The company Ulendo Technologies has issued a paper critical of current approaches to vibration compensation in 3D printing. The input shaping method currently used by many manufacturers leads to a loss of precision and must be replaced by better methods, according to Ulendo.
Input shaping compensates for printing vibrations by suppressing certain frequency ranges. However, according to Ulendo founder Professor Chinedum Okwudire, this comes at a loss of precision. Corners and edges would be rounded and web fidelity would suffer. The results are often insufficient for use in production.
As an alternative, Ulendo recommends the FBS (Filtered B-Splines) method it developed itself. Instead of delayed commands as with input shaping, inverted commands are used for vibration suppression. This allows for more targeted compensation without loss of precision, the company says. In addition, FBS can be used for larger and more complex printers, it said.
Ulendo said it is already working with several 3D printer manufacturers to integrate FBS into existing machines. This allows printing speeds to be more than doubled in some cases, while maintaining part quality. In addition to retrofitting existing printers, Ulendo says it is also possible to use the process ex works.
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