Free Downloads
Grbl Hot Wire Firmware and Software
This is the latest firmware and software for grbl, grblHAL and FluidNC. This was released in December 2025. It contains all the firmware and software in one download. See the post here for full details Grbl HotWire for CNC Foam Cutters
GRBL Hot Wire Firmware and Software V2.51 1.77 MB 8638 downloads
This is the latest software and firmware for the CNC Foam Cutter version v2.51,…Kerf Test G-code (XYZA) 72.24 KB 1855 downloads
Please follow the instructions in the ebook in the section entitled Kerf …Axis Letter Change
In the previous version (5.13) of the software/firmware, the axes letters were XYZU, which originated from the original grbl firmware. However, to simplify the implementation of further developments on grblHAL firmware and 32-bit controller boards, I decided to switch to the more conventional XYZA axes letters.
G-code generators can configure their axes for different axes letters, If you’ve got some g-code that you want to convert to the new axis letters use the Windows utility below to convert to the new format.
Change Axes Letter from XYZU to XYZA 617.93 KB 1504 downloads
This small Windows utility changes the axis letters from XYZU to XYZA. This will…GRBL 1.1 Hot Wire Mega 5X
Development of this firmware and software has now stopped please use Grbl Hot Wire above which has support for 8 and 32-bit boards and several new features. It’s easy to upgrade from previous versions and retains all your settings follow the instructions here https://rckeith.co.uk/grbl-hotwire-for-cnc-foam-cutters/#upgrading-from-version-513
G-code files.
G-code for Clark-Y (XYZA) wing 4.28 KB 1671 downloads
This is a Clark-Y test file for the Grbl HotWire Software using axes XYZA it can…Kerf Test G-code (XYZA) 72.24 KB 1855 downloads
Please follow the instructions in the ebook in the section entitled Kerf …Clark-Y test file for Marlin Firmware XYUV axes 42.18 KB 1040 downloads
Use this file to test the foam cutter using Marlin firmware from https://github.com/rcKeith/Marlin …G-code Clark-Y (XYUV) 250mm Root chord wing – LinuxCNC 4.28 KB 1174 downloads
This g-code accompanies the article LinuxCNC for 4 Axis CNC Foam Cutters This…TriCopter Frame – LinuxCNC 33.46 KB 1003 downloads
This zip file contains the gcode for the TriCopter frame. It requires a 3mm bit and…G-Code Generators
Using DAT files you can generate 4 axis g-code for wings. Several files are included in the download and more can be found here https://m-selig.ae.illinois.edu/ads/coord_database.html