Systems and methods for braking a power tool using a stamped brake resistor. The power tool includes a motor, a trigger configured to be actuated, and a brake switch coupled to the motor. A brake resistor assembly is selectively coupled to the motor via the brake switch and includes a stamped brake resistor. The stamped brake resistor includes a terminal portion and a resistive portion. The resistive portion includes a planar serpentine path. A controller including an electronic processor and a memory is coupled to the trigger, the motor, and the brake switch, and is configured to control power delivered to the motor based on a position of the trigger, determine to brake the motor during operation of the motor, and activate, in response to determining to brake the motor, the brake switch to connect the stamped brake resistor to the motor.

Systems and methods for braking a power tool using a stamped brake resistor. The power tool includes a motor, a trigger configured to be actuated, and a brake switch coupled to the motor. A brake resistor assembly is selectively coupled to the motor via the brake switch and includes a stamped brake resistor. The stamped brake resistor includes a terminal portion and a resistive portion. The resistive portion includes a planar serpentine path. A controller including an electronic processor and a memory is coupled to the trigger, the motor, and the brake switch, and is configured to control power delivered to the motor based on a position of the trigger, determine to brake the motor during operation of the motor, and activate, in response to determining to brake the motor, the brake switch to connect the stamped brake resistor to the motor.

A circular saw includes a support surface for a workpiece and which has a saw blade slot, a main drive motor arranged below the support surface for driving a saw blade in rotational movement, and a saw blade holder connected to the main drive motor for the purpose of transmitting the rotational movement A height-adjustment apparatus, with a height actuator and a transmission element coupled to the saw blade holder are arranged to set the spacing between a saw blade holder and the support surface An electronic interface provides the input of a saw blade projection. A protection apparatus is connected by signals to a monitoring apparatus and the height actuator and is adapted to activate the height actuator for quick lowering of the saw blade holder when a dangerous situation is recorded by the monitoring apparatus.

A circular saw includes a support surface for a workpiece and which has a saw blade slot, a main drive motor arranged below the support surface for driving a saw blade in rotational movement, and a saw blade holder connected to the main drive motor for the purpose of transmitting the rotational movement A height-adjustment apparatus, with a height actuator and a transmission element coupled to the saw blade holder are arranged to set the spacing between a saw blade holder and the support surface An electronic interface provides the input of a saw blade projection. A protection apparatus is connected by signals to a monitoring apparatus and the height actuator and is adapted to activate the height actuator for quick lowering of the saw blade holder when a dangerous situation is recorded by the monitoring apparatus.

A safety braking device for a machine tool for braking a processing tool driven by an electric motor via an output unit, more particularly an output shaft, includes at least one braking device which is provided to halt rotation of the output unit in a braking process. The braking device has at least a first braking stage and a second braking stage. The disclosure further relates to a machine tool having the safety braking device and to a method for operating a safety braking device.

A safety braking device for a machine tool for braking a processing tool driven by an electric motor via an output unit, more particularly an output shaft, includes at least one braking device which is provided to halt rotation of the output unit in a braking process. The braking device has at least a first braking stage and a second braking stage. The disclosure further relates to a machine tool having the safety braking device and to a method for operating a safety braking device.

Power tools with detection systems configured to detect a dangerous condition between a person and a cutting tool are disclosed. Fast-acting and low-inertia actuators useable in various applications where a high force must be applied very quickly are disclosed. In power tools, for example in a woodworking machine, a fast-acting and low-inertial actuator as disclosed herein can be used to retract a blade upon detection of a dangerous condition by a detection system. Power tools with a magnetic force holding a blade from retracting until a detection system detects a dangerous condition are disclosed.

A sawing device includes a sawing machine and a safety module. The sawing machine has a worktable having a work plane, a saw blade box pivotably disposed on the worktable, a motor disposed on the saw blade box, and a saw blade connected with the motor and partially accommodated in the saw blade box. The safety module has a visual element disposed above the worktable and defining safety and danger zones for the work plane, and a controller electrically connected with the motor and the visual element. When the visual element captures that an object is located in the danger zone or determines that an object is about to enter the danger zone according to the movement trajectory of the object, the visual element transmits a brake signal to the controller to make the controller control the motor to stop operating. The sawing device improves the operation safety.

A sawing device includes a sawing machine and a safety module. The sawing machine has a worktable having a work plane, a saw blade box pivotably disposed on the worktable, a motor disposed on the saw blade box, and a saw blade connected with the motor and partially accommodated in the saw blade box. The safety module has a visual element disposed above the worktable and defining safety and danger zones for the work plane, and a controller electrically connected with the motor and the visual element. When the visual element captures that an object is located in the danger zone or determines that an object is about to enter the danger zone according to the movement trajectory of the object, the visual element transmits a brake signal to the controller to make the controller control the motor to stop operating. The sawing device improves the operation safety.

A blocking element for an emergency brake unit of a sawing device has a circular disc-shaped saw blade. The blocking element has a bearing portion, via which the blocking element is configured to be mounted on the sawing device, a head portion which is designed to engage into the saw blade selectively for braking purposes, and a deformation portion which is located between the bearing portion and the head portion and/or connects the bearing portion and the head portion to one another and which is arcuate and designed to be plastically shortened to brake the saw blade in an arc circumferential direction. A sawing device has a circular disc-shaped saw blade and an emergency brake unit. The emergency brake unit has such a blocking element which is mounted on the sawing device such that it can engage selectively into the saw blade to brake the saw blade.