Ok I have a lowrider2 with the SKR1.2 board. During printing I get the “Unknown command: M221” error. Having searched the forum, the apparent solution was to reflash the firmware with the latest, I have done this with both the SKR and TFT display and I still get the error when I try to adjust to speed during a cut from the “percentage” menu. The error repeatedly pops up so fast that I cannot even exit out of the percentage menu. The only way out is to kill the power.
Similarly, if I go into the “babysteps” menu, I get the “Unknown command: M290” error.
How can we remedy this?