Wall Jerk
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This setting determines the speed at which the nozzle can go through corners while printing the walls. This can be configured separately from the rest of the print.

During the printing of the walls, the printer is very sensitive to vibrations. If the print head vibrates in relation to the printed object, this will be visible in the form of ringing in the final print. It's useful to print the walls at a lower jerk rate than the rest of the print for this reason.

However, this will make the corners less sharp on the outside, because the nozzle will slow down further in the corner and then put down more material in the corner as well. This effect is particularly strong with Bowden-style printers where there is a longer delay in the reaction time of the feeder. It's a balancing act.