DeepAI
Log In Sign Up

Anti-aliasing for fused filament deposition

09/10/2016
by   Hai-Chuan Song, et al.
0

Layered manufacturing inherently suffers from staircase defects along surfaces that are gently slopped with respect to the build direction. Reducing the slice thickness improves the situation but never resolves it completely as flat layers remain a poor approximation of the true surface in these regions. In addition, reducing the slice thickness largely increases the print time. In this work we focus on a simple yet effective technique to improve the print accuracy for layered manufacturing by filament deposition. Our method works with standard three-axis 3D filament printers (e.g. the typical, widely available 3D printers), using standard extrusion nozzles. It better reproduces the geometry of sloped surfaces without increasing the print time. Our key idea is to perform a local anti-aliasing, working at a sub-layer accuracy to produce slightly curved deposition paths and reduce approximation errors. This is inspired by Computer Graphics anti-aliasing techniques which consider sub-pixel precision to treat aliasing effects. We show that the necessary deviation in height compared to standard slicing is bounded by half the layer thickness. Therefore, the height changes remain small and plastic deposition remains reliable. We further split and order paths to minimize defects due to the extruder nozzle shape, avoiding any change to the existing hardware. We apply and analyze our approach on 3D printed examples, showing that our technique greatly improves surface accuracy and silhouette quality while keeping the print time nearly identical.

READ FULL TEXT

page 2

page 3

page 7

page 8

page 9

page 10

page 11

page 12

10/03/2021

Coverage Axis: Inner Point Selection for 3D Shape Skeletonization

In this paper, we present a simple yet effective formulation called Cove...
03/10/2021

Anti-Counterfeiting for Polymer Banknotes Based on Polymer Substrate Fingerprinting

Polymer banknotes are the trend for printed currency and have been adopt...
02/04/2022

Differentiable Simulation of Inertial Musculotendons

We propose a simple and practical approach for incorporating the effects...
05/03/2018

Hatching for 3D Prints: Line-Based Halftoning for Dual Extrusion Fused Deposition Modeling

This work presents a halftoning technique to manufacture 3D objects with...
12/19/2021

Jamming Pattern Recognition over Multi-Channel Networks: A Deep Learning Approach

With the advent of intelligent jammers, jamming attacks have become a mo...
09/22/2017

STAR: Spatio-Temporal Altimeter Waveform Retracking using Sparse Representation and Conditional Random Fields

Satellite radar altimetry is one of the most powerful techniques for mea...
10/12/2016

Theory and computer simulation of the moiré patterns in single-layer cylindrical particles

Basing on the theory for arbitrary oriented surfaces, we developed the t...