Electronics Forum | Fri May 05 11:11:05 EDT 2000 | Stefan Witte
The placement defect rate also depends on the shape of the components. 0402's have a higher defect rate than 0805's for example. If the board is very dense populated, chances are that a misplaced part knocks off another part and all of the sudden the
Electronics Forum | Sat May 06 06:52:31 EDT 2000 | Dane Stokes
Richard, On the large arpetures I have seen they have been divided into four smaller arpetures to cover the placement area to reduce the ammount of paste. Just tell them to divied the total area into quarters and decrease the size of the quarter pie
Electronics Forum | Wed May 03 13:56:14 EDT 2000 | Mark Charlton
Does anyone know a formula for determining my "Excess Capacity"? I know my machine's up AND down time, the effective placement rate, and my idle time. If my manager asks me what out "excess capacity" is, how do I use my "knowns" and calculate an ac
Electronics Forum | Thu Apr 27 21:11:00 EDT 2000 | Dave F
Ken: There is no complete package solution to the concerns you have. You need to weave you way through this project. I�m generalizing when: Placement machine OEM: * Knows their machine (your interests are served if this is the proper machine for
Electronics Forum | Thu Apr 13 13:02:03 EDT 2000 | Paul Peterson
Hi fellow problem solvers,... We suspect a planarity problem with our 6 mil wide flex circuit pads having height variance of up to 2 mils after print and reflow. This is contributing to a placement skew with our TAB bonder... Has anyone had any succe
Electronics Forum | Sun Mar 12 13:09:33 EST 2000 | Jeff Wilson
Jeff, The problem you are describing MAY be related to the push up pin setting on your component feeder units. Please verify that the push up pin height is set correctly for the feeder units, and the nozzle pick-up and placement heights are to the c
Electronics Forum | Wed Feb 23 16:38:41 EST 2000 | Michael Parker
I have experienced tombstone with one brand of 0603 capacitor. Swapping in another brand (actually two different brands to date) has stopped the tombstone. I have measured the parts (length, width and height). There does not appear to be any apprecia
Electronics Forum | Wed Feb 07 12:56:00 EST 2001 | jax
I' ll have to agree with Dave on this one. Just get the information from the Suppliers. The Glass plate, Aluminum board, Glass slugs, etc... are all used to determine if a calibration is needed or if it was succesful.( they can also give you offset i
Electronics Forum | Thu Feb 22 12:42:02 EST 2001 | moncav
Dear SMTneter's; I am looking for a few board manufacturers to evaluate a new product. This device is a tooling fixture that conforms to any board profile for support during single or double side printing or placement. It's clean, simple and very r
Electronics Forum | Thu Apr 12 00:43:38 EDT 2001 | zam_bri
Can anybody gimme some input on the problem I faced currently on 0402 Chip Resistor. At pre-reflow the component are placed nicely but at post reflow, we found the Resistor stands sideway ( both termination, the pad and componant are in contact, fun
