Electronics Forum | Wed Jan 11 16:56:15 EST 2006 | russ
So are you saying that you cannot reach 110C at 1 location without raising another location to excessive preheat temp? If so, sometimes slowing down the conveyor and dropping the preheat temps will help you get equal temps. I do not know this machi
Electronics Forum | Wed Jan 25 17:12:41 EST 2006 | adrian_nishimoto
Billy, I think the most versatile kit out there is the RB-2000 system from Mini Micro Stencil. We have not run into a part yet that we could not reball, even ones with a raised encapsulated center. They even make custom screens that match the compo
Electronics Forum | Tue Apr 25 12:29:35 EDT 2006 | Rob
Hi TMC, It's very unlikely that you'll get a temperature variation of 32 degrees by varying the top and bottom heaters - especially if it's forced air convection, as if it's a half decent system the hot air will be circulating in the zone, pretty qu
Electronics Forum | Fri Sep 22 14:07:29 EDT 2006 | realchunks
I think Sr is right. Miss prints are prolly a result of your tooling moving the board after the camera looks at the fids. It also could be the camera itself hitting the board from warpped board or tooling raising the board up. It may be the camera
Electronics Forum | Fri Jan 12 08:41:12 EST 2007 | geb
Hi, Our GSM1 pick and place machine has an Axis head 2 Z velocity error. None of the spindles of Head 2 work during placement and it brings up the error message. It will not proceed after that. I have tried lowering and raising the spindles in the
Electronics Forum | Fri Jan 19 13:42:11 EST 2007 | russ
Even the level of solder in the pot can have effect on your wave height. backflow gate may have been tweaked a bit, that affects wave height, many many things affect the proper RPM required for the correct wave height. Pot may be a little lower tha
Electronics Forum | Mon Jan 29 16:54:44 EST 2007 | slthomas
Some NC gunk is somewhat prone to raising a ruckus with rf circuits. Here's a smattering of info. re: that. It's been discussed and is present in the archives in a number of threads. http://www.smtnet.com//forums/index.cfm?fuseaction=view_thread&CFA
Electronics Forum | Wed Feb 07 09:37:48 EST 2007 | billyd
Had the very same thing happen the first time we used the small QFNs. The aperture for the thermal pad in the center needs to be cut in a grid form, either squares (with around a 10 mil spacing between openings) or circles, like a BGA pattern. Too mu
Electronics Forum | Wed Feb 07 07:36:11 EST 2007 | jax
mk, Should I read into the fact that you posted this on a sipad website? You could always add an etch process to you stencil design to gasket around the raised mask locations. It is currently done when additive etch's/trace's are used. The extra $20
Electronics Forum | Wed Apr 18 08:44:15 EDT 2007 | pjc
Every failure analysis study I've seen, (and quite a few by now) showes Pb Free failing in about half the time or cycles as Sn/Pb. HALT and HASS testing shows reality- run way from a Pb Free product other than a camcorder, etc...
