An Isolator for a Disk File Voice Coil Motor
Original Publication Date: 1988-Oct-01
Included in the Prior Art Database: 2005-Feb-16
In high performance magnetic recording disk files, the reactive forces from the voice coil motor (VCM) actuator may excite undesireable resonant frequencies in the base plate to which the disk drive spindle is also attached. The usual solution to the problem is to isolate the VCM on shock mounts. However, this does not completely solve the problem, because the carriage, which is attached to the moving coil of the VCM, must be mounted on a system that is rigidly and accurately maintained relative to the disks, while the magnet assembly of the VCM must utilize very soft elastomers to provide low frequencies for effective damping. The magnet assembly may then sag to the extent that will allow it to drag on the carriage because internal clearances in the VCM are very small.