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
Electronics Forum | Fri Dec 02 16:26:00 EST 2011 | davef
Here's some recommendations from various companies: * http://www.sibex.com/pcbguidelines.pdf * http://www.carltonindustriesonline.com/Docs/Fiducial.doc * http://www.tracktronics.com.au/pdf/PicknPlace_Fiducials.pdf * http://microtronix.co.za/pcb_re
Electronics Forum | Fri Nov 25 15:52:40 EST 2011 | davef
"IPC-2221 - Generic Standard On Printed Board Design" talks to fiducials. Anther take on fiducials says they shall meet the following requirements. * Make fiducials 1 - 1.5 mm diameter circle. * Cover fiducials with tin. * Keep solder mask opening at
Electronics Forum | Mon Feb 22 05:39:58 EST 1999 | Scott Davies
We are currently using circle, cross and double-cross(#) fiducial patterns with SiPlace equipment. Most of the problems seem to occur when, in the case of a HASL fiducial mark, a PCB is topside reflowed, goes away for thru-hole and comes back for bot
Electronics Forum | Tue Dec 07 14:23:34 EST 1999 | JAX
Vahid, What type of error are you talking about? If you mean accuracy I would stick to round fiducials. As far as machines, the only question is about active component placement. For passive components Fuji(CP-series) is the way to go. O
Electronics Forum | Tue Aug 25 12:50:24 EDT 1998 | Lance Smalley
To see if the MV will recognize the marks, in the binary mode, when setting threshold (binary level), raise up the level until the edge of the mark starts to degrade. Write down the number. Lower the level until the fiducial starts to "bloom". Wri
Electronics Forum | Mon Jul 13 07:25:09 EDT 2009 | hcarrasco
Hi everybody, > We recently start to use an ultrasonic stencil cleaners for our stencils. > It' work well, but after some time, we saw a lot of fiducial that the black > epoxy have been partially or totaly remove. I want to know if someone h
Electronics Forum | Fri Nov 30 18:22:40 EST 2007 | mika
Hi Paul M, There are no silly questions but silly answers.. and here is maybe a few if I understand you correctly: If you consider place anything less than a 1.27mm (50mil) pitch component down or a chip less than a 1210, hey it maybe don't even work
Electronics Forum | Fri Jul 28 11:12:18 EDT 2023 | shrikant_borkar
Hi SimionR, Is Glue Process Dispencing or Glue Printing thru Stencil? if Its Dispencing Glue thru a Nozzle then its a controllable process. I have performed it thru HDP-3 Panasonic. Placement of Glue either one DOT or Process must be aligned with th
Electronics Forum | Fri Jul 09 18:36:48 EDT 2010 | rway
We don't use flex pcbs but have the same issue here. Most of our pcbs are HASL finish. I have looked at silver and gold immersion and both look really good under my color camera on my AOI. However, gold is more pricey. There is no additional cost
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