Electronics Forum | Thu Jun 28 10:46:44 EDT 2001 | genny
Thank you. I'm sorry if I came across frustrated or anything, but I wasn't sure if people were ignoring the one question I kept asking or if, as you said, they just didn't know. Here's the deal. We are a small company rapidly growing into a larger
Electronics Forum | Sun May 23 07:13:56 EDT 1999 | Scott Cook
| Has anyone had any experience or data using vibration during the reflow process. | We introduced a vibration device attached to the fixed rail on a Vitronics reflow oven. The reason was to prevent skewing on large PLCC devices. The process worked v
Electronics Forum | Wed Apr 10 13:20:36 EDT 2002 | barryg
I am curious how you measure your printed paste thickness. We are considering doing the same. As it is now we assure we have squeegee pressure and speed controlled, have not actually measure the printed paste thickness.
Electronics Forum | Wed Apr 10 11:45:08 EDT 2002 | mwoodall
We measure the thickness of solder paste printed onto PCBs as a control of the printing process. Generally 6 thou stencils are used and give between 6.2 and 6.8 thou. What thicknesses do other users get? Cheers! Mark
Electronics Forum | Thu Apr 11 04:03:28 EDT 2002 | mwoodall
The Alpha metals Hi Check 500 is used to measure paste deposit thickness. The paste height is found from a micrometer reading determined by focussing a beam of light on a track adjacent to a paste deposit and then onto the solder paste. I've measure
Electronics Forum | Wed Apr 10 22:35:59 EDT 2002 | davef
How do you assure you "have squeegee pressure and speed controlled"? Search the fine SMTnet Archives for background on measuring paste thickness.
Electronics Forum | Tue Jul 19 12:03:34 EDT 2005 | cyber_wolf
CLampron, There is no place for PCB thickness in a Mydata program. The board thickness is of no consequence.(As long as the thickness is uniform across the entire board) When you run a program, the Z axis touches the surface of the board to determin
Electronics Forum | Tue Jul 19 11:53:04 EDT 2005 | CLampron
seaK, Check your PCB Thickness check in your program. See if it is checking the PCB at this location. Each board the machine will check to find the baseline thickness of each board run. It does this with a tool. I'm thinking this may be it because I
Electronics Forum | Wed Apr 10 22:46:04 EDT 2002 | davef
On SMTnet, we've discussed the the frailties of controlling paste height, when volume is a more telling measure. Sometimes if you seperate too quickly, the paste tries to stay attached to the aperture walls. This creates a 'U' shaped deposit with r
Electronics Forum | Tue Jul 19 12:10:04 EDT 2005 | CLampron
Sr. tech, The mount tool test position is what I am refering to. The function of this is to determine the placement plane of the board. The mount plane will change if the board is thicker so thickness is relavent. regards Chris
