Starting from firmware 5.0.0 for the MK4, and firmware 5.1.0 for the MINI/+ and the XL, the printers will have the Input Shaper feature.
Input Shaper is a feature designed to reduce ghosting by canceling resonance vibrations. It works by analyzing the printer’s movements and applying a filter to the input signals. Thanks to faster travel speed and acceleration, it minimizes stringing and enables faster printing. The pressure in the nozzle from the faster printing is compensated by another firmware feature, the Pressure Advance.
We strongly suggest performing basic maintenance on the MK4 before you start to use the Input shaper to achieve the best possible print performance. Make sure the belts on the X and Y axes are not loose, the nozzle is in good shape, and there’s no debris on the smooth rods.
Due to high accelerations and print speed, the crash detection feature is not compatible.
To use the Input shaper, it is not only necessary to have the proper firmware, but also the Input shaper profile on PrusaSlicer. Once the profile is selected, you will see that the layer height profiles have been renamed to reflect their use better.
On the non-input shaper profile, the two qualities for each Layer height are
With the Input shaper profile, the two qualities for each Layer height are:
The Ultradetail profile in the Input Shaper settings is the Fast detail, which is the smallest layer height for the 0.4 mm nozzle Input shaper profile.
Note that the input shaper is not only determined by the printing (or travel) speed and acceleration, the firmware, or the hardware limits of the printer. The printing material is also a limiting factor. Every filament requires to be properly melted in the nozzle, extruded at the correct temperature, and cooled once deposited on the layer below. If the temperature and cooling are too high or too low, the print will inevitably have problems - mostly poor interlayer connection and compromised structural integrity in general. The "Speed" profiles for our printers are optimized, so a printed object can be finished fast, but with only a small impact on its structural integrity.
The G-code to apply is M593. Below are the parameters that can be set.
D - Set the input shaper damping ratio. If axes (X, Y, etc.) are not specified, set it for all axes. The default value is 0.1.
F - Set the input shaper frequency. If axes (X, Y, etc.) are not specified, set it for all axes. The default value is 0Hz, which means that the input shaper is disabled.
T[map] - Set the input shaper type, 0:ZV, 1:ZVD, 2:MZV, 3:EI, 4:2HUMP_EI, and 5:3HUMP_EI. The default value is 0:ZV.
R - Set the input shaper vibration reduction. This parameter is used just for 3:EI, 4:2HUMP_EI, and 5:3HUMP_EI. The default value is 20.
Limit to X-axis or Y-axis
X<1> - Set the input shaper parameters only for the X-axis.
Y<1> - Set the input shaper parameters only for the Y-axis.