Hobbing on horizontal mill

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Hobbing on horizontal mill

Home Forums General Questions Hobbing on horizontal mill

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  • #622341
    John A McClain
    Participant
      @johnamcclain50461

      There is a old post on here by John Stevenson where he put some electric motors and sensors on a manual horizontal mill

      Can anyone tell me how to duplicate this

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      #28935
      John A McClain
      Participant
        @johnamcclain50461
        #622358
        jann west
        Participant
          @jannwest71382

          I can't recall the post, but I imagine it would be with a few steppers and a rotary table assembly.

          Something like this for small gears, with a tailstock, to hold the blank, driven by a stepper and an ardiuino to move to the next tooth:

          https://www.shars.com/5c-spin-index-fixture

          (true craftspeople might also include a lock for each indexing activity, to secure the milling activity – perhaps pneumatic?)

          And something else to traverse the table? perhaps another (stepper or conventional) motor with two limit switches?

          Probably also some coolant.

          Doesn't seem like rocket surgery.

          Edited By jann west on 23/11/2022 17:48:13

          Edited By jann west on 23/11/2022 17:50:41

          #622360
          Dave S
          Participant
            @daves59043

            IIRC, and its been a few years….

            The spindle had a pulse generator on it, which was fed into a box of electronics.

            That electronics did pulse dividing, which generated the step signal to drive a stepper motor which was attached to the input shaft of a sodding big dividing head.

            It was a Victoria universal horizontal – so the table could be swivelled to match the hob angle I think.

            There are pictures somewhere, either here or over on the homeshop machinist bbs

            Dave

            #622364
            Bazyle
            Participant
              @bazyle

              This comes up every now and again on here and on the HSM forum but can be buried in threads with obscure titles. There isn't a simple plug and play system nor even a simple Arduino/pi/other system for sale like the electronic leadscrew options. John initially had a pure TTL logic chip solution but later converted to a computer based system somebody developed for him, which as far as I know has not been made commercially available.
              However a couple of people on here I think have got it sorted, but they are advanced electronics tinkerers.

              #622366
              JasonB
              Moderator
                @jasonb

                Dividing head

                 

                Box of tricks

                Head angled for helical gears

                Edited By JasonB on 23/11/2022 18:43:45

                #622368
                DC31k
                Participant
                  @dc31k
                  #622376
                  John P
                  Participant
                    @johnp77052

                    Posted by Bazyle 23/11/2022 18:41:45

                    This comes up every now and again on here and on the HSM forum but can be buried in
                    threads with obscure titles.

                    There isn't a simple plug and play system nor even a simple
                    Arduino/pi/other system for sale like the electronic leadscrew options.

                    John initially
                    had a pure TTL logic chip solution but later converted to a computer based system
                    somebody developed for him, which as far as I know has not been made
                    commercially available.
                    However a couple of people on here I think have got it sorted, but they
                    are advanced electronics tinkerers.

                    —————————————————————————-

                    This part is not true

                    "There isn't a simple plug and play system nor even a simple
                    Arduino/pi/other system for sale like the electronic leadscrew options"

                    Richard Bartlett designed and made the "Compucut Syncron" system
                    which i have ,it did not have the shortcomings of the published
                    circuit that was in MEW 108 but is a system that actually works
                    properly.
                    As far as i know the system is still available ,when i spoke to
                    Richard a few years ago he still had about 10 or 12 pcb
                    boards.
                    You still have to make up the head and work holding spindle to
                    suit the machine application ,was in Mew 193 also some
                    photo's in album gears.

                    John

                    #622390
                    ChrisLH
                    Participant
                      @chrislh

                      I copied John P's set up using my own design of dividing head and a smaller, vertical milling machine. It works very well. Photo in my Album. I know nothing about the electronics unit bought from Richard Bartlett some years ago except how to make use of it. Thank yoy John.

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