A lathe includes a spindle, an opposite spindle, a tool post, a controller, and a contact-type breakage detector. The controller determines whether the cut-off tool is broken according to a control parameter for controlling at least one of the spindle and the opposite spindle at a first detection timing immediately after the cut-off tool cuts off the bar material while the opposite spindle holds the bar material held by the spindle. The controller determines whether the cut-off tool is broken according to a detection result by the contact-type breakage detector at a second detection timing different from the first detection timing.

A cutting tool mounting assembly includes a base that defines a receptacle. A bushing is configured to be received in the receptacle and includes an aperture. A rotatable cutting tool is received in the aperture of the bushing. The rotatable cutting tool includes a cutting tip. The cutting tool mounting assembly includes a split, modular and wireless wear detection system including a target proximate the cutting tip for emitting a signal representative of the wear of the cutting tip, a sensor element for detecting the signal emitted by the target at a spaced apart location with respect to the target, a data recording and data transmitting device for recording data from the sensor element and for wirelessly communicating the data to a processor and/or a display device.

A cutting tool mounting assembly includes a base that defines a receptacle. A bushing is configured to be received in the receptacle and includes an aperture. A rotatable cutting tool is received in the aperture of the bushing. The rotatable cutting tool includes a cutting tip. The cutting tool mounting assembly includes a split, modular and wireless wear detection system including a target proximate the cutting tip for emitting a signal representative of the wear of the cutting tip, a sensor element for detecting the signal emitted by the target at a spaced apart location with respect to the target, a data recording and data transmitting device for recording data from the sensor element and for wirelessly communicating the data to a processor and/or a display device.

A machine tool having a separately replaceable tool post is provided. The machine tool includes supports that are facing each other with an axis line of a main axis in an axial direction therebetween; a rotation tool post detachably connected on one of the supports and rotatable with respect to a first direction perpendicular to the axis line; a fastening member detachably connecting the rotation tool post on the one of the supports, wherein the rotation tool post includes: a rotation unit configured to rotate in the first direction on the one of the supports; an upper fastening unit at an upper portion of the rotation unit, and detachably fastened to the one of the supports; and a lower fastening unit at a lower portion of the rotation unit, and detachably fastened to the one of the supports so that the rotation unit is rotatable.

A machine tool having a separately replaceable tool post is provided. The machine tool includes supports that are facing each other with an axis line of a main axis in an axial direction therebetween; a rotation tool post detachably connected on one of the supports and rotatable with respect to a first direction perpendicular to the axis line; a fastening member detachably connecting the rotation tool post on the one of the supports, wherein the rotation tool post includes: a rotation unit configured to rotate in the first direction on the one of the supports; an upper fastening unit at an upper portion of the rotation unit, and detachably fastened to the one of the supports; and a lower fastening unit at a lower portion of the rotation unit, and detachably fastened to the one of the supports so that the rotation unit is rotatable.

A conversion assembly for affixing a modern guideway to a manually operated machine tool guideway in a nondestructive manner. The conversion assembly mates to the existing machine tool guideway using surface tension via non-destructive compressive and/or tensile forces in order provide a suitable support surface upon which a modern guideway can be affixed.

A machine tool and a controller for the machine tool that accurately detect a defect in a cutting-off process due to breakage of a cutting-off bit and the like is provided. The machine tool includes: a spindle 110 for holding one end side of a workpiece W; an opposed chuck 131 that is opposed to the spindle 110 and is movable with holding another end side of the workpiece W; and a spindle moving motor 122 for moving the spindle 110. The machine tool or the controller is provided with a load detector 172 for detecting a load of the spindle moving motor 122, and workpiece separation detector 173 for detecting a defect in a cutting-off process from the load in performing a taking out operation.

A machine tool and a controller for the machine tool that accurately detect a defect in a cutting-off process due to breakage of a cutting-off bit and the like is provided. The machine tool includes: a spindle 110 for holding one end side of a workpiece W; an opposed chuck 131 that is opposed to the spindle 110 and is movable with holding another end side of the workpiece W; and a spindle moving motor 122 for moving the spindle 110. The machine tool or the controller is provided with a load detector 172 for detecting a load of the spindle moving motor 122, and workpiece separation detector 173 for detecting a defect in a cutting-off process from the load in performing a taking out operation.

The present invention provides a machine tool in which drops in lathe precision can be prevented and the angle of rotation of a lathe tool can be set. The machine tool comprises: a spindle head to which a spindle is provided: a tool holder which holds the lathe tool and is mounted on the spindle; a securing member, provided to the spindle head, for securing the lathe tool while allowing adjustment of the angle of rotation of the lathe tool: and an attachment member, provided to the tool holder, for attaching the lathe tool to the securing member at an adjusted angle of rotation, wherein the angle of rotation of the lathe tool is adjusted in accordance with where on the securing member the attachment member is attached.

A method includes scanning a thickness of a workpiece in at least one point using a thickness sensor, determining that the workpiece is out of alignment in a cutting machine using the thickness sensor, and realigning the workpiece relative to the cutting machine or adjusting a machining operation using a controller of the cutting machine in response to determining that the workpiece is out of alignment.