摘要:
In the present invention, through the provision of a tray placing rack for storing trays in multi steps, the trays accommodating electronic parts after inspection are received in the racks and through the provision of a tray stacking rack above the tray placing rack, an empty tray emptied by having been inspected of the electronic parts before inspection at an inspection stage is stacked on the tray stacking rack. When a certain tray is filled with electronic parts after inspection and is discharged, an empty ray is taken out from the tray stacking rack and the empty tray is fed to the rack position of the discharged tray to permit re-use of empty trays
摘要:
An upward warp of a terminal pad of a flexible cable which is kept horizontal by a suction head is prevented by a pressing arm which contacts with an upper surface of a rear portion of the flexible cable.
摘要:
At time to start learning feed-forward control and under the status that servo-drive is not put in execution, a positioning error of repeatable runout is detected by means of a positioning error of repeatable runout operation section and on the basis of a value of the positioning error of repeatable runout, a drive pattern and drive interval of idling are determined by means of a feed-forward data operation section. The drive pattern is stored in a feed-forward data memory and is outputted as feed-forward data in synchronism with the rotation of a spindle during drive interval, thus performing idling of a fine-movement actuator. After the idling has ended, control initiation sequence is resumed to carry out learning of feed-forward control.
摘要:
A magnetic head-positioning system to accurately test a magnetic disk and a magnetic head, comprises a plurality of hinges attached on an end portion of a linear driving element and disposed on both sides of a center line of the linear driving element, which is in parallel with an extension-shrinkage direction of the linear driving element, and an arm having a length longer than a distance between a plurality of hinge joint portions, the plurality of the hinge joint portions each of which join the hinge with a root portion of the arm and which are disposed on both sides of a center line of the arm which is in parallel with a longitudinal direction of the arm. The arm has an extremity portion on which a head gimval assembly is detachably attached and this head gimval assembly is positioned.
摘要:
A magnetic head-positioning servo system is provided to accurately test a magnetic disk with a track written in advance, by providing two fine actuators. The second fine actuator, to which a magnetic head is attached, is mounted on the first fine actuator. The second fine actuator has a larger generating displacement than a generating displacement of the first fine actuator, and lets the magnetic disk to follow the eccentricity of the track. In this way, the positioning accuracy can be increased.