• Kiran Patil
• Akshay Nighot
• Nilesh Chandgude
• Govind Badgujar.

Advanced precision machinery, from centrifuges to computer disk drives, rely on precision bearing and spindle assemblies for high performance. The spacing of data tracks on a computer disk drive can be limited by the non-repeatable runout of the spindle bearing assembly. For reasons like these, the need to measure runout and diagnose its cause has increased in recent years. Traditionally, runout has been measured with the electronic equivalent of a dial indicator and oscilloscopes which can determine the magnitude of runout. More recently, spectrum analyzers have been used, because they can help identify the various causes of runout by providing the frequency distribution information, as well as the data available from other testing methods. Originally confined to design labs, spectrum analyzers are now finding their way into incoming inspection and onto the manufacturing floor, where they are used to measure changes in runout caused by critical assembly steps. This paper explores the advantages of using a dynamic signal analyzer to make runout measurements; using both the traditional time domain measurements, as well as spectrum measurements. The measurements shown were made on a disk memory spindle assembly. Also the correlation between the time domain NRR measurement and the asynchronous runout measurement is also discussed.

time domain measurements, frequency domain measurements, dynamic signal analyzer

"DETERMINATION OF PERFORMANCE LIMITATIONS OF CD DRIVE FOR NRR USING DIGITAL SIGNAL ANALYSIS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.52-55, March-2019, Available :http://www.jetir.org/papers/JETIRAH06008.pdf

"DETERMINATION OF PERFORMANCE LIMITATIONS OF CD DRIVE FOR NRR USING DIGITAL SIGNAL ANALYSIS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp52-55, March-2019, Available at : http://www.jetir.org/papers/JETIRAH06008.pdf