Abstract: A linear motion guide unit where there is provided a tiny mechanism to keep a cage retaining therein more than one rolling element against wobbling. The cage retaining rolling elements holds therein a pinion, which mates with racks lying in the raceway grooves. A pinion holder is allowed to snap into a hook hole formed in the cage. To this end, the pinion holder has a flange extending out of any side of the pinion holder so as to come into abutment against any one surface of an edge around the hook hole, and an snap hook extending out of the other side of the pinion holder to come into engagement with another surface of the edge around the hook hole.

Abstract: A linear motion guide unit where there is provided a tiny mechanism to keep a cage retaining therein more than one rolling element against wobbling. The cage retaining rolling elements holds therein a pinion, which mates with racks lying in the raceway grooves. A pinion holder is allowed to snap into a hook hole formed in the cage. To this end, the pinion holder has a flange extending out of any side of the pinion holder so as to come into abutment against any one surface of an edge around the hook hole, and an snap hook extending out of the other side of the pinion holder to come into engagement with another surface of the edge around the hook hole.

Abstract: In a linear motion guide unit in which a rack-and-pinion arrangement is interposed between paired guide rail members to keep a cage against falling off from the guide rail members, the rack is made reduced in size in depth direction to fit well in even a gutter cut small in depth in the guide rail member. The rack is made up of successive teeth mating with the pinion, and side walls to join the teeth together with one another. The side walls of the rack are rendered thickened sidewise with depth while sidewise opposing surfaces defining a gutter cut in the guide rail also lean away one another with depth in a way conforming to the side walls of the rack, so that the rack can be fastened in the gutter by virtue of face-to-face engagement of the side walls with the associated surfaces in the gutter.

Abstract: In a linear motion guide unit in which a rack-and-pinion arrangement is interposed between paired guide rail members to keep a cage against falling off from the guide rail members, the rack is made reduced in size in depth direction to fit well in even a gutter cut small in depth in the guide rail member. The rack is made up of successive teeth mating with the pinion, and side walls to join the teeth together with one another. The side walls of the rack are rendered thickened sidewise with depth while sidewise opposing surfaces defining a gutter cut in the guide rail also lean away one another with depth in a way conforming to the side walls of the rack, so that the rack can be fastened in the gutter by virtue of face-to-face engagement of the side walls with the associated surfaces in the gutter.

Abstract: A linear motion guide unit in which rolling applicators transfer lubricant from a lubricant-containing member to raceway grooves on a track rail to make less sliding-friction resistance to a sliding element. The guide unit has a case accommodating therein the lubricant-containing member, and rolling applicators supported for rotation by a bearing member in the case. The lubricant held in the lubricant-containing member is applied onto the raceway grooves on the track rail through the rolling applicators, the peripheries of which are kept on sliding contact with the lubricant-containing member, thereby lubricating the confronting raceway grooves of the track rail and the sliding element, along which rolling elements run through in the sliding element. The frictional resistance that is encountered when the rolling element run through the track rail is the frictional resistance to rolling motion, which makes less the sliding resistance to the sliding element.

Abstract: This linear motion rolling guide unit is able to detect the relative positions and so forth of a track rail and slider by forming narrow grooves 21e in track rail 21 and arranging extremely narrow, linear scales 31 and 32 in those grooves. Thus, it is easy to reduce the size of this linear motion rolling guide unit, it is able to flexibly accommodate the particular conditions of use, and it is also inexpensive.

Abstract: A position detection apparatus having a scale with resilient engaging portions that attach to a lower surface of the scale and engage insertion holes in a track rail into which fastening members are inserted for fixing the track rail to a bed. Also, a track rail unit that includes the position detection apparatus, and a guide unit that includes the track rail unit.

Abstract: The present invention discloses a positioning apparatus that, together with rotating an object (driven object), positions and guides said object to an arbitrary position within its rotating plane. This positioning apparatus can easily be made compact in size and its rotary motion is not restricted by a power supply cord and so forth. The above-mentioned effects are obtained by arranging a driving force generation device, more specifically a motor, which generates driving force to be applied to a linear motion table of a linear motion table mechanism, within the base portion of a rotary table mechanism.

Abstract: A ball spline bearing having a detection device which detects the relative positions and so forth of a spline shaft and outer cylinder by forming a plurality of narrow grooves 21c in spline shaft 21 and arranging extremely narrow and linear scales 31 and 32 in these grooves.

Abstract: A direct current motor drive apparatus generating low levels of heat is described. A pulse width modulation signal, generated by a pulse width modulator corresponding to a torque command signal, is applied to a Hall effect element. The Hall effect element then generates an output corresponding to the number of lines of magnetic force of a field magnet on the moving side. After this output is amplified by an operational amplifier, waveform shaping is performed by first and second comparators. The resulting signals are then amplified by first and second power amplifiers and supplied to excitation coils.Since waveform shaping is performed on the signal applied to each of the power amplifiers mentioned above, the power amplifiers operate in a region of roughly complete switching, thereby suppressing the generation of heat.