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SMD parts
The evolution of electronics manufacturing has led to parts drastically lowering in dimension over the previous few a long time, and for automated PCB assembling, these components come packaged in tape. Ordinarily, this presents no points, as giant rolls of tape are scanned after which positioned into robotic pick-and-place machines. Nonetheless, hobbyists who buy a lot smaller portions of floor mount components can run into hassle when trying to maintain monitor of values, akin to sustaining separation between ceramic capacitors.
In response to this problem, Yvo de Haas (who goes by ytec3d) created a small machine that accommodates an HP45 printhead and a motor as a way to mechanically label parts that come packaged in SMD tape.
The parts
de Haas’ printer relies round his customized HP45 controller module that he designed. It contains a Teensy 3.5, which communicates with the host pc over USB to drive each the printhead and different exterior parts. The controller board is powered from a 12V supply by way of a jack, so it will probably additionally drive a motor. And at last, encoders and switches could be hooked up for gathering positional information to help in motor actions.
On the software program aspect of issues, de Haas got here up with a customized program which he calls “Inkjet Commander”. This Python-based program’s position is to open communication with the HP45 controller, initialize it, and ship photos to print. It might probably keep full management over the HP45 printhead, run diagnostics, configure encoders and different pins, and even ship direct serial instructions to the controller.
Assembling the printer
The SMD tape printer was designed to be totally 3D-printed whereas utilizing little in the way in which of additional {hardware} akin to screws. After fabricating the components, de Haas started by attaching two small toes to the bottom, which homes the motor slightly below its prime floor. Subsequent, the highest plate was added together with a change that tells the controller if a tape has been loaded. The sprocket was positioned on the entrance of the machine in order that it will probably barely poke above the plate and feed the tape by means of the machine. Lastly, the tape guides and inkjet meeting have been mounted to the highest of the plate, in addition to an extra microswitch that’s activated when the inkjet is in place.
Printing onto tapes
With the printer now assembled, de Haas opened his Inkjet Commander utility and loaded the primary picture to be printed: a 1.2kOhm label for the tape of SMD resistors. When it comes to settings, he went with a printing velocity of 80mm/s, a 300 dots-per-inch density, and used the primary exterior pin to set off printing whereas it’s depressed.
As seen in his video, this printer labored very effectively at making use of a clear layer of ink to the again of the tape whereas sustaining a relentless velocity. When mixed with the flexibleness of the customized software program, the printer has some severe capabilities. You’ll be able to learn extra about this undertaking right here on de Haas’ web site, and his demonstration video could be discovered right here on YouTube.
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