Electronics Forum | Mon Jun 23 16:04:20 EDT 2003 | DG
There are some variations on how many parts are on a reel. A couple of distributors we use state it as a +/- 1% on a reel of 10,000. This only applies to chip parts (R's & C's) Most I.C.'s on Tape and reel are counted very accurately due to the pric
Electronics Forum | Wed Jul 09 19:05:06 EDT 2003 | randywomack
LOZ. Under-cured or out-of-spec(sloppily) applied resist is realistic. What other physics: Shiny resist surface is more prone to balls then matte finish. How about an operator eating fish & chips before handling the boards. Don't laugh... ... saw th
Electronics Forum | Thu Jul 03 15:03:39 EDT 2003 | Jim Nunns
My design group wants to change our route keep out around all SMT parts to 5 mil even under the parts with zero standoff. Are others in the industry routing under parts that have no standoff? My fear is that we will get shorting if the mask is scaped
Electronics Forum | Thu Jul 03 15:29:46 EDT 2003 | bpan
Hello Jim, We build boards that have traces under the parts all the time. For the most part, we have no problems but on one product we have an 0805 that bridges 2 traces with a very tight seperation and if any solder smears (under the part)we can and
Electronics Forum | Wed Jul 16 06:38:17 EDT 2003 | Wave
We have acquired an UltraPak 600C wave machine and are investigating the possibility of installing a centre support wire conveyor to eliminate the use of pallets. What is involved in this project and how feasible is it? The boards have bottom side SM
Electronics Forum | Mon Aug 11 11:51:53 EDT 2003 | ServGuy
Personally, I'd run 1 time recovery, and depending on chip-shooter model, I'd use 2nd station parts detection on larger parts with error stop. The situation you decribe, a couple caps an hour would'nt stop the machine unless they came from the same f
Electronics Forum | Mon Aug 11 11:52:05 EDT 2003 | ServGuy
Personally, I'd run 1 time recovery, and depending on chip-shooter model, I'd use 2nd station parts detection on larger parts with error stop. The situation you decribe, a couple caps an hour would'nt stop the machine unless they came from the same f
Electronics Forum | Thu Aug 14 17:29:15 EDT 2003 | Andrea
We use these but we hand solder. The resistor is basically a wire inside the encapsulant. When we noticed the bowing, we tested about 200 that were on different CCA's. They were all fine. If they want to use these under the wave solder, be sure to lo
Electronics Forum | Mon Aug 25 12:04:42 EDT 2003 | John Inglis
We are currently seeing short circuits on both 100nF and 1uF capacitors from TDK circa 2001. There are known design limitations to the PCB resulting in mechanical stress, howevre this PCB has been built for several years and this is a new phenomenon.
Electronics Forum | Wed Sep 03 15:49:18 EDT 2003 | terrapinstation
From the equipment side in the last 10-15 years ? I suppose the whole push toward modular machines. Less floor space, increased capability in a single platform - speed of a traditional chip shooter, common spares, blah blah blah. Some of the recogn
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