Subject:
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Re: the LEGO CNC-Machine
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Mon, 3 Sep 2007 19:36:19 GMT
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Viewed:
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19233 times
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I really like your design with the X and Y gearbox in a single unit. That is
very well done. Your slider design is also very good. The table is supported
in all directions. You have made it simple and effective. Good engineering!
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thanks! it’s nice to get that kind of feedback from someone who’s not new to
lego mills :)
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Your Z axis column will have to be very large to provide cutter coverage
over the work area of X and Y. It will need to be firmly attached to the
foundation of X and Y.
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yes. you can see it in my diagrams again, the cutter hangs over the table pretty
far:
i’m not sure yet how exactly i will manage to make it stay there without
excessive vibration or deformation of the frame. the ideal solution would be a
tower built of classic lego bricks, that would be really stiff. bad thing i
don’t have too many of those. i hope i can come up with a nice technic
structure. you can see a little test i made standing behind the table in the
video, those skeleton-like technic beams. that’s more or less the size it will
need.
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Looking good! Thanks for posting the movie. I have never tried to post to
YouTube. What format do they accept for movies?
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i made that movie in imovie hd, but you can upload pretty much anyting, mpg,
avi, mov, ... i read it somewhere, i need to find the page.
something i noticed is that in my design the y axis gear rack (the one i mount
on top in the video) presses really tightly against the gear that drives it, and
i doubt that the normal technic motor will be able to handle it. is there any
site with tips on the geometry of the gear rack? like, how to build a structure
that makes it mesh nicely with gears, without too much backlash but not too
tightly? i haven’t been able to figure it out... thanks!
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Message has 1 Reply:
 | | Re: the LEGO CNC-Machine
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| "daniel" <daniel.formatc.at.gmail.com> wrote in message news:Jnt54J.Jpy@lugnet.com... (...) I liked the technic beams because I could lock them together. I imagine double wide bricks can make a good foundation. Put an ocassional beam in to allow (...) (17 years ago, 3-Sep-07, to lugnet.robotics.rcx)
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Message is in Reply To:
| | Re: the LEGO CNC-Machine
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| "daniel" <daniel.formatc.at.gmail.com> wrote in message news:Jnszy4.7qA@lugnet.com... (...) very well done. Your slider design is also very good. The table is supported in all directions. You have made it simple and effective. Good engineering! (...) (17 years ago, 3-Sep-07, to lugnet.robotics.rcx)
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