Servomechanism monitor for numerically controlled machine tools

Details Servomechanism monitor for numerically controlled machine tools Servomechanism monitor for numerically controlled machine tools

1974-04-18

1976-12-07

Botz, Eugene G.

Registers

Transfer mechanism

Traveling pawl

318565, G05B 2302

Patent

active

039964540

ABSTRACT:
A system automatically and continuously monitors the performance of separate servomechanisms operating in each of the axes of numerically controlled machine tools to detect when actual machining errors exceed a predetermined maximum due to any malfunction by comparing actual feedback slide velocity, .DELTA.S.sub.2 /T, (as determined by change, .DELTA.S.sub.2, in a feedback position signal, S.sub.2, over a period of time, T) with the commanded system drive velocity, V, (as determined by the difference between commanded position and position feedback signals, S.sub.1 and S.sub.2, respectively, times a gain factor, K). The difference between .DELTA.S.sub.2 /T and K (S.sub.1 -S.sub.2) is machining error which can be used to detect actual error in any axis for alarm or corrective action.

REFERENCES:
patent: 3412280 (1968-11-01), DeGrande
patent: 3440504 (1969-04-01), Boskovich et al.
patent: 3576979 (1971-05-01), McCall
patent: 3633087 (1972-01-01), Vawter et al.
patent: 3757095 (1973-09-01), Kiwiet

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