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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Sun, 2 Sep 2007 18:37:22 GMT
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Viewed:
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17704 times
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"daniel" <daniel.formatc.at.gmail.com> wrote in message
news:Jnqvwx.p6G@lugnet.com...
> by open loop i'm guessing you mean no sensor feedback whatsoever?
Right!
Program = x+1.005, Y-2.000, F36 (hope it makes it)
i have two
> pole reversers (for x and y) and one lego rotation sensor, so at least
> those 3
> axes should have positioning systems.
I had forgotten that you can use a Lego Fiber Optic unit for a rotation
sensor. 8 count per rev.
http://www.ozbricks.com/bobfay/miboSenRt.jpg
There is one in Mibo's left hind leg. about half way up the leg. there are 8
tiny holes to insert the fiber optics. This could be very useful for
sequencing the tool drum.
Also the light sensor has been used by rotating a disk with light and dark
segments in front of the sensor. You may have to build a second machine
that is bigger than your plan. Actually cutting material adds a new level of
excitement to the project.
I built a few that would not cut material. They did not have rigid axes to
support the pressure of cutting. You will learn many things as you engineer
your mill.
Bob
--
http://www.ozbricks.com/bobfay
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Message has 1 Reply:
 | | Re: the LEGO CNC-Machine
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| i uploaded a little video of the first tests with the x and y axes. check it out here: (URL) trying out wax and soap as cutting materials, i'll report again when i'Ve tested some more :) (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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| (...) by loaded, you mean it carries the workpiece and not the tool? (...) ooh i see now, so that's the anti-backlash gearbox!! awesome, i would never have thought of that. but i don't know if i will be able to integrate that mechanism into my (...) (17 years ago, 2-Sep-07, to lugnet.robotics.rcx)
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