Electronics Forum: achieve (Page 1 of 66)

how to achieve 500ppm?

Electronics Forum | Tue Jun 14 16:37:56 EDT 2005 | slthomas

You may be right. I may have read something into his post that wasn't there....

how to achieve 500ppm?

Electronics Forum | Mon Jun 13 16:15:04 EDT 2005 | peter ng

Dear all, We faced some major issue in setting our company target to 500 points per million at machine throw rate.It might be caused by human error,machine,feeder,environment or other factor.We need some opition and advise on how to achieve this targ

how to achieve 500ppm?

Electronics Forum | Mon Jun 13 16:17:30 EDT 2005 | peter ng

Dear all, We faced some major issue in setting our company target to 500 points per million at machine throw rate.It might be caused by human error,machine,feeder,environment or other factor.We need some opition and advise on how to achieve this targ

how to achieve 500ppm?

Electronics Forum | Tue Jun 14 11:25:19 EDT 2005 | pr

Sounds a little tough to achieve. Math isn't my strongsuit but...If you run a million parts through the machine, you will have 200 feeder exhaust's (assuming 5000 per reel). So if you have your machine error out after 3 attempts/misspicks you will ha

how to achieve 500ppm?

Electronics Forum | Tue Jun 14 16:21:15 EDT 2005 | pr

My chipshooter will not "Time out", it will try to pick 3x and then alert the operator. Which would be 3 misses per empty reel. Unless I misread his post, he said 500 ppm at the placement machine. That makes a big difference.

how to achieve 500ppm?

Electronics Forum | Tue Jun 14 10:38:53 EDT 2005 | Stefan

500 rejected (?) per million placed components is a very good rate, considered that it would be better than 4 Sigma if you name it defects on the board. Or do I incorrectly convert ppm to dpm? * 3 Sigma 66,800 defects per one million opportuniti

how to achieve 500ppm?

Electronics Forum | Tue Jun 14 15:03:15 EDT 2005 | slthomas

In that the machine times out and waits for a feeder refill and doesn't just skip that part and leave the space empty, it's not a defect. I have found 500ppm *fairly* easily attained in SMT depending on the board mix and how you define (1) a defect,

how to achieve 500ppm?

Electronics Forum | Wed Jun 15 00:50:32 EDT 2005 | Frank

From my understanding: Sigma is the same as one standard deviation. So 3 sigma is the same as 3 standard deviations. It all boils down to how repeatable your machine is. Another way to look at it is the probability (or confidence) that the machin

Can anybody suggest how can I achieve good solderability in convectional reflow oven If I reduced Convection Air Speed 80%. The

Electronics Forum | Thu Dec 14 14:43:54 EST 2017 | kahrpr

Just Curious why would you need to reduce the air speed by 80%

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