Electronics Forum | Sat Mar 31 08:22:42 EDT 2007 | davef
Are you observing stencil design rules with regard to aspect and area ratios? For more: * IPC-7525 - Stencil Design Guidelines * A previous discussion http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=24848 * Other postings on stencil ratio
Electronics Forum | Fri Mar 30 23:35:43 EDT 2007 | mika
Question: Does this formula apply even for the small LGA:s like LGA36 6.5 x 3.5 x 0.6 mm pad size 0.35mm pitch 0.60mm? We use a 0.13 mm stencil thichess beacuse on the same board there is some P.I.P comps. The board dimensions is 35 x 50 mm on a pane
Electronics Forum | Sat Apr 21 16:16:15 EDT 2007 | GS
150 grams)on a very thik board (> 3,5 mm)( we did it by DRS-24). On top to this, in case of need you can use also hot N2 (Nitrogen)and get low ppm of O2, for instance when soldering on OSP finisching using NC paste, etc, if required. Regards...GS
Electronics Forum | Mon Aug 20 10:03:48 EDT 2007 | slthomas
Wow. Never have, never would, but that doesn't mean it couldn't be done. Mostly it just seems impossible to design a carrier clip that could hold both well...more likely it would hold one well and the other poorly, or both poorly. Anyway, is there
Electronics Forum | Thu Jul 17 08:17:50 EDT 2008 | edmaya33
5 mil stencil.instead of round, use diamond aperture. RSS profile @ 215�C peak temp on balls(Sn/Pb), with a total of 3.5 minutes profile lenght.Ramp rate at 1.7�C/sec from ambient to 160�C. Consider also good cooling system on reflow. If rework proc
Electronics Forum | Thu May 13 13:34:15 EDT 2010 | janselmo01
We use Honeywell 3800GHD24E linear scanners for barcodes down to 3.5 mils with no problems (priced under $200). I looked a combo scanners (for 1D and 2D) that can do fine lines, but they are priced over $700. So we use a dedicated 2D scanner where
Electronics Forum | Tue Jan 17 21:58:42 EST 2012 | jorge_quijano
Hello guys I hope you can help me, I had worked with machines that usually tell you how many components are dropped off, now I have some very old machines without such information, any idea how to measure if attrition rates are normal? I expect to be
Electronics Forum | Mon Oct 27 20:01:00 EDT 2014 | rangarajd
Hello, We are facing solderability issues on a particular lot of board. THe Nickel thickness measured with an XRF is around 400 U inches. Spec calls out for 130 u inches Nickel and 3 - 5 U inches gold over it. Assuming there is no porosity on the g
Electronics Forum | Fri Mar 08 05:44:40 EST 2019 | bukas
are you sure #1 and #6 are interchangeable? if I remember correctly there is a catch with those motors, like there are 2 groups, group 1 being #1 #3 #5 and group 2 being #2 #4 and #6. maybe try getting it back and swapping cables at drivers for head
Electronics Forum | Thu Oct 22 22:16:32 EDT 2020 | kumarb
The flat ribbon cable for the floppy drive is keyed and respectively, the RED STRIPE denotes pin # 1 on the Floppy Drive Connector. Do check that that is correct. As a simple test, remove the floppy drive and power up without the drive connected. D
