Electronics Forum: side dams (Page 1 of 4)

PCB wave dams

Electronics Forum | Fri Feb 27 15:48:13 EST 2004 | pdeuel

Dose anybody know of a method of preventing board sag in the wave process. We have a 2 year old Deltawave. The product we are running is a one sided 10in x 12in panel of 6 PCB's. Pin headers and connectors are near all of the edges. Our current board

Which side of PCB should be prefered for screening...

Electronics Forum | Tue Sep 18 18:36:59 EDT 2001 | mparker

... and don't forget proper stencil alignment. Invariably I find most bridging problems for fine pitch parts, etc. is caused by lousy alignment. The alignment must be verified under magnification, using the naked eye is not good enough. Use at least

Re: Ghost circuit shorts under smt resisters only when they are located on solder side of pcb (glued down)

Electronics Forum | Mon Jul 26 14:14:51 EDT 1999 | Steve Gregory

| | | We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. | | | The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is th

DPAK's sliding off pad during reflow

Electronics Forum | Tue Aug 11 09:48:22 EDT 2015 | samputrah

We have had two jobs that have the same issues with DPAK's sliding off their pads during reflow. We tried to resolve this by placing epoxy on the side of the component to create a "dam". However this is not repeatable enough to be a quality resolutio

Acceptable level of defects for Wave Soldering

Electronics Forum | Wed Sep 15 23:15:55 EDT 2004 | pdeuel

Im with Pete, Zero defects. We have high defect rate for many reasons. No line tech, operators set up and run then when QA reports defects engneers are called. Not to make people mad but our process engneers are lacking practical experance to fix pro

Rheometric Pump - Yes or No???

Electronics Forum | Mon Jun 27 10:25:29 EDT 2005 | Paul

Hi Erik, looks like there's not much appetite for this debate on this forum. Possibly because not many use them and aren't in a position to confirm or deny what we know. We use our pumps 6 days a week, 24hrs a day so it's a very dynamic proc

AP 25Hie

Electronics Forum | Mon Jan 12 18:40:32 EST 2004 | fastek

You don't want dedicated tooling. Make sure your machine comes with front and rear dams and plenty of side chucks and magnetic support pins. The best option for these machines is the side snugger option but it doesn't sound like your machine has that

solder paste

Electronics Forum | Wed Jul 27 09:58:05 EDT 2011 | davef

Pressure printing systems Conventional stencil printing techniques have fundamental limitations as regards paste handling: The volume of paste available for printing is limited, so frequent replenishment is necessary Paste is difficult to c

Potting/Conformal Coating

Electronics Forum | Thu Feb 25 14:52:52 EST 2016 | tombstonesmt

How thick are their requirements? A barrier can be made using peelable latex. That would then require manual or automatic dispense of latex to create a dam. Then you should be able to use an automated dispense system with a large orifice and flood

Re: Intrusive reflow..from the bottom..????

Electronics Forum | Fri May 21 15:29:26 EDT 1999 | JohnW

Joe.. Sound's pretty neat trick..mind if I ask what type of comp's are on this board and the paste..? This baby (pig I think) has got a 244pin QFP right dam in the middle..!, so if ur flipin it 180 degree's are u using like a piece of Jot in line co

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