Hi Al, It might be worth considering adding one or two frames to allowing for buffering between stages. In addition, in my experience you almost always end up with a few fixtures being out of service once they start to age - it's best to get a couple of extra fixtures to cover for this eventuality. Justin Braime ------------------------ Process Engineer Compuspec Industries Ltd Auckland, New Zealand [log in to unmask] ----- Original Message ----- From: Alan Kreplick To: [log in to unmask] Sent: Thursday, March 16, 2000 9:15 AM Subject: [TN] Wave Solder Fixture Justification Hello All: Anybody out there have a rule-of-thumb or a formula used to determine how many wave solder fixtures to purchase? I'd like to keep the line going by having: 1 fixture being loaded with a pcb, 2 or 3 fixtures in the machine, 1 fixture being unloaded, and 2 or 3 in the cleaner (I like to clean - OA flux - after every pass). Using the above sample, 6 to 8 wave solder fixtures would be required. Thanks in advance, Al Kreplick Sr. Mfg. Eng. Teradyne, Inc. 978-370-1726