A method of wood shingle classification and sawing using machine vision comprises the steps of taking an image of a wood slab in a wood block and identifying a defect in that slab; comparing an image of this defect to images of confirmed defects in a database of confirmed defects to find a match of the defect in these images. If a match is not found, sawing a shingle from the slab and classifying the shingle while making abstraction of the defect. In a second aspect, when images of two consecutive shingles are identical, a third and subsequent shingles can be sawn from a block without taking images thereof. In another aspect, the comparing of images is done by an artificial intelligence system that is trained on a database of images that are associable to the subjectivity of experienced shingle sawyers.

The invention relates to a method for determining material dimensions of a longitudinal profiled section (2) during a sawing process, in which a saw blade (3) is advanced, the longitudinal profiled section (2) being machined by said saw blade (3) along a saw groove during this time; advancement position data of said saw blade (3) along the advancement path (s) being determined and, during this sawing operation, additional measurement data being determined from the group of sawing force (F.sub.s) or another variable which corresponds to the sawing force (F.sub.s). The invention is characterised in that an actual profile is determined from the advancement position data and said additional measurement data.

A device for cutting a length of pipe includes a clamp portion for clamping around a length of pipe and a bow moveable with respect to the clamp portion that retains a loop of diamond embedded wire. The device further includes a feed for driving the bow with respect to the clamp portion and a detector for detecting bending of the wire and a control responsive to the detector for controlling feed rates. The device is made of modular parts and has synchronizing arms for clamping around a length of pipe. In one embodiment, the wheels are retained in enclosures with slots through which the cutting wire passes.

Machines with safety systems are disclosed. The machine may take the form of woodworking machines including table saws, band saws, miter saws, hand-held circular saws, pneumatic chop saws, radial-arm saws, jointers, planars, routers and shapers. The machines may include an operative structure configured to perform a task, where the operative structure includes a cutting tool adapted to move in at least one motion, and a safety system adapted to detect the occurrence of an unsafe condition between a person and the cutting tool and for mitigating the unsafe condition. The safety system may include a detection subsystem and a reaction subsystem. The machine may also include a bypass or override mode where in an injury mitigation system is disabled for certain cuts.

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 table tool includes a table, a saw blade, a motor, a controller, a sensing device and a first switch. The table has a work plane on which a workpiece is placed. The saw blade acts on the workpiece. The motor drives the saw blade to rotate. The controller is used for controlling rotation of the motor. The sensing device is electrically connected to the controller and used for sensing a state of the workpiece and outputting a first signal to the controller. The first switch is used for a user to select a working mode from at least two working modes of the table tool. When the table tool is in a first working mode, the controller is configured to adjust a rotational speed of the motor to be a first rotational speed based on an acquired first signal or a working parameter of the motor.

A power tool with a rotatable tool designed as a saw blade or a milling cutter. The power tool includes a sensor device for detecting a mechanical quantity, the mechanical quantity including a force, an acceleration, a velocity, a deflection, a deformation and/or a mechanical stress. The mechanical quantity is dependent on a force emanating from the tool, and a control device communicatively coupled to the sensor device. The control device is adapted to recognize a kickback event based on the detected mechanical quantity, in which the control device is adapted to selectively determine a first recognition function or a second recognition function different from the first recognition function based on a function determination information, and to perform the recognition of the kickback event based on the detected mechanical quantity using the determined recognition function.

An automated crosscut saw system utilizing a wood scanning unit to optimize the cuts in a particular piece of wood to remove defects or flaws and a method of use therefor is provided. The automated saw system has the ability to scan and cut a piece of wood simultaneously or in rapid succession without the need for scanning the entire length of the wood prior to cutting. Further, the automated saw system may eliminate the need for a secondary feeder and secondary queue.

In accordance with an example embodiment, a saw blade sharpness mechanism for use on a tree sawing device, having a saw blade which rotates to saw trees. The saw blade dulls over time during normal operating conditions, and the speed of the saw blade decreases as the saw blade contacts the tree during sawing operation. The speed of the saw blade during sawing operations decreases more after repeated operations as the saw blade dulls. A sensor senses the speed of the saw blade. A processor receives inputs from the sensor and determines when the speed of the saw blade during tree sawing operation has decreased due to wear to a point that it would be more economical to replace the saw blade with a new sharper blade. When such condition is determined, the processor sends a signal to an indicator which sends a signal to the operator.

Apparatuses and methods based thereon are provided for onboard measurements in miter saws. A measurement device may be attached to or incorporated into a miter saw, where the measurement device being configured to provide onboard measurement when cuts are made using the miter saw. The measurement device may comprise a tape based measurement device. The measurement device may be portable to enable detaching it from the miter saw when on-location measurements are made, and attaching it to the miter saw when cut measurements are provided. The measurement device may comprise an output component (e.g., digital display) for outputting measurement readings and/or information associated with cut measurements. The measurement device (and/or the miter saw itself) may be configured for communicating signals wirelessly in accordance with one or more wireless technologies, such as to enable receiving measurements made remotely.