About these rules for the silkscreen, are they only for SMD? I am under the impression it does not apply well to THT components, for example an electrolytic capacitor where we often see a circle with one half full to indicate polarity. This would be partly hidden once the board is assembled.
On Thu, Jun 5, 2014 at 5:24 PM, Bernd Wiebus <[email protected]> wrote: > Hello Pawel. > > Am Montag, den 02.06.2014, 09:57 +0200 schrieb Paweł Dras: > > > With pads over the silk is the same situation, in many cases after > > silk erasure by solder mask it don't looks good on final product. > > It is not only about "looking good". Silkscreen print over Pads is > nasty, if someone forgets to distract the pads from the silkscreen. > It may be expensiv, but shure will cost time at last..... > > If you place your silksceen across pads, and erase it over the pads, > your silkscreen will be chopped. so better you chopp it by yourself and > make it looking good. > > > > Another problem is to wide placed silk. > > Think about, that you perhaps need place for rework tools. > And wave soldering needs more space around the devices than reflow. > > Some years ago, KiCad insisted in thik lines, because you could not > change the wide of silk screen lines. Of course, it was possible by > editing the library file by hand. > > But this thick lines are sometimes needed, because a manufacturer who > use a real silk-screen printing process and not a optical process, meeds > the wide lines. > > So bee careful, if you use thin lines. Think about the spacing. > > > I have a question, can be ref and value placed as in my attachment or > > should be above and below resistor? > > It is a bad idea, to place text under devices, because it cannot be read > anymore, if the device is once mounted......so i put text to this > positions, only if there is nowhere a better place for the text. > > Personally, i switch the value at layouts and silkscreens to invisible, > and keep only reference as a designator. > > Having reference AND value at the layout costs place and is terrible to > read. So better i use only the reference, and the BOM of course. ;O) > > For big boards with few devices, it migt be ok to have both, but for > growing sisze, it will get diffcult to read. > > the exeption is, if you use the silk-screen not as an silk-screen at the > board, but as an assembly layer. So you are not stuck to board > dimensions, but can make DIN A2 prints for boards the size of a small > stamp. ;O) > > With best regards: Bernd Wiebus alias dl1eic > > > > > > -- > Mailing list: https://launchpad.net/~kicad-lib-committers > Post to : [email protected] > Unsubscribe : https://launchpad.net/~kicad-lib-committers > More help : https://help.launchpad.net/ListHelp >
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