Report and discussion on “The design of automatic machine tools for electronic control”

1958 ◽  
Vol 37 (10) ◽  
pp. 627
Author(s):  
John Mitford Brice
Keyword(s):  
Machine Tools ◽  
Automatic Machine ◽  
Electronic Control

Electromagnetic compatibility in CNC machines upgrade

2020 ◽  
Vol 23 (3) ◽  
pp. 90-96
Author(s):  
Arcadiy Yu. Antonov ◽  
Dmitriy P. Danilaev
Keyword(s):  
Machine Tools ◽  
Electromagnetic Compatibility ◽  
Cnc Machine Tools ◽  
Cnc Machine Tool ◽  
Electronic Control ◽  
Cnc Machine ◽  
Electromagnetic Environment ◽  
Cnc Machines ◽  
Control Units ◽  
Element Base

Abtract One of the types of modernization of CNC machines is the replacement of outdated electronic control units with more functional and compact ones, made on a modern element base. However, in the course of work on the modernization of CNC machines, characteristic problems of electromagnetic compatibility arise. The report examines the features of the electromagnetic compatibility of equipment, blocks and assemblies of CNC machines during modernization. Based on the analysis of the factors characterizing the electromagnetic environment, typical failures of the electronic part of the control system of a CNC machine tool during testing, the need for the development of measures to ensure EMC is shown. All measures to ensure electromagnetic compatibility are not intended to reduce degradation, but to ensure the full implementation of all equipment functionality. General solutions are proposed that are applicable to the modernization of most second-generation CNC machine tools.

Design Criteria for Multi-Axis Closed Loop Computer Numerical Control Systems

1974 ◽  
Vol 96 (1) ◽  
pp. 36-40 ◽  
Author(s):  
A. E. Middleditch
Keyword(s):  
Control Systems ◽  
Machine Tools ◽  
Closed Loop ◽  
Position Control ◽  
Dynamic Performance ◽  
General Purpose ◽  
Automatic Machine ◽  
Numerical Control ◽  
Design Criteria ◽  
Control Loops

Automatic machine tools have traditionally been controlled by hard-wired numerical controllers (NC). Recently, systems have been introduced which use a general purpose mini-computer (CNC). Some of these computer systems generate position references and close the position control loops of the machine tool’s feed axes using software, while others retain these functions in hardware. If the software approach is used, the dynamic performance of the system may be degraded. This paper investigates the constraints necessary to avoid severe performance degradation.

The Chatterbox: A Device for Hearing Chatter as Sections are Cut

1973 ◽  
Vol 31 ◽  
pp. 360-361
Author(s):  
C. W. McCutchen ◽  
Lois W. Tice
Keyword(s):  
Machine Tools ◽  
Cutting Tool ◽  
Guerilla Warfare ◽  
History Of ◽  
Chatter Marks

Ultramicrotomists live in a state of guerilla warfare with chatter. This situation is likely to be permanent. We can infer this from the history of machine tools. If set the wrong way for the particular combination of cutting tool and material, most if not all machine tools will chatter.In more than 100 years since machine tools became common, no one has evolved a practical recipe that guarantees avoiding chatter. Rather than follow some single very conservative rule to avoid chatter in all cases, machinists detect it when it happens, and change conditions until it stops. This is possible because they have no trouble telling when their cutting tool is chattering. They can see chatter marks, and they can also hear a sometimes deafening noise.

Discussion—Session III: High speed machine tools for aircraft production

1955 ◽  
Vol 34 (4) ◽  
pp. 224
Author(s):  
F.C. Cooke ◽  
S. Radcliffe ◽  
H.A. Chambers ◽  
C. Bromage ◽  
Menelaus ◽  
...  
Keyword(s):  
Machine Tools ◽  
High Speed ◽  
Discussion Session ◽  
Aircraft Production ◽  
High Speed Machine
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