01 FAQ

I got the error "$H < error: Setting disabled" when I press the Home Button why?

You probably did not configure the Homing sequence in your Arduino GRBL parameter. Take a look at the GRBL site Homing Cycle

I got the error "G38.2Z-1F10 < error: Alarm lock" when i click on the Probe Button why?

You probably did not configure the probe input in your Arduino GRBL parameter. See Probe Config or did not connect a probe to the arduino input Analog IN A5

Is it normal that the LED TX and RX Always Flash on the Arduino even if there is no command send and the program is in IDLE State?

Yes the grblControl always issue a '?' command to inquire about feedback from the Arduino/GRBL in fact it is good news if thoses two LED blink.

G-code program visualization doesn't work. How to fix it?

If in a visualizer window nothing is displayed, even axes and text: probably your graphics card doesn't support OpenGL 2.0 or you haven't installed the latest drivers. Update drivers, try different graphics card or use grblControl v0.5.2.

Only G-code program not visualized: most likely your G-code program doesn't have any command which sets "Z" coordinate. Add "G90G0Z0" command to the program start.