Te c h n o S p h e r e
Volume 01 | Spring 2015
Technology Projects & Trends
TECHNOLOGY PROJECTS & TRENDS
SanTez Project: A Kinematically Redundant Planar
Laser Cutting Machine by IZTECH and Coşkunöz
Submitted by: Dr. M. İ. Can Dede; Dr. Gökhan Kiper; and Emre
Uzunoglu
Project Code: 01668.STZ.2012-2
Grant Period: December 2012 – June 2014
Principal Investigator: Assist. Prof. M. İ. Can Dede
Project Partners: Department of Mechanical Engineering, Izmir Institute of Technology & Coşkunöz Metal Form,
R&D Department
Project Group: Assist. Prof. M. İ. Can Dede (IzTech), Assist. Prof. Gökhan Kiper (IzTech), Assist. Prof. Dr. Erkin
Gezgin (İzmir Katip Çelebi University), Emre Uzunoğlu (IzTech), Dr. Tayfun Sığırtmaç (Coşkunöz), Ercan Mastar
(Coşkunöz), Sinan Tangül (Coşkunöz)
Budget: 1.070.000 TL
Scope Designing a New Generation Machine
This study focuses on the design, production and verification tests of
a new generation planar laser cutting machine. Conventional planar
laser cutting machines cannot achieve high acceleration values while
keeping desired positioning precision due to the inertial effects of
large moving masses. Although developing laser cutting tool
technology enables cutting machines to operate at high speeds with
less reaction times, conventional cutting machines maximize this
potential, only reaching up to 1.5-2g acceleration without loss of
precision. In the last 5-10 years, various international companies
configured kinematically redundant mechanisms by adding extra
actuation systems and were able to reach 5-6g acceleration levels.
This concept integrates an extra mechanism with relatively smaller
workspace to the main mechanism. Due to the relative sizes of the
mechanisms, the smaller one is called the micro mechanism and the
bigger one is called the macro mechanism.
THE GOAL OF THE PROJECT IS
TO DEVELOP A NOVEL
REDUNDANT MACHINE
DESIGN, WHICH CAN REACH
HIGH ACCELERATION LEVELS
(>6G) WHILE PRESERVING
THE SAME AMOUNT OF
POSITIONING PRECISION AS
THE CONVENTIONAL
MACHINES.
Conventional cutting machines do not possess the micro mechanism.
In this hybrid structure, the macro mechanism moves along the global
x and y axes while the micro mechanism moves along local x and y
axes. A perfect analogy of this type of assembly would be the human
arm and wrist. The hand cannot write fast enough with the required
precision if the wrist is locked. However, with the aid of the wrist one
can write much faster. Therefore, the positioning speed and
acceleration characteristics are enhanced with the aid of the micro
mechanism. Thanks to the relatively much more small inertia of the
parts of the micro mechanism, the machine can reach higher
accelerations. This project also requires a kinematically redundant
robot controller to optimize the actuator motion for the highest
acceleration that can be achieved by the mechanism.
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TechnoSphere
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