Electronics Forum | Thu Dec 04 12:24:35 EST 2008 | jdumont
We have the same Asymtek machine, same Humiseal product, same bubbling issue on touch ups. Ive found that very light pressure and a thinner mixture usually yields good results for us. Generally I dip the brush in the mixture and let it drip near wher
Electronics Forum | Mon Apr 25 17:46:04 EDT 2011 | ldavis
I think Patrick is on the right track. Try running the fixture 180deg out from typical, if possible, and see if the problem goes away or moves to another fuse clip. I've also noticed some wave fixtures can create air pockets that won't allow proper
Electronics Forum | Thu Oct 31 11:08:12 EST 2002 | soupatech
Being very new to SMT I won't assume I know what the problem is but.... I had lots of air pockets in solder joints, 95% of the boards. Everyone I spoke to thought it was a problem with my process but when one board was sent to our supplier they admi
Electronics Forum | Mon Oct 21 10:05:53 EDT 2002 | John S
We just started using DEK's pump print process on a high volume SMT line. We are using Hereaus 955. It works well for most components, but we have an issue with missing/partial glue dots on large diameter deposits (0.050"). The stencil will be com
Electronics Forum | Fri May 02 09:37:23 EDT 2003 | Jerry Magera
Via in pad is the most efficient use of space. Blind via seems to be blamed for this. Cross-sections (send me some) will probably show a void still existing in the via or spherical voids aligned near the component pad side. One can estimate the vo
Electronics Forum | Mon Mar 20 09:08:42 EST 2006 | mapell
AR Sounds like dirty chains... couple ways to check... Pull off the drive chain for the conveyor. Place a wrench on the (unload end) drive shaft and spin, if it is a bit tough.. dirty rails. Also look at load end of chains. The chain goes low and w
Electronics Forum | Wed Dec 07 17:43:31 EST 2011 | mikenil
Hi I do not work for a board house but a manufacturing facility where we do a considerable amount of soldering wires to through holes. We pretin our through holes on both sides of the PCB prior to reflowing the solder and installing the conductor (w
Electronics Forum | Thu Aug 04 11:31:45 EDT 2005 | lloyd
I'm not overly familiar with the Pana machines but I recently had the same issue with a SOT23. We have an option on our machines to switch on an early vacuum on pickup and it was this that was causing the problem. I'm not overly sure how it caused th
Electronics Forum | Wed Feb 08 22:15:39 EST 2023 | stephendo
Careful with the term "vacuum sealing". You do NOT want vacuum in the MBBs. If you take out too much air you can create pockets where the moisture gets trapped. Also you can cause corners to pierce the bag. And you can even cause moisture to be pul
Electronics Forum | Tue Sep 07 12:02:30 EDT 1999 | Brad Kendall
| Dear sirs, | | If you have experienced Proflow of DEK screen printer, please let me know the details of it. | | Best regards, | | Jame Bond | | I have had Proflow for about 8 weeks now. I have had my fair share of problems with it. It does
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