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Papers by Robin Löffler

Research paper thumbnail of Theoretical and Empirical Verification of the Stress Distribution in Stacked Ceramic Capacitors for Space Applications

Research paper thumbnail of Innovative Extruder Concept for Fast and Efficient Additive Manufacturing

IFAC-PapersOnLine, 2019

The current standard for the production of 3D printed components with the "Fused Deposition Model... more The current standard for the production of 3D printed components with the "Fused Deposition Modelling" (FDM) process allows the use of one or two printing nozzles with fixed diameters. The selected diameter of the nozzle represents a suboptimal compromise between the highest possible level of detail and a large flow rate to shorten the printing time. This paper describes the new concept of a rotatable print head with a slot-shaped nozzle opening and the real implementation of the print head in an FDM machine. The innovative concept presented here opens up new possibilities for the free adjustment of line widths to be printed and thus also of variable layer heights in a wide range. With the additional parameters achieved with this method, the printing time of parts with a high degree of detail, if necessary, can be enormously reduced. In addition, the modified printing nozzle and the modification of the program code used for conventional FDM machines are described.

Research paper thumbnail of Owl-Neck-Spine-Inspired, Additively Manufactured, Joint Assemblies with Shape Memory Alloy Wire Actuators

Biomimetics, Mar 11, 2023

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

Research paper thumbnail of Development and Implementation of a Guideline for the Combination of Additively Manufactured Joint Assemblies with Wire Actuators made of Shape Memory Alloys

Research paper thumbnail of Owl Neck Spine inspired, Additively Manufactured, Joint Assemblies with Shape Memory Alloy Wire Actuators

Nature provides plenty of good examples for simple and very efficient joint assemblies. One examp... more Nature provides plenty of good examples for simple and very efficient joint assemblies. One example is the enormously flexible cervical spine of American barn owls, which consists of 14 cervical vertebrae. Each pair of vertebrae produces a comparatively small individual movement in order to provide a large overall movement of the entire cervical spine. The biomimetic replication of such joints is difficult due to the delicate and geometric unrestricted joint shapes as well as the muscles that have to be mimicked. Using X-ray as well as micro computed tomography images and with the utilisation of additive manufacturing, it is possible to produce the owl neck vertebrae in scaled-up form, to analyse them and then to transfer them into technically usable joint assemblies. The muscle substitution of these joints is realised by smart materials actuators in the form of shape memory alloy wire actuators. This actuator technology is outstanding for its muscle-like movement and for its enormo...

Research paper thumbnail of Innovative Extruder Concept for Fast and Efficient Additive Manufacturing

IFAC-PapersOnLine, 2019

The current standard for the production of 3D printed components with the "Fused Deposition Model... more The current standard for the production of 3D printed components with the "Fused Deposition Modelling" (FDM) process allows the use of one or two printing nozzles with fixed diameters. The selected diameter of the nozzle represents a suboptimal compromise between the highest possible level of detail and a large flow rate to shorten the printing time. This paper describes the new concept of a rotatable print head with a slot-shaped nozzle opening and the real implementation of the print head in an FDM machine. The innovative concept presented here opens up new possibilities for the free adjustment of line widths to be printed and thus also of variable layer heights in a wide range. With the additional parameters achieved with this method, the printing time of parts with a high degree of detail, if necessary, can be enormously reduced. In addition, the modified printing nozzle and the modification of the program code used for conventional FDM machines are described.

Research paper thumbnail of Method for simulative reproduction, verification and technical adaptation as part of biological kinematics studies

Research paper thumbnail of Theoretical and Empirical Verification of the Stress Distribution in Stacked Ceramic Capacitors for Space Applications

Research paper thumbnail of Innovative Extruder Concept for Fast and Efficient Additive Manufacturing

IFAC-PapersOnLine, 2019

The current standard for the production of 3D printed components with the "Fused Deposition Model... more The current standard for the production of 3D printed components with the "Fused Deposition Modelling" (FDM) process allows the use of one or two printing nozzles with fixed diameters. The selected diameter of the nozzle represents a suboptimal compromise between the highest possible level of detail and a large flow rate to shorten the printing time. This paper describes the new concept of a rotatable print head with a slot-shaped nozzle opening and the real implementation of the print head in an FDM machine. The innovative concept presented here opens up new possibilities for the free adjustment of line widths to be printed and thus also of variable layer heights in a wide range. With the additional parameters achieved with this method, the printing time of parts with a high degree of detail, if necessary, can be enormously reduced. In addition, the modified printing nozzle and the modification of the program code used for conventional FDM machines are described.

Research paper thumbnail of Owl-Neck-Spine-Inspired, Additively Manufactured, Joint Assemblies with Shape Memory Alloy Wire Actuators

Biomimetics, Mar 11, 2023

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

Research paper thumbnail of Development and Implementation of a Guideline for the Combination of Additively Manufactured Joint Assemblies with Wire Actuators made of Shape Memory Alloys

Research paper thumbnail of Owl Neck Spine inspired, Additively Manufactured, Joint Assemblies with Shape Memory Alloy Wire Actuators

Nature provides plenty of good examples for simple and very efficient joint assemblies. One examp... more Nature provides plenty of good examples for simple and very efficient joint assemblies. One example is the enormously flexible cervical spine of American barn owls, which consists of 14 cervical vertebrae. Each pair of vertebrae produces a comparatively small individual movement in order to provide a large overall movement of the entire cervical spine. The biomimetic replication of such joints is difficult due to the delicate and geometric unrestricted joint shapes as well as the muscles that have to be mimicked. Using X-ray as well as micro computed tomography images and with the utilisation of additive manufacturing, it is possible to produce the owl neck vertebrae in scaled-up form, to analyse them and then to transfer them into technically usable joint assemblies. The muscle substitution of these joints is realised by smart materials actuators in the form of shape memory alloy wire actuators. This actuator technology is outstanding for its muscle-like movement and for its enormo...

Research paper thumbnail of Innovative Extruder Concept for Fast and Efficient Additive Manufacturing

IFAC-PapersOnLine, 2019

The current standard for the production of 3D printed components with the "Fused Deposition Model... more The current standard for the production of 3D printed components with the "Fused Deposition Modelling" (FDM) process allows the use of one or two printing nozzles with fixed diameters. The selected diameter of the nozzle represents a suboptimal compromise between the highest possible level of detail and a large flow rate to shorten the printing time. This paper describes the new concept of a rotatable print head with a slot-shaped nozzle opening and the real implementation of the print head in an FDM machine. The innovative concept presented here opens up new possibilities for the free adjustment of line widths to be printed and thus also of variable layer heights in a wide range. With the additional parameters achieved with this method, the printing time of parts with a high degree of detail, if necessary, can be enormously reduced. In addition, the modified printing nozzle and the modification of the program code used for conventional FDM machines are described.

Research paper thumbnail of Method for simulative reproduction, verification and technical adaptation as part of biological kinematics studies

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