Provided is a diagnosis method of appropriately recognizing a state of a rolling surface of a track member of a rolling guide device or a lubrication state of rolling elements using a sensor mounted to the rolling guide device. The diagnosis method is applied to a rolling guide device including: a track member having a rolling surface extending along a longitudinal direction of the track member; and a moving member, which is assembled to the track member through intermediation of a plurality of rolling elements configured to roll on the rolling surface so that the moving member is movable along the track member, and has an endless circulation path for the rolling elements. The diagnosis method includes: detecting a moving speed of the moving member relative to the track member while detecting relative vibration displacement of the moving member relative to the track member using a vibration sensor mounted to the moving member; and diagnosing a running state of the moving member relative to the track member based on those detection results.

A rolling guide apparatus having a first member 1, a second member 2, and a rolling body unit 5, the apparatus including a guide path G of the rolling body unit 5 including a rolling path R configured to have a rolling groove 1a and a rolling groove 3a, and a circulation path C allowing communication between a start point and an end point of the rolling path R, the rolling body unit 5 being configured to have a plurality of first rolling bodies 5a and a plurality of second rolling bodies 5b each composed of an elastic material, at least one second rolling body 5b being always positioned in the circulation path C. The rolling guide apparatus is easy to be assembled and is capable of performing stable operations.

Provided is a motion guide device load measuring system that can accurately measure loads acting on a motion guide device in use. The load measuring system includes a position detecting unit (4) for detecting the position of a sliding member (12) relative to a track member (11) in a direction of relative movement, and at least one sensor (2a-2d, 3a-3d) for detecting the relative displacement of the sliding member (12) relative to the track member (11) in a radial direction and/or a horizontal direction. A calculating unit (6) calculates loads acting on the motion guide device (1), in association with the position of the sliding member (12), on the basis of position information detected by the position detecting unit (4) and displacement information detected by one or more of the sensors (2a-2d, 3a-3d).

The motion guide device includes a lubricant supply passage provided in at least one of a pair of cover members provided to a movable member and configured to supply lubricant to an endless circulation passage, in which the lubricant supply passage includes at least a first lubricant supply passage formed to extend in a direction orthogonal to a longitudinal direction of the track member from at least one of a left side surface and a right side surface of the cover member, and a second lubricant supply passage connected to the first lubricant supply passage , and a passage shape in a place connected to the first lubricant supply passage of the second lubricant supply passage is configured as a diameter-expanded hollow section having a diameter more expanded than a passage shape of another place. Thus, a new form of a cover member is provided.

A linear guide apparatus may include a guide rail, a carriage block, at least two recirculating tubes, and two end covers. The carriage block has an axial sliding channel formed at a middle portion of a bottom surface thereof, and the carriage block is slidably coupled on the guide rail through the sliding channel. Each of two sides of the sliding channel has at least a sliding groove formed between the carriage block and guide rail. Each sliding groove comprises a plurality of rolling balls installed therein so as to enable the carriage block to slide forward and backward on the guide rail. Each of the sliding grooves is cooperated with a recirculating channel axially penetrating through the carriage block. Each of the recirculating tubes comprises a plurality of spiral threads to enable the rolling balls to have lateral roll at a specific angle when passing therethrough.

A linear guide apparatus may include a guide rail, a carriage block, at least two recirculating tubes, and two end covers. The carriage block has an axial sliding channel formed at a middle portion of a bottom surface thereof, and the carriage block is slidably coupled on the guide rail through the sliding channel. Each of two sides of the sliding channel has at least a sliding groove formed between the carriage block and guide rail. Each sliding groove comprises a plurality of rolling balls installed therein so as to enable the carriage block to slide forward and backward on the guide rail. Each of the sliding grooves is cooperated with a recirculating channel axially penetrating through the carriage block. Each of the recirculating tubes comprises a plurality of spiral threads to enable the rolling balls to have lateral roll at a specific angle when passing therethrough.

A motion guide apparatus is provided which can make a carriage compact without reducing a rated load and an allowable load. The motion guide apparatus includes: a track member (1) and a carriage (2) that moves along the track member (1). A circulation path (7) of the carriage (2) includes a loaded path (C1), a return path (C2) parallel to the loaded path (C1), and a substantially U-shaped turn path (C3) connected to the loaded path (C1) and the return path (C2). At least a part of the turn path (C3) bends in side view in a direction where the loaded path (C1) and the return path (C2) coincide.

A rolling apparatus including an external member having a raceway surface on an inner peripheral surface thereof, an internal member having a raceway surface on an outer peripheral surface thereof, and a plurality of rolling elements which are rotatably provided between the raceway surface of the external member and the raceway surface of the internal member. A surface of at least one of the internal member, the external member, and the rolling elements is subjected to carbonitriding or nitriding; an area percentage of a nitride containing Si and Mn is 1% or more and 20% or less; surface hardness is HV750 or more. When depth from the raceway surface or depth from a rolling surface of the rolling element is defined as Z and diameter of the rolling element is defined as d, hardness at Z=0.045 d is HV650 to 850, and hardness at Z=0.18 d is HV400 to 800.

To suitably set a control gain in feedback control while suppressing an increase in apparatus size. A workpiece transport control system includes: one or a plurality of motion guidance devices; a table on which a workpiece is to be placed; an actuator which imparts a driving force to the table; a control unit which performs transport control by feedback control; and a calculation unit which calculates a transport load applied from the workpiece to a moving member of each of the one or a plurality of motion guidance devices, wherein a control gain related to the feedback control in the transport control is adjusted on the basis of the transport load in each of the one or a plurality of motion guidance devices.

A multi-row rolling element housing band is provided which can promote an increase in the degree of precision of a guide. At least three rolling element rows (17) to (19) are arranged in a band (15). Each second rolling element (18a) of the second rolling element row (18) is displaced by P/n in a length direction of the band (15) from each first rolling element (17a) of the first rolling element row (17). Each third rolling element (19a) of the third rolling element row (19) is displaced by P/n in the length direction of the band (15) from each second rolling element (18a) of the second rolling element row (18). P is the pitch between the first rolling elements (17a), and n is the number of rows.