Disk Drive Head Load Testing
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-05
Diskette read/write heads are loaded against a rotating flexible diskette when a control logic circuit activates an output line. The logic circuit operates to load the heads repeatedly at a previously selected circumferential position, or to distribute the load positions evenly around the diskette circumference depending on the mode selected. This increases the capability of test equipment which is used to test the wear characteristics of flexible diskette media and diskette drive heads. The figure is a logic circuit composed of multi-stage switch 4, binary counters 1, 2 and 3, AND gates 5 and 6, and OR gate 7. The input signal 8 (Fixed) is activated when a fixed point load is desired, and will serve to enable switch 4, counter 3, AND gate 5, and OR gate 7.