摘要:
A feedrate and travelling distance before the feed orientation of a feed drive axis is obtained by analyzing NC programs when carrying out a machining action, and the lost motion correcting quantity corresponding to said feedrate and travelling distance is calculated by using the relationship obtained in advance by experiments. Furthermore, the lost motion correcting quantity obtained by calculations is overlapped onto the instruction value to a servo motor which drives the feed drive axis, when the feed orientation of said feed drive axis is reversed.
摘要:
A plasma generator operable in the UHF and VHF bands is adaptable to process substrates having different sizes and shapes. The device includes a plurality of electrodes, a power supply for providing a high frequency signal to at least one of the electrodes, and antennas attached to the plurality of electrodes. Antennas on one electrode are arranged substantially parallel and alternately to antennas attached to another adjacent electrode.
摘要:
A woven fabric useful for air bags capable of smoothly opening in an initial stage of inflation and having a high burst strength and an excellent safety satisfies all the requirement that(A) a stress strain curve of the woven fabric in at least one of the warp and weft directions is a substantially downwardly convex curve, where the elongation .epsilon. is in the range: 1%.ltoreq..epsilon..ltoreq.20%;(B) where the elongation .epsilon. is in the range: .epsilon..ltoreq.10%, the tensile strength S(.epsilon.) of the woven fabric is 10 to 100 kg/3 cm in both the warp and weft directions; and(C) the woven fabric has a tensile toughness of 2,000 to 4,000 kg.%/3 cm in both the warp and weft directions, the tensile toughness being represented by an area of a region, in a graph showing a stress-strain curve of the woven fabric in each of the warp and weft directions, defined by the stress-strain curve and an abscissa corresponding to a stress of zero.
摘要:
An shock-absorbing air bag for an automobile or aircraft, has a high heat and flame resistance and satisfactory mechanical strength and comprises a high density woven fabric composed of warps and wefts each comprising (a) 0 to 90% by weight of thermoplastic synthetic fibers, for example, polyester fibers, having a denier or 5 or less and a Young's modulus of 1300 kg/mm.sup.2 or less, and (b) 10 to 100% by weight of heat resistant organic fibers, for example, aramid fibers, having a denier of 2 or less and a thermal decomposition temperature of 300.degree. C. or more, the woven fabric preferably having a high cover factor of 1900 or more.
摘要:
A scanning electron microscope is disclosed in which an objective lens includes a first pole piece and a second pole piece. The first pole piece is provided with a hole through which an electron beam passes, and is disposed between an electron gun for emitting the electron beam and the second pole piece. The second pole piece has a planar portion on which a specimen is placed, and the second pole piece being mounted on a supporting block movable in a plane substantially perpendicular to the projecting direction of the electron beam.