Full Site - : heat sensitivity (Page 22 of 32)

Tape not pulling back on components causes machine to stop

Electronics Forum | Wed Mar 20 12:59:10 EDT 2013 | kmots15

We had this issue with a few parts on our universal 8mm feeders. The set up was correct all mechanisms were working, even tried a new feeder. The spring in between the take up wheel and pick point just wasnt cutting it since the adheasion was too m

Expanding my skills

Electronics Forum | Tue Oct 26 15:44:35 EDT 2004 | Paul_pmd

Hi Mike, Surface mount components arn't difficult to work with at all. They have pretty much the same tolorance to heat degridation as Dip packages. I suggest two Irons when working with two pole resistors and caps. Heating only one end at a time wil

Baking time for PCBA rework

Electronics Forum | Wed Apr 24 21:35:34 EDT 2002 | davef

Ooooo, much better. Tough to say, because of all the variables [ie, different materials, moisture level, temperature, etc]. Plastic encapsulated devices, especially IC, absorb water from the air, which is violently released during soldering. Typica

Solder Pallet Maintenance?

Electronics Forum | Wed Jul 11 13:55:26 EDT 2007 | bschreiber

We have received several e-mails and phone calls regarding the Permali recommendation of cleaning Durostone pallets so I thought I would address these questions on the forum for everyone's benefit. Q: Can 440-R SMT Detergent be used for manual clean

Moisture sensitive device re-packaging

Electronics Forum | Wed Aug 11 10:28:20 EDT 2004 | Richard Evans

We currently are supplied parts that are moisture sensitive that have high MOQ's even though product volumes are low. These devices are heat sealed by the manufacturer but we have no method to re-seal the packaging to protect the remaning items from

Metal foil is pulling away from the screen.

Electronics Forum | Mon Feb 19 13:04:17 EST 2001 | billschreiber

The ultrasonic frequency used in today�s stencil cleaners is usually a 40 kHz �sweep� frequency (also used on semiconductors and other sensitive cleaning applications). This frequency is not low enough to cause stencil damage (the lower the frequen

Moisture sensitive ICs in repairs/refurb

Electronics Forum | Fri Jun 28 06:12:27 EDT 2013 | grahamcooper22

If the soldering process isn't heating the whole package up to soldering temp then NO you don't need to keep them DRY (using a soldering iron to fit a QFP for example)....but if the soldering process is done on a rework station or in a manner where t

PSA vs HAA Throughput

Electronics Forum | Tue Sep 12 17:35:20 EDT 2000 | Gilbert Ramirez

Supplier currently using pressure sensitive cover tape. They tell me that getting a new system with heat sealed tape capabilities will cut their throughput in half. Could this be true?

Temperature sensitive part

Electronics Forum | Thu Dec 13 16:18:29 EST 2001 | smtspecialist

I have a 10k thermistor to solder to a board, the problem is that the thermistor can't absorbe more then 105 degree C and as soon as I send it through the reflow oven or hand solder it, the part internaly over heat giving inconsistent readings. Any

How many times wave solder?

Electronics Forum | Fri Apr 20 07:40:28 EDT 2007 | realchunks

Hi PeteB Do you know PeteC? Anyway, it all depends on your most sensitive part. Look up the spec sheets to determine. Most general parts can take 3 or 4 heat cycles easily.


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