Electronics Forum: 4.4 (Page 1 of 5)


Electronics Forum | Tue Jun 26 21:41:10 EDT 2007 | davef

4.4 Determine the amount of flux on the board. 4.4.1 Get a piece of corrugated cardboard and a weighing scale accurate to 0.01 grams. NOTE: Use cardboard with alcohol fluxes to slow their evaporation and get good data. 4.4.2 Weigh the cardboard. 4.4

Gold coated spring contacts

Electronics Forum | Tue May 22 18:21:15 EDT 2001 | davef

Again not quite what your looking for, but close, consider IPC-2221, Generic Standard On Printed Board Design, Para. 4.4.4 for minimum requirements for edge board connectors, as a baseline.

manual stencil print 2 passes

Electronics Forum | Wed Dec 24 20:11:43 EST 2008 | xianhua_tang

hi,brettc! Our stencil openings no more than 4mm * 4mm, you have a larger component of the pads is more than a 4*4? At the same time, with the thickness of the stencil, I would like to increase the printing speed can be improved to reduce the thickne

Looking for a high quality HDI PCB house

Electronics Forum | Mon May 04 10:49:55 EDT 2015 | scott00

Thomas, I know a HDI PCB house from China,They manufactured some high complex HDI jobs for me,some HDI pcbs are 10L(3+4+3),(4+2+4),and 12L(4+4+4),and some HDI pcb jobs are 2/2mil min trace width/space,the quality are very nice,you can make a try.t

Solder wave

Electronics Forum | Mon May 07 11:09:49 EDT 2007 | davef

4 Fluxer Operation 4.1 Set-Up and Check-Out the Fluxer 4.1.1 Spray Fluxer Set-Up and Check-Out Pass a sample unsoldered board through the machine. Remove the board just after passing through the fluxer and the air knife.

warpage dtandard

Electronics Forum | Sun Aug 24 08:57:56 EDT 2008 | davef

For an nate measurement method, look here http://www.ipc.org/4.0_Knowledge/4.1_Standards/test/2.4.22c.pdf For bare boards, look to IPC-6012, par. 3.4.4 For assemblies, look to IPC-A-610

Gold coated spring contacts

Electronics Forum | Tue May 29 20:22:19 EDT 2001 | davef

Well, no fault with your calculations from here. They appear to be correct. [Logic doesn't appear to be off to far off base, either. An epiphany, eh?] As mentioned in an earlier posting on this thread, consider following the recommendations of IP

Siemens Siplace S15 Operating

Electronics Forum | Mon Mar 06 13:00:37 EST 2006 | global

We have a Siplace S15 and I would like to know if it is possible to make it skip a part during the placement operation with out aborting the job? In section of the user's manual it describes how to set a track to empty and proceed on with the

quad 4c autoprogram

Electronics Forum | Mon Mar 06 20:50:47 EST 2017 | arachid

Hi, I get a old pick and place machine quad 4c. I don't have manuel for autoprogram. i think version 4.4. anybody know where I can find it? Thanks

Image Intensifier for X-Ray

Electronics Forum | Fri Dec 19 16:51:05 EST 2003 | Todd La Marche

Hi Marco, Possibly I can help you. What is the spec for this II? Is it 6", 4", 4/2". If you can give me this data, I am sure that I can get you one. Todd

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