Experimental measuring of printing speed in FDM

  1. Dorado, R 1
  2. Pérez, F J 1
  3. Medina, G 1
  4. Guerrero, F 1
  1. 1 Department of Mechanical and Mining Engineering, University of Jaén, Campus las Lagunillas, A3, 23071, Spain
IOP Conference Series: Materials Science and Engineering

ISSN: 1757-8981 1757-899X

Year of publication: 2021

Volume: 1193

Issue: 1

Pages: 012037

Type: Article

DOI: 10.1088/1757-899X/1193/1/012037 GOOGLE SCHOLAR lock_openOpen access editor

More publications in: IOP Conference Series: Materials Science and Engineering


Fused Deposition Modeling (FDM) technology, based on material extrusion, helps additively manufacture, using cheap printers, stable mechanical parts in different materials. The dimensional deviations and staircase effect are the main drawbacks of this approach and limit its use to prototypes. The linear interpolation used to define the hot-end movements is responsible for continuous speed changes along the tool-path, contributing to dimensional and surface errors. In that sense, the study of the speed profile can help to improve the process. This work explains two printing speed estimation approaches an out-process measurement method, which estimates the average speed as a function of the interpolation segment length and direction, and an in-process method based on encoder measurements. We applied these solutions and an analytical approximation based on a trapezoidal speed profile to a printed 3D Archimedean spiral. All approaches detect abrupt speed changes, potential candidates to produce extrusion-movement synchronization problems, and, therefore, part errors.

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