keep a fire extinguisher within reach. Read Safety before you cut your first job, and Regulatory and legal before you install.
This is experimental software. Use of it could seriously maim or kill you or others, and it may void your warranty. Use it at your own risk.
This project is not affiliated with or endorsed by Glowforge.