Evaluating the effect of force and duration on lithic usewear using a force and impedance controlled robot
Usewear analysis relies on the strength of the analogy between microscopic wear patterns produced in
laboratory experiments and those present on archaeological tools. Unfortunately, the physical processes that
control the production of these patterns, both in the lab and in the past, are subject to complex interactions.
One approach to reducing this complexity is to isolate factors (duration, material properties, or dynamics) that
influence wear patterns and try to identify their contribution. An important issue concerns the
possibility that wear on tools thought to have been used for a long time may in fact reflect
use with a higher force, as both factors should, in theory, affect wear (e.g., Key et al. 2014, JAMT).
We present results from experiments using a KUKA LWRiiwa force and impedance-
controlled robot to scrape beech plates. The input data for controlling the robot (force, torque, velocity,
position) were obtained from a dynamically monitored scraping experiment performed by humans
(Pfleging et al., 2015, PLoS One). Because of the high level of control, we are able to systematically vary the
duration and force and investigate their effect on the wear patterns, which are quantified via 3D surface
metrological methods using a focus variation instrument from Alicona.
Cite this Record
Evaluating the effect of force and duration on lithic usewear using a force and impedance controlled robot. Radu Iovita, Johannes Pfleging, Jonas Buchli. Presented at The 81st Annual Meeting of the Society for American Archaeology, Vancouver, British Columbia. 2017 ( tDAR id: 430549)
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Abstract Id(s): 16484