In some examples, a material removal system may control movement of a material removal machine based on whether a material removal tool is in contact with a sample. A material removal system may include a material removal machine (e.g., saw, grinder, polisher, and/or more general material preparation and/or testing machine) that is configured to move at the urging of one or more actuators. The system may further include control circuitry configured to control movement (and/or speed, acceleration, etc.) of the material removal machine (e.g., via the actuators) based on one or more power, thermal, position, and/or other parameters that indicate whether the material removal tool of the material removal machine is in contact with a sample.

A grinder selection device includes: an input unit that inputs a grinding condition for a workpiece as a grinding target of grinding machining including at least the geometry of the workpiece and vibration data indicating vibration of a grinding machine, and grinder information about one or more grinders as grinder candidates to be used for the grinding machining; a learned model acquired through supervised learning using training data containing input data and label data, the input data containing an arbitrary grinding condition for a workpiece as a grinding target of grinding machining by an arbitrary grinding machine including at least the geometry of the workpiece and vibration data indicating vibration of the grinding machine, and grinder information about an arbitrary grinder, the label data being data indicating the adequacy or inadequacy of a combination between the grinding condition and the grinder information about the grinder; and a judgment unit.

A numerical controller looks ahead and analyzes commands indicated by a block contained in a program, and identifies a travel direction of a control target for each of the commands to calculate a time constant based on the identified travel direction. The numerical controller then sets a time constant for filter processing based on the time constant for each of the commands, and performs filter processing on command data subjected to a linear acceleration and deceleration process, based on the set time constant. The numerical controller then calculates movement of each axis for each interpolation period, based on the command data subjected to the filter processing.

A controller has a varying speed signal generation unit generating a varying speed command signal varying at predetermined amplitude and period, a current control unit generating a current command signal based on the varying speed command signal, a feedback control unit generating a correction signal based on a deviation between the varying speed command signal and a present rotational speed of the spindle motor and adding the correction signal to the current command signal, and a learning control unit calculating a disturbance component caused by cutting resistance based on the deviation every predetermined rotation angle of the spindle motor and, in synchronism with a rotation angle of the spindle motor corresponding to the varying speed command signal input into the current control unit, generating a compensation signal based on the disturbance component corresponding to the rotation angle and adding the compensation signal to the varying speed command signal.

A postprocessor device outputs a machining program for controlling a CNC machine tool. The postprocessor device includes: a characteristic shape recognition unit configured to read information about a characteristic shape to be machined from cutter location data including information about a characteristic shape; a section setting unit configured to set one or more set sections on a tool path in response to the information about the characteristic shape; and a motion generation unit configured to generate a machining program including instruction for changing at least one parameter to be used for controlling at least one axis of the CNC machine tool outside the set section and inside the set section.

A motor control device includes: a force command unit that designates a force to be applied to a workpiece to be machined by a machining device having a motor as a driving source; a force detecting unit that detects the force applied to the workpiece; a velocity-command calculating unit that calculates a velocity command based on the designated force and the detected force; a torque-command calculating unit that calculates a torque command based on the velocity command and the velocity of the motor; a motor control unit that controls the motor based on the torque command; a determining unit that determines the machining stage of the workpiece based on the detected force; and a gain changing unit that changes at least one of gains individually provided in the velocity-command calculating unit and the torque-command calculating unit in accordance with the determined machining stage.

A plate width control device capable of improving the precision of the width of a material to be rolled is provided. In a rolling system, a plate width control device includes an arithmetic unit calculating an estimated value of a deviation amount of the width of the material to be rolled in the vertical rolling mill, and calculating an estimated value of an expansion amount of the width of the material to be rolled when a head end of the material to be rolled is caught in the horizontal rolling mill, and a control unit controlling a gap amount of the vertical rolling mill such that the deviation amount of the width of the material to be rolled is eliminated, and compensating for the gap amount of the vertical rolling mill when the head end of the material to be rolled is caught in the horizontal rolling mill.

A system for acceleration adjustment of machine tool at rapid traverse includes a signal measurement module, a signal judgment module and an acceleration optimization module. The machine tool has a servo motor and a working platform. The signal measurement module measures signals while the servo motor drives the working platform from a first specific position to a second specific position, or from the second specific position back to the first specific position. The signal judgment module judges whether the actual maximum current value of the motor is equal to the manufacturer's specification according to the signals; and if negative, the acceleration optimization module calculates and optimizes an axial acceleration till an optimal value is achieved. Then, a curve smoothing time of the optimal acceleration is calculated and optimized by the acceleration optimization module. In addition, a method for acceleration adjustment of machine tool at rapid traverse is provided.

A numerical controller enabling prediction of a machining time considering a machine delay occurring in a machine. The numerical controller configured for predicting a reference machining time corresponding to a machining time not considering acceleration/deceleration of an predicting the number of times of acceleration/deceleration of the axis in machining storing information related to a deviation time corresponding to a difference between an actual machining time corresponding to a machining time required for actual machining by the machine and the reference machining time predicted in the machining, calculating a correction time for correcting the reference machining time based on the number of times of acceleration/deceleration predicted and the information related to the deviation time stored, and calculating a predicted machining time obtained by correcting the reference machining time using the correction time.

The present invention relates to a method for optimizing the productivity of a machining process of at least one CNC (Computer Numerical Control) machine, the CNC machine comprising at least one machining tool movable by one or a plurality of drive axes, the machining process being controlled by a given NC (Numerical Control) program defining at least a tool path for the at least one machining tool and a path velocity profile along the tool path, wherein the method includes increasing the path velocity along the tool path as compared to the path velocity profile defined by the given NC program, wherein increasing the path velocity along the tool path is effected in due consideration of the respective dynamical limit of each of the one or the plurality of drive axes, in particular in due consideration of the maximum axis-velocity and the maximum axis-acceleration of each of the one or the plurality of drive axes, and in due consideration of processing limits affecting the path velocity due to the machining capacity of the CNC machine, in particular of the machining tool. The method further comprises adapting the given NC program by the increased path velocity along the tool path.