Electronics Forum | Wed Jan 29 16:14:16 EST 2003 | blnorman
One of the safest ways to dispose of urethane conformal coating waste is to cure it. Once it's cured it no longer is considered a hazardous waste. In the uncured state it is. We have tubes of epoxy adhesives (out of shelf life) that we do the same
Electronics Forum | Thu Jan 30 07:27:00 EST 2003 | cnotebaert
As said earlier the best way is to cure it then discard. Is your material heat cure or moisture cure? If heat cured and you ahve a oven place the material in trays and heat cure and discard. If moisture cure leave the material in the container and ad
Electronics Forum | Wed Jan 29 17:19:50 EST 2003 | albertoh
Hello!! I need to know the land pattern specs for a melf resistor with dimensions length 0.415(+/-0.02) and width 0.144 (+/-0.008) inches. Because i have tombstone problem. My stencil design is 10 mils thickness in order to avoid the issue but it hel
Electronics Forum | Thu Jan 30 14:37:45 EST 2003 | davef
NASA-STD-8739.1 , Workmanship Standard for Staking and Conformal Coating of Printed Wiring Boards and Electronic Assemblies, says words to the effect of : 10.1 Purpose Conformal coatings are intended to provide electrical insulation and environmental
Electronics Forum | Fri Jan 31 13:37:22 EST 2003 | MA/NY DDave
Hi Hopefully someone else will add more. The IPC has some patterns on this topic so you might wish to check their literature. Scoring is another technique. You are pretty thick at .135 so you want to make the drill hits as close as possible, and y
Electronics Forum | Sat Feb 01 16:11:24 EST 2003 | Paul Smith
I would suggest scoring if the profile allows, leaving residual material of circa 40 - 50 mil - That is what I do on a 125mil thick PCB width of the pis is approx 200 mil Mouse bites on a board as thick as 135 mil will mean its extremly difficult to
Electronics Forum | Mon Feb 03 14:31:19 EST 2003 | Stephen
We use a Mighty Mutt machine. Not 100% sure of spelling. It works well for us. It has a metal vaccuum tube and heated metal wires, and is grounded. I used to work for a company that used a sandwich bag sealer. That was not good at all. If you buy
Electronics Forum | Wed Feb 12 10:03:47 EST 2003 | stefwitt
Greg, you pointed out yourself the many advantages of bulk feeding. I would like to mention that the higher component accuracy and the feeding track accuracy of the bulk feeder contribute to an improved pick failure rate of small ( 0402�s ) component
Electronics Forum | Fri Feb 21 10:03:43 EST 2003 | genny
Sure they'll do it...If you're willing to pay double or triple the cost. It might not be as easy as you think. the value is usually marked in white over the black carbon area that actually is the resistor. Underneath is just the white ceramic carr
Electronics Forum | Fri Feb 21 14:20:56 EST 2003 | jseagle
Has anyone actually seen 0402 or 0201 part with the value on it? I haven't. So what would be the big deal if these parts are placed upside down. The only difference I have noticed is usually on a resistor one side is black and the other is white an
