Path: utzoo!utgpu!water!watmath!clyde!bellcore!tness7!killer!osu-cis!tut.cis.ohio-state.edu!mailrus!purdue!decwrl!ucbvax!utzoo.UUCP!henry From: henry@utzoo.UUCP Newsgroups: comp.laser-printers Subject: Re: Tolerances in the resolution of laser printers Message-ID: <8806201720.AA01226@brillig.umd.edu> Date: 7 Jun 88 01:53:45 GMT References: <8805301555.AA28908@brillig.umd.edu> Sender: daemon@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 13 Approved: laser-lovers@brillig.umd.edu > I once measured a deviation of almost 3% in the resolution of a laser > printer...the manufacturer put the blame on the crystal resposible for the > sweep of the laser beam... crystals don't deviate in frequency that much... It is indeed the crystal that is to blame, but in a more subtle way than you think. The problem is not that the crystal is off its assigned frequency; the problem is that the assigned frequency is not quite the right one for the printer! Rather than get a custom crystal done to exactly the right frequency, the manufacturer has settled for the nearest standard crystal. This is common. Henry Spencer @ U of Toronto Zoology {ihnp4,decvax,uunet!mnetor}!utzoo!henry