Abstract: A concrete grinder has a rotating planetary gearbox with counter rotating tooling plates attached. The planetary gearbox is powered directly from a trowel gearbox output shaft, which is connected to a center bore of the planetary gearbox. As the planetary gearbox rotates, tooling shafts are forced to counter rotate because the input shaft of the planetary gearbox is connected to a fixed pulley or sprocket. The planetary gearbox is sealed to keep water, dust or slurry from entering.

Abstract: A surgical instrument is provided. The surgical instrument includes: a handle assembly; a jaw assembly comprising a staple cartridge containing a plurality of staples and an anvil to form the plurality of staples upon firing; a drive assembly at least partially located within the handle and connected to the jaw assembly and the lockout mechanism; a motor disposed within the handle assembly and operatively coupled to the drive assembly; and a controller operatively coupled to the motor, the controller configured to control supply of electrical current to the motor and to monitor a current draw of the motor, wherein the controller is further configured to terminate the supply of electrical current to the motor in response to a rate of change of the current draw indicative of a mechanical limit of at least one of the jaw assembly, the drive assembly, or the motor.

Abstract: The present invention relates to a method for performing in-process compensating a machining operation on a workpiece, wherein the compensation process includes generating a control signal representative of magnitude of a contact force exerted on a cutting tool in a normal direction in relation to a machining surface of the workpiece, determining a compensation parameter value based on the control signal, and compensating the machining operation based on the compensation parameter value. The present invention also relates to corresponding machine arrangement for performing a machining operation on a workpiece, such as a hard turning process.

Abstract: A constant force finishing system used to finish a surface of a workpiece includes at least a first movement device arranged to apply a first movement to a finishing tool, the first movement having a range of distance D1. The finishing system also includes a constant force device (CFD) in mechanical communication with the finishing tool, the CFD arranged to apply a second movement in conjunction with the first movement to the finishing tool, the second movement having a range of ?1, where D1>>?1.

Abstract: A mask for performing high speed media finishing on airfoils includes a thicker portion and a thinner portion. The thicker portion is spaced further from an edge that will become a leading edge in the final airfoil than the thinner portion. The media is redirected by the thicker portion toward the edge where the finishing is to occur.

Abstract: A grindstone contact sensing technology capable of sensing the contact position of the honing grindstone with the inner circumference of the work at high precision. A servo motor for driving the spindle rotation, and a servo motor for driving the depth of cut are provided and used respectively as spindle rotation drive source for rotating and driving the rotary spindle having the honing tool and depth-of-cut drive source for moving the honing grindstone at a specified depth of cut, and the contact position of the honing grindstone with the inner circumference of the work is sensed from various electrical information (rotating speed, torque, current value, stagnant pulses, etc.) obtained from the operations of both the servo motors.

Abstract: In a non-circular workpiece grinding machine, a proximity sensor is arranged to face a non-circular portion of a workpiece for sensing a maximum diameter portion of the non-circular portion to detect that the maximum diameter portion is rotating in a detection phase section when the work spindle is rotating in a low speed rotational phase region in which the work spindle is controlled by a numerical controller to rotate at a low speed. Abnormality judging means is provided for judging that an abnormal workpiece rotation is occurring when the maximum diameter portion of the non-circular portion is not detected by the proximity sensor in the state that the work spindle is rotating in the low speed rotational phase region.

Abstract: In a grinding machine, a bed 10 has secured thereon a work head 11 which rotatably supports a work spindle 12 for supporting a workpiece W and mounts thereon a slide base 15 reciprocatively movable in a Z-direction parallel to the axis of the work spindle, and a wheel head 16 carrying a rotating grinding wheel 17 is reciprocatively movable on the slide base in an X-direction intersecting with the Z-direction. A measuring device 25 for measuring the dimension of the workpiece ground with the grinding wheel is mounted on an extreme end of a support arm 21 secured to the slide base to extend in the X-direction, through an actuator device 23 which is operable for moving the measuring device between a measuring position for engagement with the workpiece and a parked position for disengagement therefrom. The support arm passes over the workpiece, or passes through a space between the bed and the workpiece, or passes through the inside of the bed.

Abstract: The present invention provides a drive for a grinding or cutting machine. The drive comprises a body having a drive coupling for receiving at least one drive shaft in a manner so that the or each drive shaft is drivable by the drive. The drive also comprises a mount for mounting the body to a portion of the machine such as to a linkage arm of an earth grinding or cutting vehicle. The drive coupling is arranged to inter-fit with a portion of the or each drive shaft.

