Electronics Forum | Thu Sep 11 16:50:18 EDT 2003 | davef
Sure it's conceivable that thin HASL can cause tombstoning. Harkening back to the ample discussion in the fine SMTnet Archives, tombstoning is caused by an imbalance in solder surface tension between the two pads of SMT component. The source of thi
Electronics Forum | Thu Jul 06 13:36:37 EDT 2006 | SWAG
We've had much trouble with flex circuits. As previously mentioned, you must have local fids for the board or the BGA itself (if panelized). Other troubles we experience are drilled holes for pinned connectors. Unless the PCB manufactur has some w
Electronics Forum | Wed Jul 27 12:50:59 EDT 2005 | mnguyen
You may want to look at which spindle that is dropping the nozzle and check the O-ring on the spindle head. It's probably bad, cracked, or broken. Replace it and that will fix it
Electronics Forum | Fri Aug 22 15:26:18 EDT 2008 | rway
I rarely use blk fiducials. But when I do, they are always programmed after the fids. It's the fids that sets your general alignment of the panel. I only use blk fidus for thin pcbs (30 mil) that tend to warp when on the conveyor.
Electronics Forum | Fri Jul 12 12:04:51 EDT 2002 | jax
The Lizard Tongue is just a thin metal strip that, when actuated, slides over the BGA component and holds it down during transport. If you contact FUJI, they should be able to give you a part number, and install instructions..... maybe even the real
Electronics Forum | Tue Jun 20 15:08:30 EDT 2017 | ranap121212
Hello I have the problem with selective soldering on the robot. Thin balls appear on the laminate. The tin sometimes shoots...? and then the balls are a few millimeters from the soldering point. I tried up or down with temperature, but it did not wor
Electronics Forum | Sat Feb 12 13:19:27 EST 2011 | tpappano
A simple trick I read either here or on another P&P forum is to use "Silly Putty". Place a small thin spot of Silly Putty on the top of the front conveyor rail, and put the machine in "manual" mode. Steer head #1 over the putty and lower it, leavin
Electronics Forum | Tue Aug 09 13:25:24 EDT 2005 | pr
From what I can gather, the annular rings are used for grounding when these boards are put in housings. A screw goes through the hole and is torqued down. If there is excess solder on the annular ring, the screw doesn't seat properly. The pallets cov
Electronics Forum | Wed May 21 14:47:49 EDT 2003 | radney
On the new 4797 T12W8P feeders we are having trouble picking the very thin chip resistors. Adding foam to the feeder (beneath the pick point) helps, but it only minimizes our frustration. Universal has a reel of these parts and they are looking into
Electronics Forum | Wed Sep 14 04:39:43 EDT 2011 | dilogic
It has very simple construction - there are two rubber o-rings which serve as a coupling. On ours, one was broken and after replacing it with a new one everything was as new. Just open the head and it will all be clear - it's very easy to fix. - Den
