Electronics Forum | Fri May 08 08:12:32 EDT 1998 | Steve Gregory
| I am running a board that is .062" thick and has components that over hang the edge of the board by .090". I have bottom side smt components (chip caps and resistors only) and use the turbulent wave to help solder the components. The problem I am
Electronics Forum | Thu Feb 17 10:14:40 EST 2000 | Jim N
We bulid many boards with fine pitch on solder side and then wave. We use a wave fixture that is custom for each board. The fixture covers the SMT components and only exposes the PTH lead during the wave process. It requires about .070 to .100" clear
Electronics Forum | Fri Dec 17 09:24:46 EST 1999 | Marty Wetzel
KA, Joshua makes a good point. A wave solder fixture will allow you to process your double-sided boards without having to add the epoxy step. The one time fixed cost of a fixture is quickly offset by the time that you save by not gluing your SMT.
Electronics Forum | Wed Oct 27 17:59:54 EDT 1999 | John Thorup
How about some of the more rigid materials like the commercial fixture manufacturers use to machine solder/assembly fixtures from? Glastic, an anti-static version of Delmat and proprietary materials from MB manufacturing come to mind. Search the arc
Electronics Forum | Tue Dec 17 13:42:04 EST 2002 | robf
There are a few emerging technologies that have been growing in popularity for the past few years. Pin through paste, press fit connectors and selective soldering machines seem to be displacing custom fixtures. Most of the mixed technology boards o
Electronics Forum | Wed Sep 15 17:31:40 EDT 2004 | GS
Once you verified for correct profile ( consider CTE mismatch) make sure before you remove PBA from fixture, the temperature is almost at room temperature. If by removing PBA from fixture,and the PBA gets a little bent (warped) just in the area where
Electronics Forum | Tue Jan 03 15:16:53 EST 2006 | Cmiller
In circuit testing is expensive up front because of the fixture cost but the tests are fast. AOI programs can be develpoed in less than a day but take longer to run. If you have good test coverage, in circuit would be a better choice in my opinion-if
Electronics Forum | Fri Aug 03 12:31:43 EDT 2007 | jdengler
You probably do not have "Drift". The rotary table and or fixture may not be square. The rotary table can be adjusted. You should have someone who has done this before available to make the adjustment before you try it yourself. You can check the
Electronics Forum | Thu Feb 25 20:25:16 EST 2010 | dean
Good question, the answer as of right now is yes. Our machine is only able to go down to 0402 parts before the surface tension of the solder begins to cause issues with maintaining the placement position of the part on the nozzle. However, we are dev
Electronics Forum | Thu Aug 12 11:00:42 EDT 2010 | hegemon
Without seeing a picture, my first instinct would be first and foremost some fixturing that provides full support for your print process. After that, since you are citing bow and twist, consider that the fixturing might as well travel through the ov
