Electronics Forum: two passes (Page 7 of 22)

Re: PCB Support

Electronics Forum | Tue Nov 30 16:21:02 EST 1999 | Mike Moninger

A really nifty nest can be made by making an RTV mold of the first side of your assembly. Assuming all are identical within some small tolerance, the resulting mold holds the board very securely and distributes the loading. Cover the components with

Deleting UNREAD Emails

Electronics Forum | Tue Aug 13 13:31:54 EDT 2002 | neil

Dave, I think we may have been under pressure to do two things simultaneously when the web email system was built. Obviously letting the expiration date on the Geary's pass by was not an option but the web email still had to get done and I guess I ov

Reflow profile adjustment with different kind of PCB

Electronics Forum | Tue Aug 10 06:45:54 EDT 2004 | Snehal Acharya

Hi to all, I'm facing a soldering problem with one of my series of Product, since we were using a two different kind of PCB 1.GE(Glass Epoxy)2.PP(paper phenoline) in later PCB if i will use the same profile of the GE then it will get backed more & i

First Pass Yields

Electronics Forum | Fri Nov 10 09:09:48 EST 2006 | russ

That is great point John, it definitely gets you closer to apples vs apples. Remeber one time when we were compared to a another Mfgr that made a square box of plastic for one of our customers we made the PCB the fit into that box, we had wires, fi

Prototype SMT & Ltd Prod Line Choices & Advice

Electronics Forum | Mon Mar 17 15:45:59 EDT 2008 | slthomas

Something to consider is the ability to pick from 2mm tape if you're going be placing 0402s. Quads can't really do it (at least they couldn't do it about 6 months ago when we inquired), but you can program two feeder locations for the same feeder and

Solder Wire Expiry Dates

Electronics Forum | Wed Aug 26 10:48:30 EDT 2009 | grahamcooper22

Some print expiry date on reels and some specify a shelf life on data sheets. Two main reasons are that the flux in the wire is a mix of chemicals and over time in storage these can react so soldering performance can be changed. Although I have to sa

AOI for solder inspection

Electronics Forum | Sat Nov 07 10:09:52 EST 2009 | ramses2001

Hi Nemo, In my factory we have an offline AOI from VISCOM for two SMT lines. It's not so easy to program, but the results are very good. Anyway you should have to think that an AOI system needs a human inspector and a technician to debug the program


Electronics Forum | Mon Mar 05 23:10:25 EST 2012 | vinitverma

The algorithm only checks if all the 8 parts can be picked up by 8 heads without any mechanical interference during pickup or during rotation. In case if foresees any interference it divides them into two different charges instead of one. You can try


Electronics Forum | Fri Nov 04 15:16:09 EDT 2016 | mmjm_1099

Couple things here that could be the caused. Option 1: Error pass, Option 2: Vacuum release issues, Option 3: Magnetized nozzles (I have seen this occur by purchasing cheap nozzles), Option 4: Dirty Nozzles. Currently have two CP43 and one CP42 that

Re: Homeplates..??

Electronics Forum | Mon May 03 17:10:10 EDT 1999 | JohnW

John: Homeplate is a reference from that American version of cricket ... baseball. In baseball, the pitcher throws the ball towards the batter and the ball must pass over homeplate to be considered to be strike. The ball also must be between the

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