| Author | Montree Jittasinnawa |
| Call Number | AIT Thesis no.ISE-13-25 |
| Note | A thesis submitted in partial fulfillment of the requirements for the Degree of Master of
Science in Mechatronics, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis; no.ISE-13-25 |
| Abstract | A Hard Disk Drive (HDD) consists of many components such as, magnetic recording head,
magnetic recording disk, motor base, ramp, voice coil magnetic, top cover, and screw. In the
HDD manufacturing process, any HDD that fails to meet assembly criteria, visual inspection
criteria or quality tests will be moved to teardown process to separate each component and
reuse for cost saving purposes. Screw is one of the HDD components that used the most.
After the teardown process, these screws will be inspected before reusing with other HDDs if
they still meet the inspection criteria.
The screw sorting machine is equipment for screw inspection using an optical
microscope to inspect the screw threads (side view) and the screw head and screw recess (top
view) with high speed unit per hour. The current problem of the screw sorting machine is
over rejection rate and escaped defect screws. Top view inspection at the screw recess is the
major failure mode. Therefore, the recess inspection needs to be improved for more accuracy.
This thesis is focusing on improving the accuracy and proper control of the screw
sorting machine by adjusting the machine’s visual inspection parameters. Design of
Experiment (DOE) is used to achieve the best parameter setting and then applied to the screw
sorting machine. The setting accuracy is proved by capturing screw recess images and
analyzed by image processing software. |
| Year | 2013 |
| Corresponding Series Added Entry | Asian Institute of Technology, Thesis; no.ISE-13-25 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Industrial Systems Engineering (DISE) |
| Academic Program/FoS | Microelectronics (ME) |
| Chairperson(s) | Afzulpurkar, Nitin V.; |
| Examination Committee(s) | Mongkol Ekpanyapong;Hoang hung manh;Piched Lainananukul; |
| Scholarship Donor(s) | Western Digital;NECTEC, Thailand;Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2013 |