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
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 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
Electronics Forum | Tue Aug 12 19:18:34 EDT 2008 | arminski
Hi davef, couple of questions: clarifying costing of direct labor against overhead cost: an operator loading PCB onto the reflow oven is a direct cost, how about the reflow process time of the PCB while travelling inside the reflow, is that an ove
Electronics Forum | Fri Apr 20 08:41:56 EDT 2001 | jimlew
For those of you out there, like myself who are still using 2-d to measure paste ht, I have 2 questions. 1. Typically, what tolerance are you applying to your ht? +- 1 mil, or what? 2. Are you using metal squeegees, and if so, have you found that squ
Electronics Forum | Mon May 07 10:42:09 EDT 2012 | saju86ece
Hi, I need one clarification about solder paste printing height tolerance. How to define and fix the solder paste height tolerance after screen printing for inspection purpose. Currently we are using 5mils thickness of stencil, in that we are gave
Electronics Forum | Thu Mar 17 09:56:34 EST 2005 | jmedernach
Tx, Your spec limit is the point at which you expect to see a failure. In other words, what is the probability that you'll see a short when you have .008" of solder paste? What is the probability that you'll see an open if you have .004" of solder
Electronics Forum | Thu Oct 02 17:00:44 EDT 2008 | davef
Is that accurate? If so, what are your aspect & area ratios? [Similar to the JerryS comment above.] * You say, � � and the average height is very high: nearly 200 pct.� => Our troop can make paste that height too. They snap the stencil-off a fast as
Electronics Forum | Wed Apr 11 20:58:12 EDT 2018 | jacobidiego
YES to the first question in some points of the board. Bulky, to the second question when it is not in short. What you say about the PAD height, helped me to understand why the SPI shows weird values for other measurements. I am currently doing test
Electronics Forum | Thu Apr 12 04:17:08 EDT 2018 | buckcho
Diego, I dont know how this machine works. Maybe they patented some way of measuring. But the idea of Mr. Evtimov is very good. Measure the pad only and see its value. If it is not 0, you have to know why, maybe ask the machine supplier. Also like Mr
