Electronics Forum | Fri Aug 03 10:18:36 EDT 2012 | pctech
Greetings everyone, I am trying to figure out away to clean our stencils by hand. Unfortunately, we do not have a stencil cleaner due to size and finance of our company. I am using Ionox to clean them daily.But the walls do not come clean. Is this a
Electronics Forum | Mon Aug 06 09:55:32 EDT 2012 | dyoungquist
Techspray makes a liquid called "Eco-Stencil SMT Stencil Cleaner" and also pre-saturated wipes by the same name. We spray the cleaner on the stencil and then use the wipes to clean the paste off of the stencil. Putting 1 wipe in each hand and rub
Electronics Forum | Thu Mar 04 16:40:06 EST 1999 | Dave F
| Hi, | | For hand placement you should see about 150-200 ppm of errors (solder, placement, values etc) on a board populated of types such as 1206, 0805, SOT, Tantalum etc. . As for solely wrong components (component at wrong location) you can usual
Electronics Forum | Thu Mar 04 12:44:01 EST 1999 | SMTASSY
Hi, For hand placement you should see about 150-200 ppm of errors (solder, placement, values etc) on a board populated of types such as 1206, 0805, SOT, Tantalum etc. . As for solely wrong components (component at wrong location) you can usualy redu
Electronics Forum | Fri Apr 10 13:25:08 EDT 2009 | jefflkupkt
Layer 2 is the ground plane layer of a 4 layer board. After installing a 2.5 mm DC power jack and 0.1 center SIP header by hand, the ground pin disconnects and causes an open. My board supplier said they passed Electrical Test. Prepreg was within
Electronics Forum | Fri Apr 10 18:51:39 EDT 2009 | boardhouse
Hi Jeff, Your board supplier could be correct in this way. The board could have had just a hair left of copper on the circuit, which would hold up under the electrical test process, but once you powered it up, then there was enough juice to burn th
Electronics Forum | Mon Apr 13 12:06:53 EDT 2009 | jefflkupkt
BoardHouse, Thanks for the reply. The board supplier did cover the cost of the bare boards. Five years ago I saw a different part pass ET only to fail at final assembly test as well. One engineer called it "acid trap" on the inner layers where the
Electronics Forum | Wed Mar 06 06:47:00 EST 2002 | francoiscal
Hello, Does any one as a database regarding component assemble by hand on a PCB. More accuratelly how much time (per sec) does it take to bend leads on a component(res), time to insert the component by hand, time to solder by hand. Any time base dat
Electronics Forum | Thu Mar 07 02:33:44 EST 2002 | cmay
I agree with Dave. The only reliable way is to perform a time study using a watch with decimal minutes. Setup the study using an average rated operator and time 10 component insertions (from pick up to hands off), time 10 component soldering operati
Electronics Forum | Wed Mar 06 12:14:34 EST 2002 | caldon
We would benchmark our times with the most experienced operator and them boost the time by 1/3. Example: If it takes Mary 3sec to insert the component, 3 secs to clinch and cut the leads (it is not advised to cut the leads after soldering), and 8 sec
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