On 16 May 2017, at 20:59, Ken Strauss wrote: >> -----Original Message----- >> From: Marcus Bowman [mailto:marcus.bow...@visible.eclipse.co.uk] >> Sent: Tuesday, May 16, 2017 3:46 PM >> To: Enhanced Machine Controller (EMC) >> Subject: Re: [Emc-users] new thread inspired by Christophers question > about >> 3d printer sliceing SW. >> >> >> On 16 May 2017, at 20:18, Chris Albertson wrote: >> >>> I think using a screen only works on small size printers. Bigger > screens >>> lack resolution. The phones and tablets have about 300 pixels per > inch. >>> >>> >>> Look at monitors. The new "standard" is 4K. If it is 20" across that > is >>> 4000/20 pixels per inch or 200 pixels per inch. Not as good as an > Apple >>> iPhone that has about 300 per inch. Then as monitors get bigger they >>> still have the same 4K pixels. >> >> Interesting how 'standards' develop, I work with two Apple Cinema displays >> which must be 15 years old. Both have 4K pixels. So the new 'standard' is >> actually very old indeed. >> That suggests that an effective 'standard' might be a fixed pixel density > of, say, >> 300 pixels per square inch (same as a good quality printed image) but the >> larger the screen area the more the absolute number of pixels, to maintain > the >> overall resolution. >> That would make sense for an application like 3D printing, where the >> resolution should stay the same no matter the size. >> >> Gene might correct me, but I reckon the number of pixels and the overall > size >> of the screen is a bit of a smokescreen. You need to push a larger screen >> further away from you to view it properly, so the effective resolution is > not the >> number of pixels, but the number of pixels at a particular distance. >> Again, not useful when applied to 3D printing, unless you want to make the >> surface of the object appear smoother than it really is. >> >> Marcus >> > > In the interests of accuracy: "...an effective 'standard' might be a fixed > pixel density of, say, 300 pixels per square inch (same as a good quality > printed image)" I think that you meant 300 pixels per inch or 90,000 pixels > per square inch. > Yes; I certainly do. Thanks.
Marcus > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
