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GRBL controller application with G-Code visualizer written in Qt.

Supported functions:

  • Controlling GRBL-based cnc-machine via console commands, buttons on form, numpad.
  • Monitoring cnc-machine state.
  • Loading, editing, saving and sending of G-code files to cnc-machine.
  • Visualizing G-code files.

System requirements for running "Candle":

  • Windows/Linux x86
  • CPU with SSE2 instruction set support
  • Graphics card with OpenGL 2.0 support
  • 120 MB free storage space

Build requirements:

Qt 5.4.2 with MinGW/GCC compiler


Experimental versions:

For GRBL v1.1 firmware

(for GRBL v0.9 and below use Candle 1.0)

Before creating new issue:

Candle works with CNC controlled by GRBL firmware, many problems can be solved by using proper version of GRBL, using proper configuration.

Please read GRBL wiki:

"Candle" main window: screenshot