The present invention provides a polishing apparatus for a panel which comprise a carrier, a disk which is rotatably arranged on a top surface of the carrier and a polishing mechanism. A plurality of trenches is located on the disk, and the polishing mechanism is used for polishing the panel disposed in the trench. The present invention further provides a method for polishing a panel. The present invention can polish batches of batches at one time. During the polishing process, the current panel is polished, and just turn the turntable to a suitable position to switch to the next panel to continue the grind process and repeat the process until all the panel polishing is completed. It reduces the polishing pause time between multiple panels and improves the polishing speed. It also avoids the blocking risk of the buffer panel zone.

A method for braking a rotating tool of an electric machine tool, wherein the electric machine tool includes a machine electronics system and a motor. A braking method in which the braking process includes sub-sequences for feeding back the released braking energy and for driving the electric motor. The braking method is characterized by a changeover between the sub-sequences, wherein the changeover takes place after predefined time periods for the individual sub-sequences have elapsed. An electric machine tool for carrying out the braking method is also provided. The electric machine tool may be, in particular, an electric grinder.

A method for braking a rotating tool of an electric machine tool, wherein the electric machine tool includes a machine electronics system and a motor. A braking method in which the braking process includes sub-sequences for feeding back the released braking energy and for driving the electric motor. The braking method is characterized by a changeover between the sub-sequences, wherein the changeover takes place after predefined time periods for the individual sub-sequences have elapsed. An electric machine tool for carrying out the braking method is also provided. The electric machine tool may be, in particular, an electric grinder.

A method for braking a rotating tool of an electric machine tool, wherein the electric machine tool includes a machine electronics system and a motor. A braking method in which the braking process includes sub-sequences for feeding back the released braking energy and for driving the electric motor. The braking method is characterized by a changeover between the sub-sequences, wherein the changeover can either be initiated as a function of a voltage in an intermediate circuit of the machine electronics system. An invention relates to an electric machine tool for carrying out the braking method is also provided. The electric machine tool may be, in particular, an electric grinder.

A skate blade alignment system used to align a skate blade sharpening system. The skate alignment system can align a grinding wheel for sharpening a skate blade secured within the skate blade sharpening system. A controller can enable alignment operations and control an alignment process.

A skate blade alignment system used to align a skate blade sharpening system. The skate alignment system can align a grinding wheel for sharpening a skate blade secured within the skate blade sharpening system. A controller can enable alignment operations and control an alignment process.

An accuracy of detecting a slip out of a substrate from a top ring is improved. A polishing unit 300 includes a polishing table 350, a top ring 302, a light emitting member 371, a slip-out detector 370, and an elimination mechanism 380. A polishing pad 352 that polishes a substrate WF is attached to the polishing table 350. The top ring 302 holds the substrate WF to press the substrate WF against the polishing pad 352. The light emitting member 371 emits a light to a detection area 372 on the polishing pad 352. The slip-out detector 370 detects a slip out of the substrate WF from the top ring 302 based on the light reflected from the detection area 372. The elimination mechanism 380 eliminates a polishing liquid flowing into the detection area 372.

A dust collector in one aspect of the present invention comprises a dust collection portion, a communication portion, and an interlock operation control portion. When the communication portion receives an interlock command transmitted from an electric working machine, the interlock operation control portion makes the dust collection portion operate interlocking with the electric working machine. The interlock operation control portion includes a storage portion, in which identification information specific to the electric working machine with which the dust collection portion is to be made to perform the interlock operation is stored.

A dust collector in one aspect of the present invention comprises a dust collection portion, a communication portion, and an interlock operation control portion. When the communication portion receives an interlock command transmitted from an electric working machine, the interlock operation control portion makes the dust collection portion operate interlocking with the electric working machine. The interlock operation control portion includes a storage portion, in which identification information specific to the electric working machine with which the dust collection portion is to be made to perform the interlock operation is stored.

A coolant nozzle carrier for use with a grinding machine that has a grinding spindle for supporting and driving a grinding disc with a rotational axis. The coolant nozzle carrier comprises at least two coolant nozzles and at least a center leg and two side legs that are attached to the center leg. Each of the side legs supports at least one nozzle and extends in a plane that is perpendicular to the rotational axis. The side legs are configured to accommodate the grinding disc in between the side legs with a moving gap defined between the grinding disc and the side legs.