Electronics Forum | Tue Jul 17 11:08:47 EDT 2007 | jdumont
Morning all, I have been tasked with finding a semi automatic placer for our engineering dept to run 1-5 piece prototypes on. Vision capabilities are necessary. Can anyone help steer me in the right direction for this... Nothing exotic would be place
Electronics Forum | Thu Jul 24 22:37:06 EDT 2008 | davef
As part of the IPC-4552 specification testing, they ran ENIG at 2 uinches for 1.5 million cycles for a membrane-type keypad application [there was no testing for the wiping-type switches]. They stopped testing when the membrane began breaking down. T
Electronics Forum | Tue Sep 16 16:55:51 EDT 2008 | rayjr1491
I am a doer myself but with the turn around and cost on EFORM stencils I prefer to be right and starting with math is always the best way. We have played with reducing apertures even stencil thickness as low as 4 mil. On the side that this component
Electronics Forum | Tue Sep 16 17:56:36 EDT 2008 | slthomas
"....over 3500 apertures in a circuit that is about 1 x 1.5 inches..." 8O Yeah, Larry would definitely be the go-to on this one. :P I would think reducing stencil thickness would be your best bet to avoid that ratio problem, but how durable is a .
Electronics Forum | Mon Jul 20 04:37:23 EDT 2009 | jdumont
We have used some sealed steel cabinets and a nitrogen generator (Balston 75-79 model) for about a dozen years with no issues at all. Humidity levels average 1% - 5%. We also just bought a couple of XDry (Totech) desiccant cabinets (XD2-1104-02) for
Electronics Forum | Wed Dec 08 19:16:20 EST 2010 | jgalarza
Can anyone tell me if there is a formula for finding the after reflow height of solder with no part attached? I have to print some pads that do not have any parts but there can not be more than 1.5mil of solder on the pad after reflow. I am going to
Electronics Forum | Fri Jun 22 08:32:35 EDT 2012 | rway
Just my two cents, but when we invest in capital equipment, we look for an ROI of 2 years or less. This is our benchmark. One of the posters is correct though about factoring in insurance and other benefits into the hourly wage. We use 1.5 X hourly
Electronics Forum | Fri Jun 15 08:00:08 EDT 2012 | deanm
ENIAC, 0.040" equates to 1mm, not 0.1mm. 0.040" is the IPC minimum recommended fiducial size and when we started putting fiducials on our boards I assumed that all equipment manufacturers should be able to automatically spot that size. Since then I'v
Electronics Forum | Mon Jul 11 13:21:40 EDT 2016 | bradholland
well there you go. I found that trying different values in the "Placing Stroke" had a big effect. I changed it to 2mm and it placed them well, but I could see the board also flexing a little, went to 1mm and the problem came back, so have sat in th
Electronics Forum | Thu Mar 08 09:41:23 EST 2018 | reckless
We currently contract our stuff out. I'm hoping to bring it back in. New machines are over $100k. If a used machine exists for $10-15k I'm open to it. I believe my job is simple other than 1 5mm QFN
