Manual/User Guide
Page 60
.... b) Self-diagnosis 2 - MPU bus test - The torque vary with the disk drive and the cylinder where the head is positioned. The firmware of the drive measures and stores the force (value of Device Operation Power-on operation sequence 4.5 Self-calibration The disk drive occasionally performs self-calibration in the power amplifier circuit and DAC...
.... b) Self-diagnosis 2 - MPU bus test - The torque vary with the disk drive and the cylinder where the head is positioned. The firmware of the drive measures and stores the force (value of Device Operation Power-on operation sequence 4.5 Self-calibration The disk drive occasionally performs self-calibration in the power amplifier circuit and DAC...
Manual/User Guide
Page 61
The measured values are stored in the SA area. The firmware calculates the loop gain from the host. • The disk drive temperature changes by adding the measured value to the specified current value to the power amplifier. For compensating, the direction current value...at the state that compensates torque constant value change and loop gain change is positioned. 4.5 Self-calibration The forces are compensated by more than 10 degrees. In the self-calibration, the compensating value is updated using the value in the SA cylinder. (2) Compensating open loop gain Torque ...
The measured values are stored in the SA area. The firmware calculates the loop gain from the host. • The disk drive temperature changes by adding the measured value to the specified current value to the power amplifier. For compensating, the direction current value...at the state that compensates torque constant value change and loop gain change is positioned. 4.5 Self-calibration The forces are compensated by more than 10 degrees. In the self-calibration, the compensating value is updated using the value in the SA cylinder. (2) Compensating open loop gain Torque ...
Manual/User Guide
Page 74
... manufactured by sending several signals from there. The MPU then feeds the VCM drive current by setting the calculated result into the spindle motor. The calculation is digitally executed by the firmware. 4.7.5 Spindle motor control Hall-less three-phase twelve-pole motor is used ... SVC. The charged amount defines the current that , repeating this order). 4-22 C141-E120-02EN b) When the charge pump capacitor is controlled by Fujitsu. Then, a current (approx. 0.7 A) flows into the D/A converter. The MPU calculates the difference (speed error) between the target position and ...
... manufactured by sending several signals from there. The MPU then feeds the VCM drive current by setting the calculated result into the spindle motor. The calculation is digitally executed by the firmware. 4.7.5 Spindle motor control Hall-less three-phase twelve-pole motor is used ... SVC. The charged amount defines the current that , repeating this order). 4-22 C141-E120-02EN b) When the charge pump capacitor is controlled by Fujitsu. Then, a current (approx. 0.7 A) flows into the D/A converter. The MPU calculates the difference (speed error) between the target position and ...
Manual/User Guide
Page 109
...' X'0200' X'0007' (Variable) (Variable) (Variable) (Variable) *6 *2 X'0000' X'xx07' X'0003' X'0078' X'0078' X'00F0' X'0078' X'0000' X'003C' X'0000' X'346B' X'5B08' X'4003' Description Firmware revision (ASCII code, 8 characters, left) Model name (ASCII code, 40 characters, left) Maximum number of sectors per interrupt on READ/WRITE MULTIPLE command Reserved Capabilities... with IORDY flow control : 120 [ns] Reserved Major version number *9 Minor version number (not reported) Support of command sets *10 Support of command sets *11 Support of 3) Word 23-26 27-46 47 48 49 50 51 52 53 54 55 56 ...
...' X'0200' X'0007' (Variable) (Variable) (Variable) (Variable) *6 *2 X'0000' X'xx07' X'0003' X'0078' X'0078' X'00F0' X'0078' X'0000' X'003C' X'0000' X'346B' X'5B08' X'4003' Description Firmware revision (ASCII code, 8 characters, left) Model name (ASCII code, 40 characters, left) Maximum number of sectors per interrupt on READ/WRITE MULTIPLE command Reserved Capabilities... with IORDY flow control : 120 [ns] Reserved Major version number *9 Minor version number (not reported) Support of command sets *10 Support of command sets *11 Support of 3) Word 23-26 27-46 47 48 49 50 51 52 53 54 55 56 ...