Electricity: motive power systems – Positional servo systems
Patent
1990-11-09
1992-07-14
Ip, Paul
Electricity: motive power systems
Positional servo systems
318571, 318572, 36447432, 36447427, 5116571, 5116577, G05B 1118
Patent
active
051306255
ABSTRACT:
This invention concerns a control unit for program-controlled machine tools with control circuits for the individual feed motors (20) of the moving machine parts (2) which are connected to the program control unit (34) and also contain at least one switching element (14) for manually switching on feed motors (20). In order to give the operator a feel for the respective operating process in manual operation, each control circuit according to this invention has at least one sensor (26, 42) for detecting a power parameter (I;M) of the respective feed motor (20). Furthermore, a brake gear (30 or 44) that is controlled by the output signals of the sensor (26; 42) is assigned to each switching element that is designed as a manually adjustable control element (14), whereby the braking device is actuated in proportion to the power parameters picked up by the sensors and it makes continued turning of the control element which is designed as a hand crank more difficult.
REFERENCES:
patent: 3766460 (1973-10-01), Hentz et al.
patent: 4623778 (1986-11-01), Cullen et al.
patent: 4831232 (1989-05-01), Andersson et al.
patent: 4831316 (1989-05-01), Ishiguro et al.
Ip Paul
MAHO Aktiengesellschaft
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