Electronics Forum | Wed Jan 23 13:39:04 EST 2008 | davef
Ventilation rates express the flow rate of outside air brought into a building and are typically normalized by the volume of space being ventilated (air changes per hour), by the area of the floor being ventilated (cubic feet per min (cfm) per ft2) o
Electronics Forum | Tue Feb 12 14:30:20 EST 2008 | rlpearson
Like most things - "it depends". There just isn't a simple formula for applying general air exchange rates. Your baseline should be doing some air quality (industrial hygiene) testing to see what types of exposures the workers have. THEN, you can
Electronics Forum | Tue Jan 22 16:01:03 EST 2008 | jmelson
The P&P machine uses very modest power when idling. It draws burst of power when accelerating the gantry. So, the yearly power consumption is going to be a LOT less than nameplate figures. If it is largely air-driven, then you have to factor in th
Electronics Forum | Fri Sep 26 16:34:16 EDT 2008 | aqueous
Its not likely your air quality that lowers the test solution's resistivity. Maintaining 60 M-Ohm requires almost constant circulation through DI resin beds. Just natural CO2 (Carbon dioxide) absorbed by the test solution will lower the resistivity
Electronics Forum | Mon Sep 29 12:31:51 EDT 2008 | omid_juve
Thanks but we have QFP208 package here that after the reflow soldering during to the bad coplanarity of these devices some pads doesn`t have enough solder or not soldered. so we decided to use a qfp nozzle that can be placed on a QFP pads and use a
Electronics Forum | Thu Oct 02 08:24:32 EDT 2008 | rway
If you want to go really cheap, you could try Pace Systems. You can get a three channel system, hot air, desolder and soldering iron. Or any other combination handpieces that they offer, for around $3K. They also have power supplies with a single
Electronics Forum | Wed Feb 04 10:38:38 EST 2009 | davef
Typical Protective Equipment Includes: * Safety glasses: While you're waiting for others to reply, search the fine SMTnet Archives to find threads like: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=54221 * Fire Resistant Smock * Face Sh
Electronics Forum | Thu Aug 20 00:16:56 EDT 2009 | padawanlinuxero
Hello I am having a problem with the flux in the wave solder, I am using a sonoflux 9000 this machine uses a air knife to spray the flux, it creates a mist that when hits the air knife pulls the mist up to the pallet where the board is, but for som
Electronics Forum | Wed Aug 26 05:13:01 EDT 2009 | grahamcooper22
Hi, as you are using Vapour phase reflow what temperature is the boiling point of the solvent you are using ? If it is @ 250 C then you should be getting everything hot enough to melt the ball and solder paste together. If this is the case then your
Electronics Forum | Thu Feb 11 15:07:49 EST 2010 | hegemon
With regards to the rework, size and mass of the PCBs is important, in addition to the size of the components that are to be reworked. You might be in the game with $6K (APE Chipmaster Hot Air machine with Preheater or similar setup) if you have sma
