Differences

This shows you the differences between two versions of the page.

--- mdcpickandplace:tips [2009/10/29 18:59]
ladyada created
+++ mdcpickandplace:tips [2016/01/28 18:05] (current)
@@ Line 1: / Line 1: @@
-====== PCB Stencils ======
+===== PCB Stencils =====
+Unless you get a dispenser module add-on, you'll need to silkscreen / screenprint solder paste onto the PCBs. Most PCB stencils are made of stainless steel and last years. Right now [[http://ladyada.net/wiki/laserinfo/pcb_stencils|we make our stencils out of kapton (polyamide) with a laser cutter]]
+You can also get this done for you as a service from [[http://www.pololu.com/catalog/product/446|Pololu]], or [[http://www.ohararp.com/Stencils.html|Ohararp]] It should be $20 or so for a small sheet.
+===== Digi-Reels =====
+Say you want to make 100 accelerometer boards (using the ADXL335) but you're not keen on buying 2000 pieces that make up a full reel. You could try to go with cut tape (hassle) //or// you can go with a "[[http://dkc1.digikey.com/US/EN/help/DigiReel.html|digi-reel]]". This is a service offered by [[http://www.digikey.com|Digikey]] where they will take a piece of cut tape and add a leader (long piece of 'empty' tape) and footer  so that you can mount it on a pick and place. Its kind of brilliant, and costs only $7 on top of parts cost. You can also make your own, of course, by saving old tape.
+===== Sticky tape =====
+Test your parts placement by laying down double-sided sticky tape onto a PCB. It'll keep the parts in place without the mess of paste
+===== Nozzle sizes =====
+Use the biggest nozzle you can to pick up parts. The bigger the nozzle, the less slipping you'll get

AdaWiki

User Tools

Site Tools

Differences

Page Tools