A waterjet safety enclosure formed by walls using a detection device or light curtain to detect unsafe conditions. The waterjet safety enclosure walls can be used in new work areas or retrofitted and shaped to fit existing work areas. The waterjet safety enclosure walls may form a partial or complete perimeter about a work area and may be adjustable or mobile. The waterjet safety enclosure wall detects unsafe conditions when a high pressure stream of water from a waterjet cutting machine approaches, contacts or penetrates the waterjet safety enclosure wall. The detection device detects the high pressure stream of water and sends a signal to a controller to stop the operation of the waterjet cutting machine.

A waterjet safety enclosure formed by walls using a detection device or light curtain to detect unsafe conditions. The waterjet safety enclosure walls can be used in new work areas or retrofitted and shaped to fit existing work areas. The waterjet safety enclosure walls may form a partial or complete perimeter about a work area and may be adjustable or mobile. The waterjet safety enclosure wall detects unsafe conditions when a high pressure stream of water from a waterjet cutting machine approaches, contacts or penetrates the waterjet safety enclosure wall. The detection device detects the high pressure stream of water and sends a signal to a controller to stop the operation of the waterjet cutting machine.

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.

A cutting machine includes a table having a planar working surface lying in a working surface plane, a protective pane, a light curtain device configured to generate a light curtain, a crossbeam above the working surface and designed for linear positionability parallel to a first horizontal axis, and a module on the crossbeam and designed for linear positionability parallel to a second horizontal axis perpendicular to the first horizontal axis. The cutting machine further includes a control unit configured to control the cutting machine. The cutting machine has a first operating state and a second operating state. In the first operating state, the protective pane on a first side of the table is below the working surface plane. In the second operating state, both the protective pane and the light curtain on the first side of the table are at least partially above the working surface plane.

A cutting machine includes a table having a planar working surface lying in a working surface plane, a protective pane, a light curtain device configured to generate a light curtain, a crossbeam above the working surface and designed for linear positionability parallel to a first horizontal axis, and a module on the crossbeam and designed for linear positionability parallel to a second horizontal axis perpendicular to the first horizontal axis. The cutting machine further includes a control unit configured to control the cutting machine. The cutting machine has a first operating state and a second operating state. In the first operating state, the protective pane on a first side of the table is below the working surface plane. In the second operating state, both the protective pane and the light curtain on the first side of the table are at least partially above the working surface plane.

An image forming device performs image formation on a medium selected by a computer. When a cutting device is unusable, a long sheet-type medium accommodated in a first medium container is unusable. However, a conveyance passage used for conveying a short sheet-type medium is usable in at least one of a first state where the cutting device is unusable or a second state where the sheet-type medium is unable to pass through the cutting device. A necessary condition to make both the long sheet-type medium and the short sheet-type medium selectable includes the detector detecting neither the first status nor the second status. A necessary condition to make the long sheet-type medium unselectable and make the short sheet-type medium selectable includes the detector detecting one of the first status and the second status.

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.

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 safety system prevents cutting machine operators from being accidentally carried through the infeed chute into the machine's cutting mechanism. An operator wears a safety device on his wrist and/or ankle and a sensor array mounts on opposing sides of the cutting machine's infeed chute. The sensor array elements are wound in opposite directions and connect in series opposing. The magnetic field of the safety device induces a current in the sensor array as it moves in the proximity of the sensor array. The safety system generates a signal which is proportional to the sum of the induced currents. When the signal exceeds a threshold, the safety system shuts off power to the feed mechanism and/or the cutting blades of the cutting machine, preventing injury to the operator.