Abstract: A disk drive capable of determining the diameter of the currently loaded disk in a short time without the use of additional attachments such as optical sensors. Servo gains are first set to permit rotation of a 12-cm CD, and the servo is turned on. The CD is rotated at a steady rotational speed regardless of its diameter. The servo is turned off when a sub-code synchronizing signal is detected from the CD. Acceleration pulses are generated to start accelerating the spindle motor simultaneously with the starting of a timer. The timer is stopped when the next sub-code synchronizing signal is detected, and the servo is again turned on. If the value on the timer is longer than a reference time, the loaded CD is found to be a 12-cm CD and the appropriate servo gains are set for the 12-cm CD; if the timer value is shorter than the reference time, the CD is found to be an 8-cm CD and the servo gains are set accordingly.

Abstract: An apparatus for inserting into a hollow carton a partition lattice which is assembled from slitted longitudinal partition panels and slitted transverse partition panels by placing the slitted portions of the partition panels over one another to produce a lattice-like assembly of partitions. The apparatus has a feeder for feeding folded partition lattices over-lapping one on the other in a vertical state onto a table, towards the front end of said table, a device for opening the folded partition lattices, a lifting means at the front of the opening device for lifting the opened partition lattice as the lifting means rises, a transfer means for transferring the lifted partition lattice to a position right above a hollow carton waiting to receive the partitions, a means for inserting the partition lattice into the carton and for releasing the partition lattice from the transfer means.