Results 31 to 40 of about 123,626 (295)

A Fourier Series-Neural Network Based Real-Time Compensation Approach for Geometric and Thermal Errors of CNC Milling Machines

open access: yesAdvances in Mechanical Engineering, 2013
In order to improve the accuracy and efficiency of the real-time error compensation, a Fourier Series-Neural Network (FS-NN) based compensation methodology is developed to reduce the thermally induced geometric errors of CNC milling machines under ...
Wei Wang   +3 more
doaj   +1 more source

Thermal Error Modeling for Machine Tools: Mechanistic Analysis and Solution for the Pseudocorrelation of Temperature-Sensitive Points

open access: yesIEEE Access, 2020
The temperature-sensitive point is the input variable of the thermal error compensation model of computer numerical control (CNC) machine tools. At present, the most commonly used selection method is to measure the multipoint temperature and thermal ...
Hui Liu   +5 more
doaj   +1 more source

A novel haptic model and environment for maxillofacial surgical operation planning and manipulation [PDF]

open access: yes, 2012
This paper presents a practical method and a new haptic model to support manipulations of bones and their segments during the planning of a surgical operation in a virtual environment using a haptic interface. To perform an effective dental surgery it is
Arnez, Victor   +7 more
core   +1 more source

A Review of Machine Learning-Based Thermal Error Modeling Methods for CNC Machine Tools

open access: yesMachines
Heat source-induced thermal error is a primary element influencing the precision of CNC machine tools. A practical and economical approach to mitigating thermal errors is through thermal error compensation.
Sen Mu   +6 more
doaj   +1 more source

Dynamic error characteristics of touch trigger probes used with coordinate measuring machines [PDF]

open access: yes, 1998
This paper discusses the dynamic error characteristics of touch trigger probes used with coordinate measuring machines. During the investigation, a number of important parameters have been identified, including measurement speed, probe longitude ...
Butler, C, Johnson, R, Yang, QP
core   +1 more source

Development and Experimental Verification of a Thermal Elongation Prediction Model for Electric Spindles

open access: yesMachines
Thermal elongation in high-speed motorized spindles constitutes a major source of machining error in five-axis machine tools, critically impacting machining precision.
Xinyu Liu, Lefu Jiang, Han Ye
doaj   +1 more source

Non-Uniform Offsetting and its Applications in Laser Path Planning of Sterolithography Machine [PDF]

open access: yes, 2007
Laser path planning is an important step in solid freeform fabrication processes such as Stereolithography (SLA). An important consideration in the laser path planning is to compensate the shape of laser beam. Currently the compensation is divided into
Chen, Yong
core   +1 more source

Error compensation for thermally induced errors on a machine tool [PDF]

open access: yes, 1996
Heat flow from internal and external sources and the environment create machine deformations, resulting in positioning errors between the tool and workpiece. There is no industrially accepted method for thermal error compensation. A simple model has been selected that linearly relates discrete temperature measurements to the deflection.
openaire   +2 more sources

Evolutionary temperature compensation of carbon fixation in marine phytoplankton [PDF]

open access: yes, 2020
The efficiency of carbon sequestration by the biological pump could decline in the coming decades because respiration tends to increase more with temperature than photosynthesis.
Barton, Samuel   +6 more
core   +3 more sources

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