Electronics Forum | Mon Mar 01 20:53:28 EST 2004 | Ken
How does a fiducial work? I am going to venture a guess as how it ralates to the parts you are trying to place... A PCB fiducial is a landmark. The fiducial tells the machine where the board is located in the machine. A single fid can only deter
Electronics Forum | Tue Mar 02 22:40:52 EST 2004 | pdeuel
To clean up other replys I will add that some most all machines have global correction. Most placements are an off sets from pcb 0,0 usually the lower left corner of the board. When the machine locates the fiduitals and these fids are not exactly whe
Electronics Forum | Thu Dec 09 13:04:25 EST 1999 | alan
I have always been taught to read fiducial marks that are diagonally opposed to each other. I am sure this is to get a better correction for skew. My question is if you use two fiducial marks that are parallel to each other even though placement mi
Electronics Forum | Thu Dec 09 13:41:13 EST 1999 | JAX
IF YOU READ FIDUCIAL MARKS THAT ARE PARALLEL TO EACH OTHER THE PLACEMENT WILL NOT BE AS GOOD. ONE OF THE PROBLEMS WITH THIS METHOD IS IT COMPLETELY THROWS OUT THE CONCEPT OF BOARD STRETCH IN ONE AXIS. THE OTHERS MAY VARY DEPENDING ON WHAT MACHINES YO
Electronics Forum | Sat Aug 22 09:59:44 EDT 2015 | linux
Hello all, Can someone tell me the step by step procedure to check xo,yo, mark read position using Fuji board. Cp6 Fuji.
Electronics Forum | Thu Dec 09 15:08:43 EST 1999 | Andy Yates
If possible, three or more fiducials is optimal. That way scale, translation and projection can be estimated. Andy
Electronics Forum | Sat Dec 11 11:01:11 EST 1999 | Mark W.
In answer to your question no. Fiducials should always be as far apart from each other in both directions (X,Y) as possible. This will allow ANY placement machine to calculate the EXACT location and rotation of the PCB, and therefore correct the moun
Electronics Forum | Tue Jan 09 01:39:41 EST 2018 | jaisabaigroup
Is there any regulation I can check on the Solder mark thickness specification? Or it is depends on PCB manufacturer's design.
Electronics Forum | Tue Jan 30 08:21:02 EST 2007 | GS
Please who can help me? I am looking for fiducial (cross shape) mark (target mark? Swiss mark?..)specifications used when COB wire bonding on PCB laminate. Pad pitch should be 250umm may be 220umm?). Mainly need to know which are the tolerances
Electronics Forum | Wed Jan 31 17:30:54 EST 2007 | GS
Thanks a lot flipit, I am not directly involved in this "problem" but is my friend that have his CM rejecting PCBs because it says the "+" mark (spokes lengths) are out of tolerances. It seams CM bonder's require tolerance +/- 0,05(? not sure). I d
