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 | Tue Jan 24 21:30:09 EST 2012 | jorge_quijano
It means the machine places another component, no missing PCBs are built. As an update I have measured this % in the newest machine and it is below 1%, but in our worst machine (old quad) it is as high as 9% for a small batch of 10 boards (~15 comp p
Electronics Forum | Fri May 15 08:04:32 EDT 2009 | rwyman
higher temp/shorter time). Solder mask may be a factor as well. I've seen parts get knocked off where the glue is still affixed to the part, along with a nice piece of solder mask from the board. If you can knock a part off with casual contact, th
Electronics Forum | Wed May 20 09:52:50 EDT 2009 | dwelch123
Use a push/pull tester. I use an OBA inst. works Ltd. tester. Just because mask comes off with bonder doesn't mean bonder is strong or cured right. Mask can be weak in between pads do to area size. Do it right and you'll know for sure. To many people
Electronics Forum | Wed Feb 15 10:37:19 EST 2012 | caerleon
The only way you will be able to measure it is to count the reel before you put it on the machine, count them when they come off and deduct the amount expected to be placed. you will then have the result of attrition on the machine. or.. Pick the p
Electronics Forum | Fri Feb 29 09:51:39 EST 2008 | iantech
Guys I am trying to measure the placement repeatabilty of my placement machines, and I was wondering if you guys had any usefull excell tools you have developed along the way that might help me input the figures so my bosses can understand ian.
Electronics Forum | Mon Mar 03 23:20:24 EST 2008 | daxman
I may suggest talking with the fellas at SMT Research. They have an awesome tool (POD) that can measure it for you if you're interested in having them do it. From my experience, they are always willing to talk with you over the phone too, so I'd ima
Electronics Forum | Thu May 07 02:16:45 EDT 2015 | buckcho
i need a menthod for calculating amount of > solder paste need in a single pcb or a lot of > pcb(1000 pcb). i need reduce wastage of solder > paste in the process , so any one can > help........ Hello, you can measure the weight, before the pas
Electronics Forum | Sat Feb 04 23:09:00 EST 2012 | jorge_quijano
Thanks for the info, I will check tolerances and the quadaling option. As an update I ran this past week and machine was arround 5% for a very small lot size, for a larger size lot it was less than 2%, Now I know it still higher than our newest machi
Electronics Forum | Mon May 11 12:15:46 EDT 2009 | jorge_quijano
Hi, I just want to know how to measure the strength of a 0603 after it's cured, we are using Heraeus PD944 with a 30-7 mils stencil, glue depositions looks well, but I don't know how to measure it? Thanks
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