Hi all, Process stability with large or complex nozzles can be improved by imbedding heater elements within the nozzle itself. This keeps the "nozzle, chimney, flow-well, etc." at a constant temperature irregardless of time between solder flow. Best Regards, Brad Vanderhoof AITI ----- Original Message ----- From: Ed Popielarski To: [log in to unmask] Sent: Saturday, May 10, 2003 7:38 AM Subject: Re: [TN] Solder Fountain Parameters Hi Gary, LTNS! You want to run the pump speed high enough to get a flow over each side of the nozzle (level is obviously important) but not so high you develop turbulence on the surface. I've seen some poorly designed nozzles that cannot achieve this and might take some "do-over" to get it right. Another thing is process repeatability, and in order to get an accurate "fix" on the wave height setting is to add a pump motor speed display to the machine. The pot and corresponding graticule provided by the manufacturer(s) isn't all that accurate to start with, and the speed control board can be messed with as well as drift over time. Give me a call one day when you have a free moment. You and I go back to the late 80's with Treiber. Regards, Ed Popielarski QTA Machine 10 Mc Laren, Ste D Irvine, Ca. 92618 Phone:949-581-6601 Fax: 949-581-2448 Cel: 949-337-2578 WWW.QTA.NET --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/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 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/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 -----------------------------------------------------