Electronics Forum | Tue Mar 16 09:31:21 EST 1999 | Dave Manero
I am looking for the dimensions of the qfp trays. I need to no the center to center as well as the edge to center. I will use this information to program the fuji QP machine for placing 44pin QFP from the tray, or other devices. I can measure this by
Electronics Forum | Mon Jul 11 10:48:48 EDT 2016 | mnorthey
I have experienced this problem on a number of different machines and have found that it has been one bad nozzle causing the problem. We run Juki 3010 and 3020 and occasionally we have had similar problems. One question, is it bad placements on all 6
Electronics Forum | Mon Jun 13 15:13:36 EDT 2005 | peter ng
The placing stroke(mounting press) of the BGA may be too high.Try to reduce the value at the component data.
Electronics Forum | Wed Aug 29 20:48:09 EDT 2001 | Jones
I know this is not the answer to your question but it may help until you get the right cleaning process in place. I have found that kneading the paste with 3-4 double strokes during the first print has aided in bring our defective ppm down somewhat.
Electronics Forum | Tue Mar 16 09:53:27 EST 1999 | Ben Kirk
| I am looking for the dimensions of the qfp trays. I need to no the center to center as well as the edge to center. I will use this information to program the fuji QP machine for placing 44pin QFP from the tray, or other devices. I can measure this
Electronics Forum | Tue Jul 12 08:54:34 EDT 2016 | leeg
well there you go. I found that trying > different values in the "Placing Stroke" had a > big effect. I changed it to 2mm and it placed > them well, but I could see the board also flexing > a little, went to 1mm and the problem came back, > so
Electronics Forum | Wed Nov 24 16:08:09 EST 2004 | Terrapin Station
This depends on the model. Most machines and turret style typically overstroke .2mm with a force of 250 - 300 grams of force. the reason for the over stroke is to place the component into the paste. This can be adjusted through part library manipul
Electronics Forum | Wed Jun 03 15:45:36 EDT 2015 | ldempsey
Well, it took me a while but I had a look at some gerbers. On a PCB with neighboring 0402's 0.006" apart, and paste reduced 0.75mil on each side, I get lots of bridging. On a later rev of the same PCB, we have neighboring 0402's 0.018" apart,and pa
Electronics Forum | Mon Jul 11 13:21:40 EDT 2016 | bradholland
well there you go. I found that trying different values in the "Placing Stroke" had a big effect. I changed it to 2mm and it placed them well, but I could see the board also flexing a little, went to 1mm and the problem came back, so have sat in th
Electronics Forum | Fri Jun 15 10:26:12 EDT 2018 | ks0707
Hello everybody, I’d like to hear your advice regarding the programming for multiple Pick & Place machines. My company is a Contract manufacturer located in SF Bay area and has 4 SMT lines with 11 Pick & Place machines. The good thing is that all o
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