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Adding I-gaging DROs to x and y axis of HF round column mill/drill

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  • Adding I-gaging DROs to x and y axis of HF round column mill/drill

    I am trying to finish up some of the parts for an air/steam motor that I started on a couple years ago, and I decided that the I-gaging DROs I bought last year would help, since the dials are 0.1667" per revolution and it's hard to compute the reading for a given dimension. I thought it might be fairly simple, but it is turning out more complex than I figured. I searched on this forum but did not find very much, except the "I love my round column mill" thread. But a general search produced the following:

    http://www.hobby-machinist.com/threa...l-drill.20596/

    It is a very similar machine, but not identical. I think it will not be too hard to mount the x-axis on the front of the milling table. It might be better on the back but I'd have to remove the table to drill the holes and perhaps make other modifications. The y-axis might be even more challenging, but I should be able to do it as shown in the thread above. Actually, my mill is not even bolted to the bench, so that is something else I should do.

    I'll take some pictures of my machine and the DROs a little later. Our warm spell has now ended with an arctic blast and the shop is not heated, so my machining time is limited. I might clean up my kerosene heater and install one or two infrared heater lamps to keep my hands warm, at least, but I'm juggling how much time it will take to make it comfortable with the time I have to finish the parts for my motor in time for Cabin Fever next Saturday.

    Does anyone else have experience with this? Thanks!
    http://pauleschoen.com/pix/PM08_P76_P54.png

    Paul: www.peschoen.com
    P S Technology, Inc. www.pstech-inc.com
    and Muttley www.muttleydog.com

  • #2
    Not I-gaging, and a knee mill instead of a round column...

    The X axis on mine was done similar to the link you provided. The Z on the spindle was also similar. A separate method is needed to measure the movement of the head (or knee in my case) sometimes. As long as the spindle + tool is within range of your registration surface you don't need to know the distance from the table to the head.


    Dan
    At the end of the project, there is a profound difference between spare parts and extra parts.

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    • #3
      I decided to brave the environment of my cryogenic workshop, and took a few pictures. This is the front of the table from underneath. Out of focus, but shows where the DRO will go:



      And here is the DRO placed approximately where it will go:


      Under the table, left side, where the y-axis DRO will go:


      And with the DRO positioned there:


      Looks like it shouldn't be too difficult, but I'll wait until after I've finished a few other things.
      http://pauleschoen.com/pix/PM08_P76_P54.png

      Paul: www.peschoen.com
      P S Technology, Inc. www.pstech-inc.com
      and Muttley www.muttleydog.com

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      • #4
        i have lots of pictures on my face book page

        here.

        this should get you there. . .

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        • #5
          Check out the installation examples on the following link.

          It will give you a lot of ideas. It was useful when I installed my DRO on my RF31 round post, then transplanted it to my Bridgeport.

          http://www.dropros.com/Digital_Reado...stallation.htm

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          • #6
            I added a set of DRO's to this mini I picked up at an Estate sale. You can see the clearance notches I cut to maximize travel. They seem to work pretty well for cheap ones. Mike

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