Electronics Forum | Thu Aug 13 15:16:16 EDT 2009 | davef
BoardHouse: You mean that our 'Martin Gershenson' might be this guy? Martin Gershenson; Christopher Associates Inc.,3617 W. MacArthur Blvd.Santa Ana, CA 92704; 714–979-7500 martin.gershenson@christopherweb.com So, you're implying that unlike some
Electronics Forum | Wed Aug 26 18:58:07 EDT 2009 | rossi
I am not sure that it is the pillow problem. With the pillow problem you tend to see residual solder on the pad and voids where this solder pulled from on the ball. What we are seeing is a very thin flat layer of solder on the pad and a flat surface
Electronics Forum | Mon Aug 24 13:13:37 EDT 2009 | zombie
Hello, I need some suggestion. I want to acquire a rework station that can handle small CSPs and has a vision system, but cost is a concern. Does anyone have an opinion on the brand I should look at? I see that there are some air-vac drs22 pre-owned
Electronics Forum | Mon Aug 24 17:34:18 EDT 2009 | hegemon
DRS22 is not really comparable to the DRS25 due to a huge difference in the bottom heat technology used on those machines. If the PCBs are light enough the huge power of the DRS25 bottom heater is likely not needed, though. I would ask about your pr
Electronics Forum | Fri Nov 06 16:20:59 EST 2009 | 11562knott
I've speced in CircuitCAM at 3 different company's since 1996 and wouldn't use anything else. When we program our Mydata using CAD data within 5 minutes we have a program + a couple more minutes to verify the color visual aids by station. When we rec
Electronics Forum | Tue Sep 01 02:57:42 EDT 2009 | d0min0
davef As for the repair : - with hot air blower it is not possible (you can melt, but it will not wet) - with standard iron - no problem to repair (no additional material is needed) isd.jwendell yes, the profile is checked on those places (same si
Electronics Forum | Thu Sep 03 04:53:31 EDT 2009 | d0min0
to summarize - 3 components are placed on a single module x 8 on pcb - 2 anodes & 1 cathode are infected (so no component for us) - the problem does not look like wetting problem as the component and land pad is wetted, but the paste is not complete
Electronics Forum | Thu Sep 17 04:48:51 EDT 2009 | grahamcooper22
The colour you see on the pads is tin/copper intermetallic layer. In your reflow the immersion tin coating and the copper pad underneath react to form in intermetalic layer. The effect is worse the hotter the pcb or area of the pcb gets. In IR reflow
Electronics Forum | Tue Sep 22 10:29:18 EDT 2009 | stepheniii
To how many decimal places? Do you want to have a factor for different screen printer operators? There is no such formula and I doubt there ever will be one with any real accuracy. The stencil house might be able to tell you the total area of the
Electronics Forum | Tue Sep 29 11:54:28 EDT 2009 | mikesewell
Here's a stab at it... Decide on how much overlap you need for your spray pattern and calculate your effective spray width. 4" spray with 25% overlap would be 3". Keep your units the same (unit lengths and unit length per unit time). Assumes your
.png)