Since many people began to choose the Internet to watch and download movies and TV programs, the price of an expensive Blu-ray player began to fall sharply. However, do you know, in addition to scanning the CD and play the data of HD movies, the Blu-ray player's pickup (Pickup) actually has a powerful feature you imagine.
This includes applications in Diyouware's DiyouPCB open source PCB printers. Using blue pickups, DiyouPCB developers have created a method of making photosensitive dry films, and the photosensitive dry film is a material that is often used in printing PCB. This convenient film can be attached to the hot copper plate, and its price is less than $ 20, which is very economical and affordable for printing small circuit boards.
The Diyouware team transplanted throughout the system, including multiple components such as auto focus, laser oscillator, etc., including multiple components such as autofocus, laser oscillators, etc., including multiple components such as auto focus, laser oscillators, and the like to their PCB printers.
"In the first test, we replaced the DREMMEL of our CNC route with the laser diode removed from the blue pickup." The team said in the blog. "These laser diode is close to the ultraviolet band, but we are still enough to be sensitive dry film. We did some tests, it still had effect. The laser started" painting "on the film, but Still very rough, it may be because it is too large, or lacks focus. "
PHR-803T
Removed PHR-803T
After determining this problem, they have to continue to improve the functions of the laser, and the development team is actually not clear for how the Blu-ray pickup itself and how to better integrate its functions into their PCB printer design. And after attempting to communicate with Toshiba and fail, with limited technical information, their conclusion is that the principle of the Blu-ray pickup is similar to a standard CD laser pickup, and the development team will modify according to known things. To achieve its expected functionality.
"For us, we only need to turn on the laser, operate its energy and focus correctly on the PCB." The team said. "PHR-803T has a 0.5-pitch FPC connector with 45 pins. Just connection to the correct connection to the connector for a while. Finally, we designed a special interface board to easily" Smell the "signal."
After they get this PHR-803T, the development team designed a circuit to enable the user to control the laser. Specifically, the user can turn the laser, control strength, move the focus, and read the photodiode signal, and can perform autofocus.
First pickup drive prototype
In order to test their circuits and verify their design functions, the development team is installed on a REPRAP3D printer instead of the extruder with a pickup. They put a PCB covering the dry film in the print bed and conducted some tests. The results prove that this idea can be feasible, although some more improvements are needed.
When the function of the laser is debugged, it will enter the stage of preparing mechanical parts. The team uses common Arduino to drive the entire system, and other mechanical systems do not have obstacles.
"We think this printer will be based on a simple right coordinate machinery, two axes drive pickups on the X / Y plane." The development team added. "We are not in the size of the print area, because our stepper motor has sufficient motivation. No matter what the print area is big or small, we have chosen the area of 210 mm × 170 mm. Of course we have never created it. Big PCB board, but maybe you need it?
After some additional testing and correcting some issues (including the shape and quality, vibration and materials of the print line), the team finally manufactures the PCB printer.
"We use the first board manufactured by this printer is the drive PCB of its own pickup." Development team said. "We want to prove that PCB printers can print their own electronic devices. Self-replication again."
Pickup drive PCB
This is an open source design. The Diyouware team has released all the necessary files and information, including the necessary firmware for programming, for any interested person, to create your own DiyoupCB printer.
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