 | | Re: the LEGO CNC-Machine —Daniel Rojas
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| | | (...) indeed, i agree! (...) i can't quite picture what you mean. could you upload a drawing or something? the animation you sent is good, actually the up/down movement it makes could be the z-axis itself, saving me another motor (not the tool (...) (17 years ago, 30-Aug-07, to lugnet.robotics.rcx)
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| | | | | Re: the LEGO CNC-Machine —Robert G Fay
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| | | | | "daniel" <daniel.formatc.at.gmail.com> wrote in message news:JnL3ox.7r9@lugnet.com... (...) (URL) Hope I did this right. Bob (17 years ago, 30-Aug-07, to lugnet.robotics.rcx)
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| | | | | Re: the LEGO CNC-Machine —Robert G Fay
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| | | | "daniel" <daniel.formatc.at.gmail.com> wrote in message news:JnL3ox.7r9@lugnet.com... (...) As you can see, I do not know how to get "deep links" on Brick Shelf. If I figure it out I will post the links again. The tools can ride a disk in front of (...) (17 years ago, 30-Aug-07, to lugnet.robotics.rcx)
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| | | | | | Re: the LEGO CNC-Machine —Daniel Rojas
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| | | | ok, now i understand what you mean. the problem is that this setup could be difficult for long axes, i guess the axle with the worm gears would flex too much... (...) exactly what i was thinking. that's the way the machines i've seen change their (...) (17 years ago, 31-Aug-07, to lugnet.robotics.rcx)
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| | | | | | Re: the LEGO CNC-Machine —Robert G Fay
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| | | | "daniel" <daniel.formatc.at.gmail.com> wrote in message news:JnMwFu.CMs@lugnet.com... (...) I like the worm for a drive. It provides the best ratio and the least backlash. It also acts as a brake while the slide is under the pressure returned by (...) (17 years ago, 31-Aug-07, to lugnet.robotics.rcx)
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| | | | | | Re: the LEGO CNC-Machine —Daniel Rojas
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| | | | (...) 16t gear to the gear rack on the bottom of the table. also, the z axis seems to use an idler gear. that's exactly the setup i've built, you can see it here: (URL) top left, next to the tool changer idea (right next to the tiny word "tool"). i (...) (17 years ago, 1-Sep-07, to lugnet.robotics.rcx)
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| | | | | | Re: the LEGO CNC-Machine —Robert G Fay
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| | | | "daniel" <daniel.formatc.at.gmail.com> wrote in message news:Jnp0Cy.2CJ@lugnet.com... (...) This X axis gear box is loaded so there is no backlash. The 16T gear on the right side has a hole through it and is fixed to the shaft with a serrated half (...) (17 years ago, 1-Sep-07, to lugnet.robotics.rcx)
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| | | | | | Re: the LEGO CNC-Machine —Daniel Rojas
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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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| | | | | | Re: the LEGO CNC-Machine —Robert G Fay
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| | | | "daniel" <daniel.formatc.at.gmail.com> wrote in message news:Jnqvwx.p6G@lugnet.com... (...) Right! Program = x+1.005, Y-2.000, F36 (hope it makes it) i have two (...) I had forgotten that you can use a Lego Fiber Optic unit for a rotation sensor. 8 (...) (17 years ago, 2-Sep-07, to lugnet.robotics.rcx)
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| | | | | | Re: the LEGO CNC-Machine —Daniel Rojas
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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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| | | | | | Re: the LEGO CNC-Machine —Robert G Fay
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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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| | | | | | Re: the LEGO CNC-Machine —Daniel Rojas
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| | | | (...) thanks! it's nice to get that kind of feedback from someone who's not new to lego mills :) (...) yes. you can see it in my diagrams again, the cutter hangs over the table pretty far: (URL) i'm not sure yet how exactly i will manage to make it (...) (17 years ago, 3-Sep-07, to lugnet.robotics.rcx, FTX)
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| | | | | | Re: the LEGO CNC-Machine —Robert G Fay
