Homebrew PCBs

Note to self - no Samsung ML-2165 printer.

Donald.
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----- Original Message -----
> From: "godzilera" <yah.5.peteben@...>
> To: "Homebrew PCBs" <Homebrew_PCBs@yahoogroups.com>
> Sent: Monday, June 25, 2012 12:59:27 PM
> Subject: [Homebrew_PCBs] Re: Inconsistent scaling with Samsung ML-2165
> Hello everyone,
> thanks for the responses.
> 
> I forgot to mention that I was only getting scaling problems in the
> 'Y' direction. Speed of the paper through the printer is what affects
> this scaling.
> After a few tests, I have gotten much better results, at least with
> the HP photo paper. I figured that the inexpensive printer was
> struggling to drag the paper out of the bin and into the unit,
> especially since the paper path of this printer is not straight at all.
> So, instead of printing my PCB design at the top of the page, I asked
> the driver to flip the page upside down, so that the design now comes
> out at the bottom.
> I think the printer is struggling to pull out the page and slows down
> at the beginning. Once the paper hits the fuser, I think this
> stabilizes, and the bottom of the page comes out a the right speed. I
> think this is more pronounced with the thicker paper, as there is a
> one inch difference between the position of the PCB layout on a page
> of regular paper and photo paper. This seems to confirm that the
> thicker photo paper moves more slowly through the printer, at least
> initially.
> 
> Thanks,
> 
> 
> --- In Homebrew_PCBs@yahoogroups.com, "Dennis" <nojoeco@...> wrote:
> >
> >
> > I use multiple printers and suddenly all of them seemed to develop a
> > similar problem to yours at the same time.
> > Turned out it was my son's A/C cycling and pulling the power down on
> > that circuit. On my fastest printer you can actually hear the
> > printer slow in sync with the power drop. It shouldn't effect the
> > scaling but it did.
> > My oldest printer doesn't do this at all, so it tells me that
> > manufacturers are probably making the power supplies as cheap as
> > they can.
> > I've now got a power stabilizer thing for big home theaters and the
> > problem is gone.
> > You may also want to make sure there are no power saving or toner
> > saving settings turned on, no telling how the power or toner is
> > "saved"!
> >
> > --- In Homebrew_PCBs@yahoogroups.com, "godzilera" <yah.5.peteben@>
> > wrote:
> > >
> > > Although I have been making successful single-sided PCBs for a
> > > while now, I just recently decided to try making a double sided
> > > board with SMD (.5mm TQFP) parts. So, I went out and bought a new
> > > inexpensive Samsung ML-2165 printer. The problem I am having is
> > > getting the scaling right. It's inconsistent and varies from print
> > > to print. Plain paper works pretty good, but the Pulsar paper
> > > comes out too short. I tried adjusting the scaling in the Kicad
> > > print dialog, but it seems to come out either too wide or too
> > > short. Very frustrating, and I have wasted four sheets of TTS
> > > paper so far.
> > > I have a couple of boxes of HP glossy photo paper, so I may try
> > > that.
> > >
> > > Any advice?
> > >
> > > Thanks,
> > >
> > > Pete
> > >
> >