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Used SMT Equipment | Screen Printers
We have (3) screen printers for sale, $100 each. These are not currently working, so they're being sold for spare parts only. MPM UP100/B, Mfg. Date 1/10/2002: The control boards have problems, so we stopped using the printer. This printer wo
Used SMT Equipment | Screen Printers
We have (3) screen printers for sale, $100 each. These are not currently working, so they're being sold for spare parts only. MPM UP100/B, Mfg. Date 1/10/2002: The control boards have problems, so we stopped using the printer. This printer wo
Used SMT Equipment | Screen Printers
We have (3) screen printers for sale, $100 each. These are not currently working, so they're being sold for spare parts only. MPM UP100/B, Mfg. Date 1/10/2002: The control boards have problems, so we stopped using the printer. This printer wo
Used SMT Equipment | Screen Printers
We have (3) screen printers for sale, $100 each. These are not currently working, so they're being sold for spare parts only. MPM UP100/B, Mfg. Date 1/10/2002: The control boards have problems, so we stopped using the printer. This printer wo
New Equipment | Test Equipment
FLIR A320 Thermal Imaging $11,950.00 Resolution, Plug & Play Infrared Camera for Machine Vision The FLIR A320 Infrared Camera is an affordable and accurate solution for machine vision and automation systems that require non-contact imaging and te
Parts & Supplies | Chipshooters / Chip Mounters
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New Equipment | Test Equipment
The FLIR E4 Thermal Imaging Camera is ideal for electrical and mechanical preventative maintenace applications in determining faults in areas normally very dififficult to find. They take pictures of the heat signature of the subject, thus eliminating
Technical Library | 2024-04-29 21:39:52.0
In this paper, we develop and put into practice an Automatic Optical Inspection (AOI) system based on machine vision to check the holes on a printed circuit board (PCB). We incorporate the hardware and software. For the hardware part, we combine a PC, the three-axis positioning system, a lighting device and CCD cameras. For the software part, we utilize image registration, image segmentation, drill numbering, drill contrast, and defect displays to achieve this system. Results indicated that an accuracy of 5µm could be achieved in errors of the PCB holes allowing comparisons to be made. This is significant in inspecting the missing, the multi-hole and the incorrect location of the holes. However, previous work only focusses on one or other feature of the holes. Our research is able to assess multiple features: missing holes, incorrectly located holes and excessive holes. Equally, our results could be displayed as a bar chart and target plot. This has not been achieved before. These displays help users analyze the causes of errors and immediately correct the problems. Additionally, this AOI system is valuable for checking a large number of holes and finding out the defective ones on a PCB. Meanwhile, we apply a 0.1mm image resolution which is better than others used in industry. We set a detecting standard based on 2mm diameter of circles to diagnose the quality of the holes within 10 seconds.
