Electronics Forum | Thu Aug 21 19:18:47 EDT 2008 | duchoang
My steps are different in that case: 1- Check mounts. Try to adjust origin point until get the pretty good mount positions. 2- Teach fiducials ( Board fids, not panel fids) 3- Use fids, check mount again. 4- If OK, then teach Block Repeat. This alwas
Electronics Forum | Thu Jul 23 15:05:16 EDT 2009 | stephan
I look for an international standard for PCB stretch . In case of misplaced solder paste versus stencil we noticed shorts after placement . I found cases where the PCB (image pattern) did not match with the stencil . It was due to PCB or stencil str
Electronics Forum | Fri Jul 09 10:32:47 EDT 2010 | rafacadiz
Hi Sean, I have seen this issue with lead free component on Sn-Pb solder process, I don´t know if it´s your case. Some times, pins not reach the necessary T for solder due to lead free metalization and in other case due to a groud pad, with a big T d
Electronics Forum | Tue Dec 28 03:54:50 EST 2010 | riscy00
Hi Has anyone has thermal capacitance model for QFN (9x9) package with exposed pad 7 x 7 (or 6 x 6). Ideally between junction and case, junction case and board (JESD51-7 or similar). I wish to do transient with spice, to established how long it tak
Electronics Forum | Thu Nov 15 23:45:53 EST 2012 | jaimebc
robgd3, The Z motor can be purchased separately, however, the theta motor can't. You need to buy the whole midas head. I didn't get as far as dissembling the theta motor casing to get to the theta motor. That was my worse case scenario. We ran thou
Electronics Forum | Thu Sep 12 11:22:58 EDT 2013 | gregp
Wow, great information! I have a feeling you are talking about some predominantly through hole assemblies with mostly common components. In this case fully automated solutions make sense if the volume is there. But these machines cannot do everyth
Electronics Forum | Thu Dec 12 12:54:25 EST 2013 | jaimebc
For selective soldered components, or even hand soldered, with vertical bend components, the body of the component, in this case a resistor, is making contact with the surface of the PCB, making it impossibe to visually see the solder fillet. Or to d
Electronics Forum | Wed Apr 19 09:40:12 EDT 2017 | dontfeedphils
Thanks for the suggestion Rob, this might work for us in some cases. In most cases though, I'll need multiple coupons per PCB purchase (a coupon per coating "setup"). Currently talking to some PCB suppliers to see if anyone can offer an affordabl
Electronics Forum | Mon Dec 09 16:05:22 EST 2019 | slthomas
All termination platings are not created equal (sic). Some parts put up more of a fight against wetting than others, and in those cases you really have to dial it in. It seems like that in most of those cases I end up reducing the temps in the midd
Electronics Forum | Fri May 14 14:58:02 EDT 2021 | daisymu
I already understood thank you very much. In fact, between the oven and the AOI we have a conveyor that measures around 6.5 ft. Only in this case we set the time of the line so that the process was efficient, now that the AOI increased its loading an