Check-out the small flat bed plotters A to B size. Many years ago I used the
small HP flatbed plotters to direct print PCB artwork at 2X then photo
reduce. That was Mid-1980's but they did .001 resolution. The nice thing is
they are dirt cheap and built like a tank. A quick look on ebay looks like
$100 is the going price. So with a the flatbed no worries about the PCB
fitting.
From:
Homebrew_PCBs@yahoogroups.com [mailto:
Homebrew_PCBs@yahoogroups.com]
On Behalf Of Mark Lerman
Sent: February 04, 2011 2:18 PM
To:
Homebrew_PCBs@yahoogroups.comSubject: RE: [Homebrew_PCBs] Plotter Information
Yes, I had heard about the indentation. I assume the indents are on
the bottom so that I could mount the pcb on paper or cardboard?? Can
a pcb fit mechanically without modification?
Mark
At 04:19 PM 2/4/2011, you wrote:
>Note:
>The pen moves in the X plane and the PAPER moves in the Y plane. A PCB is
>rigid so you would need to attached to the equivalent of a paper carrier.
>
>The plotter technology is clever with the grit wheels actually indenting
the
>paper on the first pass so the paper on future passes back and forth track
>the previous indented markings.
>
>A long time ago I played around with this idea but I was using a fiber
optic
>cable to keep the laser stationary and the weight down for the pen
assembly.
>Today lasers are much smaller.
>Bertho
>==============================
>
>From: Mark Lerman Sent: Friday, February 04, 2011 15:38
>At 03:25 PM 2/4/2011, you wrote:
>
> >--- On Fri, 4/2/11, Mark Lerman <mlerman@...
<mailto:mlerman%40ix.netcom.com> > wrote:
> > > From: Mark Lerman <mlerman@...
<mailto:mlerman%40ix.netcom.com> >
>homebrew_PCBs@yahoogroups.com <mailto:homebrew_PCBs%40yahoogroups.com>
> > > Date: Friday, 4 February, 2011, 18:52
> >
> > > work. Questions:
> > >
> > > 1 - How good is a plotter's resolution?
> >
> >Just a quick answer: the basic resolution of HPGL, the
> >HP plotter language that nearly all plotters use, is
> >40 steps per mm. So, if you add 40 to a co-ordinate,
> >the pen moves by 1mm. Now, I don't know if this is
> >the mechanical resolution of the plotter, but it sets
> >an upper limit to resolution, at least.
>
>Thanks - that would be .001 inch (1 mil) per step, more than adequate!
>Mark
>
>
>
>
>------------------------------------
>
>Be sure to visit the group home and check for new Links, Files, and Photos:
>http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>
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