Electronics Forum | Wed Jul 29 07:06:44 EDT 2009 | patrickbruneel
Deni, This looks more like webbing and not flux residue. Webbing is caused by not enough flux to protect the surface resulting in oxide webs sticking to the board surface. The insufficient flux can be caused by: - Weak flux foam head - Air knife p
Electronics Forum | Wed Jul 29 07:45:37 EDT 2009 | patrickbruneel
Deni, When using a no-clean flux preheating is a critical parameter. If you don’t have a thermo profiler you can use inexpensive temp. labels See link http://www.coleparmer.com/catalog/product_view.asp?sku=0806822 or Google Temperature labels If i
Electronics Forum | Sun Jun 06 13:03:14 EDT 2010 | whitewing
I'm sure you could buy everything you need to make your own stencils in-house for way less than 200K - lasercut or photochemical etch. If you have someone local with a typesetter of photoplotter , photoetch should be really cheap to set up. I've also
Electronics Forum | Mon Jul 01 13:19:55 EDT 2013 | emeto
I always look for a toe fillet if the design allows you to. Many times the pad design is close or exactly the size of the leads which makes people to touch it up right away. I told them hundred times not to but...Luckily I have 3D x-ray and I can tel
Electronics Forum | Wed Mar 12 10:04:20 EDT 2014 | globalpowerproducts
We had a SMT specialist come in and go over everything we were doing wrong! We were dipping the boards rather than spraying them, had the pre-heaters set way to low, the conveyor was going too fast, and the actual wave was in the machine the wrong wa
Electronics Forum | Wed Jun 06 02:59:11 EDT 2018 | buckcho
Mr. Evtimov, Koh Young and Parmi have this option in their SPC software. You can also choose either Volume, Area, position, height (both in um or %). Here is a screenshot from Parmi. Unfortunatelly i cant find my old Koh Young screenshots. Parmi has
Electronics Forum | Tue Oct 06 17:36:20 EDT 2020 | hearsehauler
Have used stencils for low volume paste printing for 18 yrs. New job uses jet printing (MY500). But machine is limited to .33mm dot size. Parts used here have pad sizes that are .25mm or smaller, so paste touches between pads when printed. Thankfully
Electronics Forum | Wed Oct 07 15:23:10 EDT 2020 | spoiltforchoice
MyCronic are literally the only ones in the market, Essemtec do Jet printing but make no attempt to sell it as a full printer replacement in the way MyCronic do. I was told by MyCronic "The MY500's are reducing in numbers now and spares support is co
Electronics Forum | Thu Jun 28 10:46:44 EDT 2001 | genny
Thank you. I'm sorry if I came across frustrated or anything, but I wasn't sure if people were ignoring the one question I kept asking or if, as you said, they just didn't know. Here's the deal. We are a small company rapidly growing into a larger
Electronics Forum | Tue Jul 27 10:37:47 EDT 1999 | John Thorup
| We are currently using a 65/35 solder for our wave process but are considering switching to a 63/37 for a substantial cost savings. No one here seems to know why we everused a 65/35 formulation in the first place. | I understand 63/37 to be pretty