A cutting unit includes a spindle housing, a spindle, a mounter fixed to the front end portion of the spindle for supporting a cutting blade, and a fixing flange for fixing the cutting blade to the mounter. The mounter includes a boss portion for axially slidably supporting the fixing flange, the boss portion being fitted to an engaging hole formed in a central portion of the fixing flange, a flange portion projecting radially outward from the outer circumference of the boss portion, the flange portion having a supporting surface for supporting the cutting blade on the front side opposed to the fixing flange, and a cylindrical portion formed on the rear side of the flange portion. The flange portion has a suction hole opening. The cylindrical portion has a communication passage communicating with the suction hole. The communication passage is connected through a rotary joint to a suction unit.

A method and apparatus to verify that proper tooling has been installed in a cable preparation apparatus and/or to calibrate the tooling prior to running the cable preparation apparatus with a cable inserted therein. The method includes: inserting a reference device between blades of the cable preparation device; moving the blades inward toward the reference device until the blades engage the reference device; collecting data to determine when the blades engage the reference device; and comparing the collected data of the blades to an expected range of data of the reference device, wherein if the collected data of the blades does not conform to the expected range of data of the reference device the tooling is not validated, and the apparatus alerts the user.

A method and apparatus to verify that proper tooling has been installed in a cable preparation apparatus and/or to calibrate the tooling prior to running the cable preparation apparatus with a cable inserted therein. The method includes: inserting a reference device between blades of the cable preparation device; moving the blades inward toward the reference device until the blades engage the reference device; collecting data to determine when the blades engage the reference device; and comparing the collected data of the blades to an expected range of data of the reference device, wherein if the collected data of the blades does not conform to the expected range of data of the reference device the tooling is not validated, and the apparatus alerts the user.

A power tool having an integrated control system includes a workpiece supporting surface, a cutting instrument extendable above the workpiece supporting surface, a guard assembly securable above the workpiece supporting surface for covering at least a portion of the cutting instrument, a motor coupled with the cutting instrument, and a power switch operable for starting the motor for driving the cutting instrument. The power tool includes a control system in communication with the guard assembly for determining if the guard assembly is installed. Before the motor is started, the control system automatically disables the motor if it determines that the guard assembly is not installed. The control system includes a bypass switch for enabling starting of the motor when the guard assembly is not installed.

Table saws with safety systems are disclosed. The safety systems detect and react to dangerous conditions, such as contact between the blade and a person. The table saws may include a switch, a first light that illuminates to indicate the safety system is operable, and a second light that illuminates to indicate that the safety system is inoperable. The switch may not power the saw when switched on if the second light is illuminated.

Table saws with safety systems are disclosed. The safety systems detect and react to dangerous conditions, such as contact between the blade and a person. The table saws may include a switch, a first light that illuminates to indicate the safety system is operable, and a second light that illuminates to indicate that the safety system is inoperable. The switch may not power the saw when switched on if the second light is illuminated.

Woodworking machines and safety methods for use with those machines are disclosed. The machines include a detection system adapted to detect one or more dangerous conditions and a reaction system associated with the detection system. The reaction system can include an explosive to trigger the system, and also can be configured to retract a cutting tool at least partially away from a cutting region upon detection of a dangerous condition by the detection system.

A sheet processing apparatus includes, a punch unit configured to perform punching processing on a sheet conveyed from one of a plurality of sheet storing units capable of storing a sheet or a pre-punched sheet, an input unit configured to input a number of holes punched in the pre-punched sheet stored in one of the sheet storing units, an acquisition unit configured to acquire a number of holes that can be punched by the punch unit, a determination unit configured to determine whether the input number of holes coincides with the acquired number of holes that can be punched, and a control unit configured to display a predetermined warning in a case where the determination unit determines that the input number of holes does not coincide with the acquired number of holes that can be punched.

Table saws with safety systems are disclosed. The safety systems detect and react to dangerous conditions, such as contact between the blade and a person. The table saws may include a switch, a first light that illuminates to indicate the safety system is operable, and a second light that illuminates to indicate that the safety system is inoperable. The switch may not power the saw when switched on if the second light is illuminated.

Throat plates for table saws and table saws are disclosed. In some embodiments, the throat plates and/or saws have at least one securement mechanism to secure and prevent inadvertent removal of the throat plate from the throat of the saw. In some embodiments, at least one of the securement mechanisms also provides a height adjustment mechanism and/or prevents vertical removal of the throat plate. In some embodiments, the throat plate has an accessory mounting port that provides a portal for accessories, including safety accessories, to extend through the plate from beneath the table of the saw. In some embodiments, the port extends from the plate's outer perimeter to divide the plate's rear end portion into a pair of spaced-apart members. In some embodiments, these members are independently secured to the table saw and retained apart from each other by one or more of the securement mechanisms.