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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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| | | | | | Re: the LEGO CNC-Machine —Robert G Fay
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| | | | "Bob Fay" <rgfay@earthlink.net> wrote in message news:Jnt8MF.n84@lugnet.com... (...) This is one of mine. Note the left worm is out if sequence by 1/4 turn with the other two. this is putting pressure on the dual racks to remove the backlash. (URL) (...) (17 years ago, 3-Sep-07, to lugnet.robotics.rcx)
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| | | | | | Re: the LEGO CNC-Machine —Daniel Rojas
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| | | | the motor in the movie is called a "power motor", you can read about it here: (URL) the large black one with red axleholes. i'll be using it as the spindle. i guess the gearing in my axes is still too fast for the cutter, if i have to redesign the (...) (17 years ago, 4-Sep-07, to lugnet.robotics.rcx)
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| | | | | | Re: the LEGO CNC-Machine —Robert G Fay
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| | | | "daniel" <daniel.formatc.at.gmail.com> wrote in message news:Jnu7yv.K26@lugnet.com... (...) current than the RCX can supply. The smaller geared motors have a much slower rpm at their output. (17 years ago, 4-Sep-07, to lugnet.robotics.rcx)
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| | | | | | Re: the LEGO CNC-Machine —Daniel Rojas
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| | | | (...) right, that's why i'm planning to have one rcx output drive a polarity switch that connects the power motor to a normal battery box / 9v adaptor without current limiter. (17 years ago, 4-Sep-07, to lugnet.robotics.rcx)
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| | | | | | Re: the LEGO CNC-Machine —Robert G Fay
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| | | | "daniel" <daniel.formatc.at.gmail.com> wrote in message news:JnuoJz.86D@lugnet.com... (...) I am trying to see this in my head. Your driving a polarity switch with a motor and the switch will control the power motor? Is this on each axis? I am (...) (17 years ago, 4-Sep-07, to lugnet.robotics.rcx)
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| | | | | | Re: the LEGO CNC-Machine —Daniel Rojas
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| | | | (...) no no, i will only use the indirect control for the main spindle, which will use the power motor. the axis drives will use normal technic motors (from the mindstorms set). right now i'm designing some cutters, see my other thread in the (...) (17 years ago, 4-Sep-07, to lugnet.robotics.rcx)
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| | | | | | Re: the LEGO CNC-Machine —Robert G Fay
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| | | | "daniel" <daniel.formatc.at.gmail.com> wrote in message news:Jnuwon.JGG@lugnet.com... (...) Glad to hear that! Of course, I am somewhat disappointed. I thought you would come up with some really awesome design. (...) solution. Feed rate vs chip (...) (17 years ago, 4-Sep-07, to lugnet.robotics.rcx)
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| | | | | | Re: the LEGO CNC-Machine —Robert G Fay
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| | | | | "Bob Fay" <rgfay@earthlink.net> wrote in message news:Jnv1B9.4zC@lugnet.com... (...) Daniel, I posted one of my unknown machines to youtube. This one would not cut any material. The movie is very bad as I did not have a digital camera at that time. (...) (17 years ago, 5-Sep-07, to lugnet.robotics.rcx)
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| | | | | | Re: the LEGO CNC-Machine —Daniel Rojas
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| | | | I>> (...) i have the design in my head, i just need three power motors and another rcx :) (17 years ago, 5-Sep-07, to lugnet.robotics.rcx)
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| | | | | | Re: the LEGO CNC-Machine —Robert G Fay
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| | | | "daniel" <daniel.formatc.at.gmail.com> wrote in message news:Jnww91.2oG@lugnet.com... (...) What will drive those big motors? (17 years ago, 6-Sep-07, to lugnet.robotics.rcx)
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| | | | | | Re: the LEGO CNC-Machine —Daniel Rojas
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| | | | (...) i will drive the spindle motor using a 9v adaptor, like the ones i use for my rcx and scout ( (URL) ), so i won't run out of juice. (17 years ago, 6-Sep-07, to lugnet.robotics.rcx)
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