We're using water in a polypropylene sink with a high pressure hose to clean mis-prints and the stencils. This sink is tied in to our in-line aqueous cleaner and closed loop waste treatment system. The incoming water to the sink comes from the pre-wash (dirtiest) section of our in-line cleaner, and the waste, after going through a particulate filter to remove solder powder, goes to the waste treatment system and is returned to the in-line cleaner. This works very well. Jim Marsico Senior Engineer Production Engineering AIL/Electronics Systems Group An EDO Company [log in to unmask] <mailto:[log in to unmask]> -----Original Message----- From: bbarr [SMTP:[log in to unmask]] Sent: Thursday, May 03, 2001 8:18 AM To: [log in to unmask] Subject: Re: [TN] Unusual Cleaning Operation- Help! Your comments about ultrasonics has got me thinking- I am looking for a new stencil cleaner that would also be used for cleaning misprinted boards. I am using water-soluble paste. The stencil cleaners I see on the market today all seem to employ ultrasonics. Since many of our boards use crystals, oscillators, etc., I am concerned about subjecting them to ultrasonics if I have to clean a misprint on side 2 of the board after side 1 is completed. I am wondering what others in a similar situation are using as a stencil/misprint cleaner for water-soluble. Bob Robert Barr Manufacturing Engineering Formation, Inc. -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Brian Ellis Sent: Thursday, May 03, 2001 2:43 AM To: [log in to unmask] Subject: Re: [TN] Unusual Cleaning Operation- Help! Brian wrote: (snipped) Ultrasonics: before adopting ultrasonics in production, check the reliability of cleaned assemblies. There are some components that don't like them at all. Especially ceramic-cased semiconductors, quartz crystals, some multilayer ceramic capacitors etc. The problem is that they may not cause the component to fail in the immediate but to weaken it so that it fails prematurely after a number of days/weeks/months/years of service. ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------