Abstract: An arrangement of grinding modules in a track grinder wherein a radial mismatch in narrow track bend radii can be considered in an exact manner without occurrence of constraining forces, enabling reprofiling to be reproduced in a simple manner. The arrangement provides a grinding tool with five degrees of freedom. Each grinding module is accommodated in an at least approximately vertical manner with a frame and in an at least horizontally manner on the frame with a holder. A housing in the holder is pivotably arranged around a shaft that is at least approximately parallel to the track to be ground. The grinding tool in the housing can be adjusted in a rectangular manner in relation to the track to be ground.

Abstract: A feeding robot which is capable of drawing a glass panel for a liquid crystal display from a cassette without bringing it into collision with the cassette, and then feeding the drawn glass panel with a reduced error, and a method for controlling the same. Determination is made as to whether an object to be fed has been accurately aligned with a traveling axis of the feeding robot. A turned angle of the object relative to the traveling axis is calculated if the object has not been accurately aligned with the traveling axis. The robot is turned by the turned angle and then draws the object. While the robot moves to a target position, a correction value for the target position is calculated, and the target position is then corrected by the calculated correction value. The feeding robot control method is capable of aligning the glass panel with a hand of the feeding robot using sensors in the robot.

Abstract: A grinder pressing device, wherein either the bottom part of a cylinder main body (10) of an air cylinder (1) in a vertical posture or a piston rod (11) is fixed to a fixed plate (2) and the other one is fixed to a movable plate (3) disposed under the fixed plate (2), either a guide table (G2) or a guide (G1) is mounted on the movable table (3) and the other one is mounted on the outer peripheral surface of the cylinder main body (20) and the guide plate (G2) is guided on the guide (G1) in a vertical direction under the rolling frictional condition through balls and, in the air cylinder (1), a coefficient of friction between the outer peripheral walls of a piston (12) and the piston rod (11) and the structural wall of the cylinder main body (10) is set lower by a metal seal so as to support the piston rod (11) by a ball bush movably in forward and backward directions over an extensive distance, a grinder (G) being mounted on the movable plate (3) and air pressures in upper and lower cylinder chambers (13 and

Abstract: An automotive vehicle body can be sanded with a robotic sanding (polishing) disk that is carried on a robotic head, such that the sanding disk has a relatively constant unit pressure on the vehicle surface as the head moves the sanding disk along the vehicle surface. An automatic supply mechanism can be employed to periodically remove a worn sanding disk from the head, and replace the worn sanding disk with a new sanding disk.

Abstract: An improved sensing device and method for leveling a semiconductor wafer in a chemical mechanical polishing apparatus, which easily detects the change of pressure from a semiconductor wafer contacting with the polishing surface. The present invention includes a polishing platen having a polishing pad on the upper leveled surface thereof, and fixed to a rotatable platen driving shaft. A carrier is rotatably provided on the upper surface of the polishing platen and holding the semiconductor wafer such that the lower surface of the semiconductor wafer is uniformly contacted with the polishing pad. A pressure detecting sensor senses the pressure applied from the semiconductor wafer on the polishing pad and outputs a corresponding signal.

Abstract: A three axis control for a machine tool which maintains a plane surface being ground or machined by a tool at a desired orientation. A base supports an intermediate plate on flexures, and the position of the intermediate plate in a plane parallel to the base is controlled by a pair of actuators that are spaced apart along a line that is parallel to the direction of movement of the intermediate plate and a workpiece past the tool. Sensors move along a planar reference surface as the intermediate plate moves and sense deviations of the intermediate plate from a straight line and control the actuators to maintain the intermediate plate in its desired path through closed loop control. The workpiece to be worked on is preferably mounted on a tooling plate that in turn is mounted on the intermediate plate about an axis parallel to the line of movement.

Abstract: A process for machining mils and similar work pieces, especially for grinding the roll surface to a desired shape which process is characterized by continuously meshing the distance between the part of the work piece (1) which is subjected to working and a reference measuring means, preferably a measuring point of the tool or means cooperating therewith, which depends on the position of the working tool (2), with a distance measuring means (4), as well as the temperature of the work piece at or close to the spot of working and/or the distance measuring point with a temperature measuring means (3), submitting signals corresponding to the measured value from the distance and temperature measuring means resp.