Patent EP0155218B1 successfully refreshed from Google Patents.
EP0155218B1
Expired / Lapsed
EP
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Tracing machine with impuls servo control,especially for the machining of glass panes
Assignee: Vegla Vereinigte Glaswerke GmbH
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Filing: 1985-03-14
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Granted: 1990-02-07
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Expires: 2005-03-14
Abstract
No abstract record available.
Inventors
- 👤 Heinz-Josef Reinmold
- 👤 Horst Mucha
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 11:28
CPC Classifications
C; C03; C03B; C03B33/00; C03B33/02; C03B33/04; B; B24; B24B; B24B17/00; B24B17/10; B24B9/00; B24B9/02; B24B9/06; B24B9/08; B24B9/10; G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/21; G05B19/25; G05B19/251; G05B19/253
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
81 words
Tracing machine, equipped on at least one of the coordinates axes with a carriage having a drive mechanism which comprises at least one three-phase linear motor (37), piloted from a data memory (43) containing a displacement programme, by a microprocessor (44) associated with a servo-controller (1), characterized in that this motor is an asynchronous motor, the servo-controller (1) of which, operating by pulse duration modulation, modulates on four quadrants the supply (R, S, T) to the primary circuit with sinusoidal current.
Claim 2
Dependent Claim
81 words
Tracing machine, equipped on at least one of the coordinates axes with a carriage having a drive mechanism which comprises at least one three-phase linear motor (37), piloted from a data memory (43) containing a displacement programme, by a microprocessor (44) associated with a servo-controller (1), characterized in that this motor is an asynchronous motor, the servo-controller (1) of which, operating by pulse duration modulation, modulates on four quadrants the supply (R, S, T) to the primary circuit with sinusoidal current.
Claim 3
Dependent Claim
36 words
Machine according to claim 1, characterized in that the pulse modulator (2) acts on at least two phases of the sinusoidal supply through the intermediary of an amplifier (4) having a final stage comprising power transistors.
Claim 4
Dependent Claim
54 words
Machine according to claim 2, characterized in that the control circuit is equipped with an induced voltage limiter comprising a switching transistor (24) supplied, in parallel with the windings (3) of the inductor (37), by a rectifier bridge (23) and governed by the modulator, which makes it conducting during the breaks between current pulses.
Claim 5
Dependent Claim
24 words
Machine according to claim 3, characterized in that the switching transistor is associated with an RC circuit (20, 21) and a load resistor (22).
Claim 6
Dependent Claim
32 words
Machine according to claim 4, characterized in that the modulator (2) governs the switching transistor through the intermediary of an OR circuit (25), a NOT circuit (26) and a separator stage (27).
Claim 7
Dependent Claim
23 words
Machine according to one of claims 1 to 5, characterized in that the servo-controller modulates at fixed frequency its supply from the grid.
Claim 8
Dependent Claim
36 words
Machine according to one of claims 1 to 6, characterized in that the servo-controller is supplied from a position indicator (40), constituted of a linear digital generator comprising an identification of forward travel and backward travel.
Claim 9
Dependent Claim
37 words
Machine according to claim 7, characterized in that the servo-controller is supplied, in addition, from a velocity indicator, constituted of a linear potentiometer (41), the output voltage of which supplies an electronic differentiator circuit (50, 51, 52).
Claim 10
Dependent Claim
29 words
Machine according to claim 7, characterized in that the servo-controller is supplied, in addition, from a velocity indicator, constituted of a linear pulse generator acting on a frequency-voltage transducer.
Claim 11
Dependent Claim
55 words
Machine according to one of claims 1 to 9, characterized in that the inductors (37) of the primary circuit of the linear motors form part of linear drive devices of the carriage (32), each possessing two cores (38) of comb-shape, facing towards each other, between which a conductor rail (39) constituting the secondary circuit passes.
Claim 12
Dependent Claim
75 words
Tracing machine in cartesian coordinates according to one of claims 1 to 10, characterized in that the carriage (32) is mounted in cruciform manner along the directions of coordinates axes, at the intersection of shafts (34, 34') movable on pairs of carrier rails (36, 36'), disposed respectively on each side of its working plane, through the intermediary of sliders (35, 35') each equipped with an inductor (37, 37') associated with a conductor rail (39, 39').
Claim 13
Dependent Claim
14 words
Machine according to claim 11, characterized in that it is intended for cutting glass.
References Cited (Backward Citations)
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