Electronics Forum | Wed Aug 09 10:51:22 EDT 2017 | cbeneat
I have a question for the experts. After a panel is printed, how long is too long for the panel to sit prior to reflow? I understand each paste will be different, wondering if there is a general rule of thumb?
Electronics Forum | Wed Dec 30 09:47:52 EST 1998 | Paul M
Hi All, I work with CNC Routers . I use full perimeter routing of double sided populated panels, in a high volume/ mix application environment. We chose stand alone routing machines for our facility . I'm interested in your input for better ideas
Electronics Forum | Mon Jul 13 11:33:54 EDT 2020 | spoiltforchoice
Well obviously the answer is yes. Most people would probably do it in their CAD package. If you want to use a third party tool Fab3000 does tis as well as a whole bunch of other things you might possibly want to do when processing files supplied by o
Electronics Forum | Wed Aug 09 12:34:54 EDT 2017 | jdengler
It also varies with the types of deposits. Small deposits of paste (as seen on fine pitch parts or small chips) seem to be more affected by exposure. Jerry
Electronics Forum | Thu Aug 10 11:32:34 EDT 2017 | dleeper
You could always take a scrap board, paste it, and let it sit out over night. Reflow it and then you should have a nice visual aid, covered in solder balls and grainy, irregularly shaped solder mounds.
Electronics Forum | Tue Aug 15 07:27:03 EDT 2017 | emeto
Most important factor - temperature. Back in the days I worked for a place without AC, and summer time this paste couldn't make it for more than an hour. In controlled environment you will be safe for hours or even a shift.
Electronics Forum | Wed Aug 19 13:03:17 EDT 2020 | esoderberg
Take a look at Viewmate. Its free and allows to evaluate, measure, etc any gerber file
Electronics Forum | Mon Jul 13 08:36:56 EDT 2020 | autisndong
Is there any tool or process you would recommend that can take a standard stack of Gerber files (usually 2-layer, although the potential capability to support 4-layer would be nice) and bring them all together into one set of Gerber files on a combin
Electronics Forum | Wed Aug 09 11:59:19 EDT 2017 | dleeper
As you already know, it depends on the paste. There isn't really a rule of thumb, but less time exposed it better. The issue is the flux exposure to the air and ambient conditions. The flux can evaporate or absorb moisture from the air. If the paste
Electronics Forum | Wed Aug 09 14:55:42 EDT 2017 | cbeneat
Trying to show documentation/expert opinion to an operator or 2 why it's important to not let a first piece, that they so diligently built for the next shift to let sit for an hour, why that's not a good idea...other than me telling them so. And tel
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