On one of my machines I went from Marlin to Repetier and reduced the micro stepping from 1/32 to 1/16 on the DRV8825 drivers. The machine was fine with the full graphics lcd after that. I printed at speeds of upto 100mm/s for infill and 60mm/s for perimeters with no issues. My delta segments per second was set at 120 with no noticeable effect on quality. I was using Rumba which is Mega 2560 based. Prior to the changes the head 'stuttered' and hesitated especially on smaller circles which left blobs on the print
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