Electronics Forum: measuring (Page 46 of 265)

Calculating Reflow Slope

Electronics Forum | Tue Oct 05 20:07:12 EDT 2004 | davef

We do not know how your KIC2000 calculates slope. Here's an approach to calculating slope: * Subtract the lower temperature from the upper temperature. [Temp|upper-Temp|lower] = Temp|change * Subtract the time when the lower temperature was measured

Convertion

Electronics Forum | Tue Jul 26 00:58:11 EDT 2005 | grantp

Hi, It really depends on what your measuring. If it's water, then that has a specific gravity of 1, so with the metric system 1 Kilogram of water is equal to 1 liter of water. That's nice the way they did that. The conversion from 1 US Gallon to 1

Stencil past height issue

Electronics Forum | Tue Feb 21 21:17:41 EST 2006 | Cal Kolokoy

M, The paste height is what you establish it as. You're probably using a laser measurement system, and these depend on where your reference datum is. Some will measure from a silkscreen, a trace, or solder mask. These add height, not to mention H

Solder Paste Inspection Systems

Electronics Forum | Fri Dec 28 14:31:42 EST 2007 | clampron

RC, I agree. I have tried to educate management as to the real benifits of height measurement. Our President attended a CEO meeting of some sort and was told that solder paste height measurement will solve all of the worlds problems. She then inquir

help how to measure placement cpk

Electronics Forum | Fri Feb 29 14:58:35 EST 2008 | ck_the_flip

Here is a useful website that defines Cpk: http://www.itl.nist.gov/div898/handbook/pmc/section1/pmc16.htm For placement equipment, the manufacturers typically give you a glass plate, where the intent is to measure how far off the centroid you are

Clean vs No-Clean

Electronics Forum | Mon Sep 08 14:29:04 EDT 2008 | davef

�Another direct measurement to determine resistivity values (i.e. of remaining no-clean residues) can be performed through impedance spectroscopy. The surface resistance underneath chip resistors and capacitors can be determined to show the improveme

Attrition... how to measure it?

Electronics Forum | Mon Jan 30 13:19:37 EST 2012 | deanm

Now knowing that its a Quad, I'm assuming it has QuadAlign which spins the part it just picked in a beam of light and a sensor measures the length, width and height of each part. If it falls outside of a defined range, it will throw it in the dump bi

Attrition... how to measure it?

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

How to define solder paste printing height tolerance

Electronics Forum | Mon May 07 16:07:05 EDT 2012 | davef

Start with targets based on the stencil thickness (for height) and stencil thickness times the aperture size (for volume). * Set reasonable upper and lower control limits (+ 25% and –25 % of the targets, for example). * Next, check the printer set-u

Quad 4C laser align calibration

Electronics Forum | Wed May 25 22:32:28 EDT 2016 | stevedc

So, I haven't used my Quad 4C for a while and when I started everything back up to run a new board it appears that the Quad align is in need of calibration. When I pick up a component and do an LAE measurement on it it shows the part center location


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