🎄⛄❄️🎁 It's beginning to look a lot like ADABOX-mas! The next ADABOX from Adafruit ships soon! Get yours now, or give as a gift! 🎄⛄❄️🎁
0

Using Acrylic Placement Stencils for Circuit Board Assembly #Manufacturing

stencil

James Bowman has come up with a technique even impressing Ladyada. He says:

PCB fabrication has changed a lot in the last couple of years, at least for me. Steel stencils, paste and reflow ovens used to be out of reach. Not any more! The construction steps for PCBs are:
  1. apply paste to PCB through stencil
  2. place parts by hand
  3. put it in a cheap IR reflow oven and press ‘start’
  4. go for a 7.5 minute walk

Hand placement works surprisingly well. Surface tension works to your advantage, centering the parts on their pads.

acrylic stencil

He’s been looking at ways of speeding up hand placement, especially for very small pitch parts. And found a great way:

It’s two acrylic sheets, sandwiched together. The lower is a frame for the PCB. The upper is a guide for the component placement. With the board pressed into the lower frame, the upper layer exactly places the larger components. Actually placing the parts is now laughably easy. The slots are precisely cut for each one, so it’s not even necessary to use a microscope. It’s possible to place 5 parts in a few seconds – not bad for a human!

After placement the PCB pops out of the frame leaving the parts firmly stuck in place in the paste. While this setup has been working really well for large parts, small components haven’t worked out — they tend to get lost in the holes in the acrylic.

You can check out his post which includes an Eagle script for converting a mnt file into an SVG file to cut out the acrylic.


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 14,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython 2019!

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — A radio tuned to one station, tells many stories about manufacturing electronics

Wearables — Pre-written code permission

Electronics — Calc that whip!

Biohacking — Vitamin-C + Gelatin for Accelerated Recovery

Python for Microcontrollers — A SuperCon was HaD! Arm AIoT Dev Summit is almost here, and more! #Python #Adafruit #CircuitPython #PythonHardware @circuitpython @micropython @ThePSF @Adafruit

Adafruit IoT Monthly — Helping Harry's Heart, CircuitPython meets AWS IoT and more!

Microsoft MakeCode — Lenticular Art Display with Crickit

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.