Electronics Forum | Sun Jun 29 07:31:03 EDT 2014 | vitrost
Hi, We had experienced very similar issue on boards of a certain PCB manufacturer. Field experiments showed that the solder mask of this manufacturer is prone to swelling and peeling after it was in contact with our water-based flux. When you switc
Electronics Forum | Thu Jun 05 03:45:58 EDT 2014 | angelyeoman
In modern times. there are various kinds of secure devices to provide safe environment for people. For example the security camera can be used to monitor suspicious person come and go in the office or people's own home. Besides the vehicle inspection
Electronics Forum | Mon Jun 09 09:52:10 EDT 2014 | swag
Yes, jsd.jwww it can be seen right after reflow. I read back thru the spec sheet and under "soldering conditions" is says "temp. at cap surface" so thanks, SteveO I think you hit the nail on the head and we'll have to revisit the profile and target
Electronics Forum | Thu Jun 05 16:58:16 EDT 2014 | proy
I would love to use my old zevatech with a large nozzle (qfp) to pick kapton masking dots and place them on a board. I am getting some 'thicker' kapton dots to test, and need to find a way to present them, might be a trick but worth a try. Has anyon
Electronics Forum | Fri Jun 06 06:11:18 EDT 2014 | paulg
I have a large monoblock ceramic filter on a PTFE based pcb material. The filter has a metal casing soldered onto the ceramic filter. I am concerned that if the heating rate is to rapid, then thermal shock / differential expansion could cause the fil
Electronics Forum | Tue Jun 10 15:47:18 EDT 2014 | hegemon
Possibly the components have been re-taped in that particular reel, with only electrical function in mind? Hard to see a nozzle causing a flip, and I am thinking if your feeders are vibrating bad enough to flip the components in the tape, that you
Electronics Forum | Tue Jun 10 22:57:18 EDT 2014 | demzvill
Our observation also is that the tape size is too big for the chip which allows the tape to move around. With this i would like to know if there is is a setting in the machine that would slow the feeding rate. We are using juki mounter 2000 series. A
Electronics Forum | Wed Jun 11 08:53:53 EDT 2014 | fredcalkins
That would be easy to check. Degaus the whole nozzle not just the tip. It should take more than a week to become magnetized again. If it becomes magnetic sooner maybe degauss the head? I would also make sure your vacuum does not come on till the noz
Electronics Forum | Wed Jun 11 10:01:24 EDT 2014 | isd_jwendell
I do not know the Juki machines, but on my Essemtec I need to turn on the vac after the nozzle is down for 0402 parts. I also cannot touch/hit the current part/tape because it tends to flip the next part from the tape bounce. Then there is also the t
Electronics Forum | Tue Jun 10 11:44:25 EDT 2014 | patel_daxa29
It is very hard to say by looking at picture(solder joint quality).Overall appearance looks good.If you think is not sufficient solder or meeting required standard, enlarge opening of connector on solder stencil. Make all conn. aperture square or in
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