Ensure your machine's firmware is GRBL v1.1 . If you are using an older machine with GRBL v0.9, you should use Candle 1.0 instead.
Why should you specifically target 1.1.7 over the latest version? Here are the key improvements introduced in this release: candle 1.1.7 download
Candle is a free, open-source software designed to control CNC machines running on GRBL firmware. Version 1.1.7 is the "Gold Standard" release, featuring a streamlined interface, essential probing tools, and high compatibility with GRBL 1.1 builds. It is the recommended software for beginners and intermediate users operating desktop CNCs like the Genmitsu 3018, Sainsmart, and generic GRBL-based machines. Ensure your machine's firmware is GRBL v1
If successful, the status bar in Candle will change from "Not Connected" to "Idle." Try clicking the jog buttons to see if your machine moves. Here are the key improvements introduced in this
: Includes a dedicated jog panel for moving the X, Y, and Z axes manually via on-screen buttons or a keyboard numpad. Heightmap/Auto-leveling