摘要:
A numerical controller which gives an instruction to a machine tool that uses a main shaft motor (5) to return to the origin, in order to control the position of a tool. The main shaft can be returned to the origin by simply giving an instruction for returning to origin to a main shaft amplifier (SPA) that drives the main shaft motor (5). Prior to CNC-operating the machine tool according to the invention, the grid shifting amount (P 2 ) determined by a relationship of the main shaft motor (5) and the object to be controlled is set to the side of the spindle amplifier (SPA), and position data (P 3 ) corresponding to a distance from the origin of machine to a machining starting point transferred prior to a predetermined position stop instruction and the grid shifting amount (P 2 ) are added up together. Therefore, when the instruction for returning to origin is produced from the numerical controller to the spindle amplifier, the position control is automatically assumed, and the moving operation is started with respect to a desired position.
摘要:
This invention relates to a machine tool having two main spindles which are subject to driving control by servomotors (1 and 2) by giving velocity commands (Vcmd1) and (Vcmd2) for controlling, respectively, the speed of rotation of a first main spindle and that of a second main spindle to speed control circuits (3 and 4), thereby controlling the two main spindles of a machine tool such as a lathe in synchronous operation in order to machine a work efficiently. In the present invention, the angles of rotation of the main spindles are brought into conformity to effect the synchronous operation without fail and to enable a catch of another work during rotation.
摘要:
A method of controlling synchronized operation of a machine tool and an apparatus therefor. In a machine tool having two main spindles (14, 15), a work (18) is gripped by the first spindle and the second spindle controlled by control circuits (19, 20) that include a speed control unit and a position control unit. When the work is to be machined under this condition, digital speed instructions are fed to the two spindles simultaneously from, for example, a numerical controller. On each of the main spindles, separation means (sw2) is controlled to separate the position control unit from the speed control unit, the synchronized operation mode is set to switch the speed instruction to the position instruction, and the digital speed instructions are processed as position instructions to carry out the same position control. Therefore, the running speed of the two main spindles are brought into synchronism with each other, and the work is separated into two without giving excess force to the work.
摘要:
A numerical controller having a control function which permits a main axis to be stopped at any absolute position by a drive motor to determine the position of the main axis that controls the positioning. The numerical controller has storage means (6) for storing data related to a motor stop position and the rotational direction included in a control instruction via transfer means (3) which transfers the control instruction to the corresponding drive means, and has calculation means (7) which calculates a drive signal for stopping the motor at a predetermined position based on the stored data and feedback signals related to the speed and position of the motor. With the absolute position such as an angle and the rotational direction up to that position being instructed from the numerical controller, the motor side determines its position by itself.
摘要:
A motor controller for an NC machine tool having many kinds of motor models. When the control parameters corresponding to the motor models are set from the external side, correct control parameters are set for the motor models to reliably prevent any accident that may be caused by erroneous setting of the control parameters. The motor controller has registration means (22) into which will be registered specific model codes that represent control parameters of the motor models, and storage means (21) that temporarily stores the control parameters that are set and the model codes that are transferred. The model codes registered to the registration means (22) are compared with the model codes that are transferred, to recognize the motor models.
摘要:
This invention relates to a machine tool having two main spindles which are subject to driving control by servomotors (1 and 2) by giving velocity commands (Vcmdi) and (Vcmd 2 ) for controlling, respectively, the speed of rotation of a first main spindle and that of a second main spindle to speed control circuits (3 and 4), thereby controlling the two main spindles of a machine tool such as a lathe in synchronous operation in order to machine a work efficiently. In the present invention, the angles of rotation of the main spindles are brought into conformity to effect the synchronous operation without fail and to enable a catch of another work during rotation.
摘要:
When a main spindle (10) is rotated and the main spindle and a work are moved linearly and relative to each other in the axial direction (Z) of the main spindle in, for example, the threading of a machine tool, a spindle servo-motor (12) and a feed servo-motor (22) as the driving sources must be actuated while they are being synchronized. Generally, the spindle servo-motor drives directly the main spindle without resort to a reduction gear but the feed servo-motor drives a main spindle head (18) through reduction gears (26, 28). Therefore, the synchronization is generally governed by the acceleration/deceleration performance of the spindle servo-motor. The synchronization with maximum efficiency can be accomplished by accelerating and decelerating the main spindle while actuating the spindle servo-motor in line with its torque limit curves (L1, L2).
摘要:
In a machine to be operated such that tools and a work are always brought into synchronism with each other, method and device for controlling at the time of power failure adapted to retract tools to a safe area without breaking the tools and a work at the time of power failure. When a power fails during synchronous operation (S1), a power supply regenerating operation in a power supply regenerating power circuit is halted (S2), sending to a motor for tools and a motor for a work, respectively, braking commands for controlling them to a reduced speed which is good enough to generate regenerating energy needed not only to keep a predetermined synchronism therebetween but also to drive a motor for moving tool shafts (S3), and driving the motor for moving tool shafts with regenerating energy produced through the speed reducing operation of the motor for tools and the motor for a work so as to retract the tools to an area where they do no interfere with the work (S4).
摘要:
When a main spindle (10) is rotated and the main spindle and a work are moved linearly and relative to each other in the axial direction (Z) of the main spindle in, for example, the threading of a machine tool, a spindle servo-motor (12) and a feed servo-motor (22) as the driving sources must be actuated while they are being synchronized. Generally, the spindle servo-motor drives directly the main spindle without resort to a reduction gear but the feed servo-motor drives a main spindle head (18) through reduction gears (26, 28). Therefore, the synchronization is generally governed by the acceleration/deceleration performance of the spindle servo-motor. The synchronization with maximum efficiency can be accomplished by accelerating and decelerating the main spindle while actuating the spindle servo-motor in line with its torque limit curves (L1, L2).
摘要:
A numerical controller which gives an instruction to a machine tool that uses a main shaft motor (5) to return to the origin, in order to control the position of a tool. The main shaft can be returned to the origin by simply giving an instruction for returning to origin to a main shaft amplifier (SPA) that drives the main shaft motor (5). Prior to CNC-operating the machine tool according to the invention, the grid shifting amount (P2) determined by a relationship of the main shaft motor (5) and the object to be controlled is set to the side of the spindle amplifier (SPA), and position data (P3) corresponding to a distance from the origin of machine to a machining starting point transferred prior to a predetermined position stop instruction and the grid shifting amount (P2) are added up together. Therefore, when the instruction for returning to origin is produced from the numerical controller to the spindle amplifier, the position control is automatically assumed, and the moving operation is started with respect to a desired position.