How to update controller firmware with CNC USB

Download latest version of CNC USB controller software here: PlanetCNC software download page

Firmware can be easily updated through menu options.

• Connect controller with USB cable and launch CNC USB software
• Select menu option “Machine/Firmware/Update”
• Wait around 10 seconds

If there is something wrong and you receive “Firmware update FAILED” message, just repeat procedure.

You can check your software and firmware version with menu option “Help/About”.

If you constantly get “Firmware update FAILED” or “Not in firmware mode” message, then you must put controller into firmware bootloader mode manually:

1. Disconnect controller from USB and power.

2. Short circuit the two designated pins (yellow rectangle in the picture). We suggest that you use a pair of tweezers for this.

3. Connect power and USB cable. If everything is OK then LED will start blinking very quickly. If LED is not blinking very quickly controller is not in bootloader mode and you need to start again.

4. Remove short circuit.

5. Now you can upgrade firmware through menu options as described at beginning.

1. Disconnect controller from USB and power.

2. Short circuit the two designated pins (yellow rectangle in the picture). We suggest that you use a pair of tweezers for this.

3. Connect power and USB cable. If everything is OK then LED will start blinking very quickly. If LED is not blinking very quickly controller is not in bootloader mode and you need to start again.

4. Remove short circuit.

5. Now you can upgrade firmware through menu options as described at beginning.