Similarly, the need to compensate for the effect of tool wear and other variations in automatic machining operations has required the institution of a feedback control of tool positioning and cutting rate in place of the formerly used direct mechanical motion.
Besson's designs, published in his illustrated treatise Theatrum instrumentorum (1569), introduced cams and templates (patterns used to guide the form of a piece being made) to the screw-cutting lathe, thus increasing the operator's mechanical control of tool and workpiece and permitting the production of more accurate and intricate work in metal.
The present plant model and dynamics would be useful for state estimator design in active control of tool chatter.
Relevant research that may be beneficial to the development of intelligent spindles is reviewed from six thrust areas, which include monitoring and control of tool condition, chatter, spindle collision, temperature/thermal error, spindle balance, and spindle health.
The research results will be of great benefit in the design and the selection of tool materials and in the control of tool wear in high-speed machining processes.
Hard milling is among few of the recently popularized technologies of metal cutting domain and is found under intense research for the purpose of estimation and control of tool wear.
This modulation of activity in retinotopic portions of occipital cortex may represent the early selection of relevant and suppression of irrelevant visual stimuli for the control of tool use actions.
Our results are consistent with this framework, in which the sensorimotor control of tool use is mediated by multiple context-specific internal models, with the contribution of different models being smoothly modulated by the context, such as the visual orientation of the tool.
