Electronics Forum: after (Page 91 of 656)

Viscosity conversion units Query

Electronics Forum | Tue Dec 07 05:16:12 EST 2004 | kanwal324

We are using solder paste of Alpha Metals 390DH4. As per manufacturer guidelines the viscosity of paste after 1/2 hr. conditioning and after mixing in paste mixer,it shoule be between 800-1250KCP. Our customer is asking for viscosity to be maintained

Solder joint strength

Electronics Forum | Mon Mar 28 14:57:46 EST 2005 | chon

So far I've been working with a xtal. I've been placing this on a board and the part was falling from the board. We found residues on leads and notified vendor as contamination, after that 100% of our production has been verified with a perpendicular

Electrovert Vectra Variable Speed Drives.

Electronics Forum | Mon Jun 27 15:02:55 EDT 2005 | cmiller

Thanks for the reply. I had the instructions out of the manual but after re-programming we had all kinds of wierd stuff going on. After re-setting the PC several times it worked fine. Can I get a copy of the instructions you have? It would be appreci

vaccum & blow level for Juki machine

Electronics Forum | Tue Jun 14 17:10:43 EDT 2005 | peter ng

Dear all, I need some information about the Juki 750,760,2010&2020 1)actual vaccum level (with&without nozzle)-after measure 2)blow level(without nozzle)-after measure 3)Is the unit for Juki blow & vaccum level in KPA or mmHg? Thanks!

Fuji cp6 re-reading fiducials

Electronics Forum | Wed Jun 29 19:33:12 EDT 2005 | matjen

After the machine stops for any reason when restarted the z table goes to loader position comes up then goes back down and re-reads the fiducials, only one machine does this but we are losing valuable cycle time after every part change. We have Fuji

Possible to water wash no-clean solder paste boards?

Electronics Forum | Thu Jul 14 01:31:03 EDT 2005 | Ivan R

Hi Pyramus you should`t have a major problem after you wash the board as my crew also run into this problem a few month ago ,, I wash them after but I suggestto run one first it depent who is the paste from I think.

Possible to water wash no-clean solder paste boards?

Electronics Forum | Thu Jul 14 01:31:05 EDT 2005 | Ivan R

Hi Pyramus you should`t have a major problem after you wash the board as my crew also run into this problem a few month ago ,, I wash them after but I suggestto run one first it depent who is the paste from I think.

Cracked Joints & Ultrasonic Welding

Electronics Forum | Tue Nov 01 09:57:18 EST 2005 | Chris

Hi, I am experiencing cracked solder joints on ceramic resonators after the ultrasonic plastic weld process. PCB assy is placed into plastic housing and then housing halves are ultrasonic welded. Not a soldering problem. I know this component is

does copper wire become thinner when it dip to leadfree solder?

Electronics Forum | Wed Nov 02 01:24:07 EST 2005 | arnold

we are encountering a problem on our production. after dipping a copper wire AWG#30 to a leadfree solder the wire becom thinner and easily to break. does the leadfree soler has the capability to weaken the wire (lessen the diameter)after dipping to l

BGA inspection microscope

Electronics Forum | Wed Dec 14 06:18:20 EST 2005 | tk380514

right again grant, consider the fact that if you spend enough time inspecting the soldered boards/pre-oven and check the BGA solder paste pads before, and clean the stencil regularly and check solder paste dryness, check oven profiles then after chec


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