Electronics Forum: much (Page 366 of 627)

Re: Adding leads to leadless parts

Electronics Forum | Sun Dec 19 08:05:14 EST 1999 | Dave F

Clarissa: We've all done thing on a limited basis, especially on prototype boards, but this doesn't sound like a limited basis, or prototype boards. (And may be I reading too much into this, we all know the frailities of conversing like this.) Thi

Re: Wave soldering smt components

Electronics Forum | Wed Dec 15 04:59:40 EST 1999 | Joshua Hall

Hello KA, When producing in kind of PCB product you have to base much of your decision on cost effectiveness, time, and quality. In order to get the best of all three you have to decide which you want to be your top priority. By adding an epoxy to

Re: Poor solder joints on QFP 100's

Electronics Forum | Mon Dec 13 05:43:27 EST 1999 | Wolfgang Busko

Hi Steve, 20 mil pitch shouldn�t be that problem nowadays. In your case bridging and poor wetting seem to go hand in hand. For the poor wetting try to eliminate it by using different paste (higher activated) and work on your profile. Coplanarity also

Re: too bent or not too bent...

Electronics Forum | Fri Dec 10 17:08:51 EST 1999 | John Thorup

Tell those leads not to be drinking so much. Anyway... too bent to work in a sequencer or auto insertion machine is a lot less bent than if you're trying to manually stick it into a hole. As far as where the lead exit/enters the body of the compone

Re: Soldering long lead thru hole parts

Electronics Forum | Thu Dec 09 17:29:15 EST 1999 | Russ

Mike, It sounds like you have a serious problem, I don't know much about drag soldering or what your specific soldering problem is with your present supplier. I do know that with a conventional solder machine these leads won't even make it through

Re: More info

Electronics Forum | Fri Dec 10 14:49:57 EST 1999 | John Thorup

Hi Mike consider buying your LEDs from a value added distributor or sending the to a service house for trimming. It's no trick to cut so that one lead is longer than the other although you may have to pay a tooling charge. These people are equipped

Re: Color Code Mnemonic

Electronics Forum | Tue Dec 07 20:24:53 EST 1999 | Dave C.

Instead of a Mnemonic, I used association to remember. The crazier the association, the easier it is to remember. And each person can come up with their own associations. Here's some of mine: Black - The room is black when there's no (0) lights o

Re: Parts Wastage Allowance

Electronics Forum | Mon Dec 06 12:26:04 EST 1999 | Wolfgang Busko

Hi Greg, why don�t you see it this way: How many parts get lost ( consider the type and packing (reel, stick, tray ))loading the machine or replacing it. - This is the amount you should add for each job. How many parts are rejected or discarded by th

Re: In House or Out

Electronics Forum | Thu Dec 02 11:42:03 EST 1999 | John S.

Dick, My company made the transition from thru-hole to SMT about a year ago. We've been building thru-hole boards successfully for years, but our customer requirements have forced us into the transition. Wolfgang made a very good comment. Start s

Re: Info. on Stencil cleaners

Electronics Forum | Mon Nov 29 16:36:31 EST 1999 | Curtis T.

Jason, We have been running both the high pressure and the ultrasonic washers for several years and there is no comparison. The ulrtasonic (smartsonic) does a great job on all the normal pastes, and when we changed part of our production to a new ep


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