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The Parallel port isn't dead! (sub topic - Linuxcnc is cool)

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  • #16
    looks like it will fit - now for a few brackets..

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    • #17
      One of my main uses of 3d printing.. It does really work well for trying things out and making sure they will fit.

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      • #18
        Little update.. Made some 3d printed parts to mock up the new ball screw.. Looks good. I think all I have to do is move the ball screw out about .050" or so.

        With the courser ball screw (2.5mm -> 4mm pitch) the input scale went down (50800 -> 31750 pulses per inch ) This and using a pci-e printer port which seems to allow for a slightly faster realtime thread - I can get easy 90ipm.

        The base thread is running 18us or 55.5khz. 55,5555/31750 = 1.75 in/sec (if the quadrature of the encoder is perfect and counts every base period) giving a little headroom - 1.5in/sec or 90ipm.

        Last edited by skunkworks; 09-09-2022, 10:42 AM.

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        • #19
          There are quite a few here that think 3d printers are only useful for very low tolerance parts and toy figurines. I have one but I don't use it nearly as much as I should. I have done prototype parts before machining the final piece too, they are excellent for that.

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          • #20
            Originally posted by Sparky_NY View Post
            There are quite a few here that think 3d printers are only useful for very low tolerance parts and toy figurines. I have one but I don't use it nearly as much as I should. I have done prototype parts before machining the final piece too, they are excellent for that.
            It gets me into 3d modeling.. I have used fusion but lately have been using freecad. I don't know if I am drawing things correctly - but they print ok..

            (I really should try the cam and see how it works)

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            • #21
              3D prints suck for parts that should be metal, you will always have to deal with the modulus of elasticity of plastic. Other than that, they are incredibly useful. Wish I had mine right now. I need to make some medicine bottle adapters for my daughter's feeding tube syringes. They changed to a two start square thread looking thing and connecting the syringes to the liquid medicine bottles would be ideal for a quick, clean, minimal loss of medicine transfer.

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              • #22
                saving another pin from the printer port. Missing tooth functionality to create an index pulse.

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