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9778Re: [PPLetterpress] Re: Material to make large printing blocks

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  • Lisa Davidson
    May 4 10:02 AM
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      I can't believe all these printers using steamrollers! When did that
      start happening?


      On May 4, 2008, at 9:20 AM, briannqueen wrote:

      > Erik,
      > Thank you for posting that video. Do you use the v-bit for all
      > your cutting or do you start with end mills? Also what programs are
      > you using? I have a friend that makes brass dies for foil printing
      > and he uses ArtCAM. I've watched him program images and text a number
      > of times and it seemed fairly simple. The cost of ArtCAM of course is
      > a problem.
      > I just acquired a piece of Corian after hearing from another
      > artist that it prints well. Other than its cost it seems to be the
      > perfect candidate since it's designed to be machinable. Here in North
      > America it's only sold to authorized fabricators who don't normally
      > sell it in sheet form. A laminate of 6mm Corian and MDF planed to
      > type high could be the perfect match combined with CNC technology, no
      > variation in qualities or grain to worry about. I see on Wikipedia
      > that Corian has several competitors, who I'm guessing may be cheaper.
      > I'm also experimenting with 3mm white styrene sheet laminated to MDF
      > which is considerably less expensive.
      > Keep us posted on your progress and thank you for the pictures and
      > video, they have inspired me!
      > Brian
      > --- In PPLetterpress@yahoogroups.com, "Erik Desmyter"
      > <erik.desmyter@...> wrote:
      > >
      > > I have also been experimenting with a CNC-router to make large size
      > blocks
      > > or plates to print from on on my traditional iron handpresses. I
      > can say
      > > that this computer to plate technology has some potential &
      > limitations and
      > > there are many variables & tolerances in tools, software, material
      > & machine
      > > which make everything rather complex. The X, Y, Z axis feed speeds,
      > the
      > > router speed, the flatness of the material (no bowing allowed), the
      > angle &
      > > sharpness of the routing bits and the 3-dimensional software
      > working from 3D
      > > vectors isn't easy in combination with the specifics of letterpress
      > type &
      > > inking.
      > >
      > > I experimented with different materials and had the best results
      > with
      > > expensive materials like Corian (acrylic stone) but working in wood
      > is fun
      > > but challenging as every kind of wood has different
      > characteristics. Routing
      > > speeds should be lower to avoid heating up or burning the wood but
      > avoiding
      > > a burr or damaged edges isn't always easy because high routing
      > speeds just
      > > give the best sharp edges. Similar story on the X, Y & Z speeds,
      > when you go
      > > too fast quality goes down and when you go to slow the wood gets
      > dark and
      > > starts to heat up. And making a large plate with slow speeds takes
      > hours...
      > > I have just made a small movie and some photos on an experiment in
      > beech,
      > > see links below.
      > >
      > >http://www.youtube.com/watch?v=Tk4QmaU4JIg
      > >
      > >http://www.flickr.com/photos/desmyter1856/sets/72157604867473339/
      > >
      > > For very large plates I guess a good quality MDF would be good but
      > I haven't
      > > tested this yet. I am always interested in experiences from other
      > folks
      > > working in this direction with CNC technology.
      > >
      > > Best regards,
      > > Erik Desmyter
      > > Gent, Belgium
      > > erik.desmyter@...

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