i’ve had my printer for 3 days now. today, i could not complete the paper calibration test on the right extruder. the bed would not rise high enough for the paper to be trapped by the extruder nozzle. basically, the bed just stops responding to the ^ key. i rebooted multiple times to no avail.
when the bed cannot upwards move anymore just press Accept. Then the Sigma will start printing in the air but don’t worry. Once it finished clear the bed and press REDO and it should allow you to move the bed further up this time.