Here’s the full list of changes for the 1.4.

Public Betas can be downloaded from here. This guide is based on Grbl Version 1.1 (more specifically 1.1.f). Grbl is free to use open source software. If you have any issues while using a beta, you can just install whatever version you were using before, or grab the current public release version from the Trial/Download page. What is Grbl This is the software which runs on the router motherboard it basically takes GCode and translates it into the electrical impulses to the motors that control movements and speeds. The standard licensing rules apply - you’ll need to have a current license key to run these (or be in an active trial period). Please put ‘Public Beta’ in the subject line of your email. If you encounter a bug in a public beta, please let us know by sending an email to with as much information as you can recall - ideally, provide the steps required to reproduce the issue, and attach any screenshots, crash logs, or images as needed. We’ll gather feedback from users to address any issues at this public beta stage before doing a general public release. We’ll test to the point we normally would before a release, then make the new version available here for anyone who wants to try it. In order to improve the quality and stability of public releases we are introducing a “Public Beta” period for new LightBurn releases.

Download lightburn ramps 1.4