Stuttering delta while printing arcs is a classic problem with 8-bit cpu.
You can reduce the "segments per second" parameter and also the refresh rate for the LCD to free some cpu cycles. ( graphic LCD makes it worse )
Re: MCU utilization. A year or so back, I read a remark in Marlins github where a guy said the MCU was 90% of the time busy with refreshing the LCD.
Don't know how serious it was and if the programmers changed that in the later versions.
You can reduce the "segments per second" parameter and also the refresh rate for the LCD to free some cpu cycles. ( graphic LCD makes it worse )
Re: MCU utilization. A year or so back, I read a remark in Marlins github where a guy said the MCU was 90% of the time busy with refreshing the LCD.
Don't know how serious it was and if the programmers changed that in the later versions.