Electronics Forum | Mon Feb 20 20:47:59 EST 2006 | davef
We assume your stencil is clean. So, try: * Reduce stencil separation speed. * Reduce squeegee pressure. If the pressure is not proper, excess number of particles are stuffed into an aperture and inner pressure / friction among particles increase, an
Electronics Forum | Mon Jun 19 07:50:03 EDT 2023 | tommy_magyar
What I would ask before actually answering your question is, what is the smallest footprint/pad which can be pressure dispensed/jet printed? Regards, Tom.
Electronics Forum | Mon Jun 19 10:30:30 EDT 2023 | smtusa
Jet printing can reach 80um, whereas contact dispensing is 0.3mm I believe. 0402 pads are 0.6x0.5mm.
Electronics Forum | Wed Apr 19 10:27:30 EDT 2006 | russ
Look at your paste specs, they give you recommended starting points relating to speed and pressure. Dave F is right, it is usually about 1 pound per linear inch of squeegee length. Speed for finepitch printing should be started at about 1in/sec. T
Electronics Forum | Sun Jun 18 19:59:28 EDT 2023 | smtusa
Seeing this graphic has me rethinking solder paste jetting as alternative to stencil printing. It seems it's only 2-3x faster 80k points per hour vs 28k. Wouldn't it be better to get 10 time pressure dispensers vs 1 solder jet?
Electronics Forum | Fri Mar 11 04:12:28 EST 2016 | grahamcooper22
Please can any users of the Rheopump or Enclosed Print Head unit tell me what cartridge pressure setting they use when using lead free paste....many thanks Graham
Electronics Forum | Tue Dec 23 15:06:25 EST 2008 | evtimov
It depends how manual is the printer. you need to control pressure and speed. If you control both by hand, it is difficult to discuss results. If the pressure is controlled by the printer, than you should be able to do it by one deposit. Also is the
Electronics Forum | Mon Nov 11 21:19:06 EST 2019 | dekhead
Knead pressure, is normally at or slightly lower (maybe 25%) than print pressure...
Electronics Forum | Fri Aug 28 14:53:16 EDT 2020 | dekhead
It is not abnormal for the first 2-4 prints to be compensation strokes where the print pressure stablises to its set pressure, ideally the variation is
Electronics Forum | Thu Sep 26 20:25:06 EDT 2002 | davef
When we DOE a board, we use the following independent print variables: * Print pressure * Print speed * Separation speed * Aperture orientation * Squeegee hardness
