Abstract: Methods and mark verification systems for evaluating the quality of a two-dimensional matrix dot peen mark on an object are provided. An exemplary embodiment of the methods includes scanning a two-dimensional matrix dot peen mark disposed on a surface of an object with a laser displacement sensor to generate three-dimensional scanned data for the mark, the mark including a plurality of dots disposed in a plurality of rows and columns on the surface; and determining whether the mark passes a verification test based on the scanned data.

Abstract: Methods and mark verification systems for evaluating the quality of a two-dimensional matrix dot peen mark on an object are provided. An exemplary embodiment of the methods includes scanning a two-dimensional matrix dot peen mark disposed on a surface of an object with a laser displacement sensor to generate three-dimensional scanned data for the mark, the mark including a plurality of dots disposed in a plurality of rows and columns on the surface; and determining whether the mark passes a verification test based on the scanned data.

Abstract: A head stack assembly installation system with a frame supporting a head stack installation tool including a robotic assembly supporting a measurement assembly communicating with a computer hosting an installation software program. The robotic assembly picks and places the head stack assembly into the head disc assembly and the measurement assembly collects and communicates process positions and force parameters to the computer, the computer calculating distance and force data. The installation software program directs and controls enactment of process steps followed by the head stack installation tool to install or abort installation of the head stack assembly based on the position and force data.

Abstract: The present invention provides a computer directed head stack assembly installation system with an installation software stored on recordable media directing the controlling a sequence of head stack installation assembly steps executed by a robotic assembly to pick and place a head stack assembly into a basedeck. The installation software program monitors compliance of the placement operation regarding mechanical resistance encountered by the head stack assembly engaging the basedeck compared to a dynamic force threshold F determined by the equation [F=(f(p)+/?x)] and against the dynamic slope V determined by the equation [V=V=(fn?fn?1)/(pn?pn?1). Upon successful installation of the head stack assembly into the basedeck forming the head disc assembly, the head disc assembly is released from the head stack assembly installation station.

Abstract: Method for controlling installation of a head stack assembly in a disc drive. The head stack assembly is aligned in a head stack installation tool. A base deck assembly is advanced to the head stack installation tool, the base deck assembly having a post supporting a tolerance ring. A robotic assembly is dispatched to pick and press the head stack assembly onto the tolerance ring and post while mechanical resistance and distance traveled parameters by the head stack assembly are measured. The installation is aborted or completed in relation to the mechanical resistance encountered and the distance traveled, thus allowing use of minimum and maximum force thresholds with respect to insertion distance and assuring correct installation of the head stack assembly.

Abstract: A head stack assembly installation system with a frame supporting a head stack installation tool including a robotic assembly supporting a measurement assembly communicating with a computer hosting an installation software program. The robotic assembly picks and places the head stack assembly into the head disc assembly and the measurement assembly collects and communicates process positions and force parameters to the computer, the computer calculating distance and force data. The installation software program directs and controls enactment of process steps followed by the head stack installation tool to install or abort installation of the head stack assembly based on the position and force data.

Abstract: A disc slip tester for testing disc slip. The tester including a load actuator and load sensor for supplying and measuring test loads. A processor is coupled to the load sensor and is programmed to determine disc slip. Disc slip data is outputted for quality control and performance analysis. A method for analyzing disc slip including supplying a load to a disc in a disc stack and incrementally measuring load and disc displacement and plotting the relationship between load and displacement during test operations.