Loading ...
Sorry, an error occurred while loading the content.

Re: 60,000 Make hits! / need help ? thanks Dave

Expand Messages
  • Pat
    Thanks Dave I was just letting things get me down down. Being barely able to walk gets me down as does the lack of someone like Tyler Disney and the no-show of
    Message 1 of 4 , Feb 19, 2013
    • 0 Attachment
      Thanks Dave

      I was just letting things get me down down.

      Being barely able to walk gets me down as does the lack of someone like Tyler Disney and the no-show of the Make article.

      All your points are good and I will try to get started on them. Both a collet and lever operated tailstock were on the MM and I will use the actual photos when I can find them.

      Pat


      --- In multimachine@yahoogroups.com, "David G. LeVine" <dlevine@...> wrote:
      >
      > On 02/17/2013 06:18 PM, Pat wrote:
      > > ...and not a single comment/suggestion (except to add wheels) about how to make the concrete lathe better.
      >
      > I have several, but they have been made before.
      >
      > * Make the spindle so it can take 5C collets and design a collet
      > closer. This will make things more efficient if the lathe ever
      > needs to be used in a production environment.
      > * Move the cross slide screw to a better protected location. Jamming
      > on a single chip can ruin a part.
      > * Make a simple ram type tailstock out of concrete with a
      > cast-in-place liner to be machined out when the headstock has been
      > finished. This is much better for production and is simpler than a
      > screw driven tailstock (which is much more common.) See
      > http://www.cartertools.com/tailalign.html for some images of one. A
      > screw driven tailstock can be built using the lathe once this is done.
      > * Safety matters! Move the carriage controls to either the end of the
      > bed or the apron. Inconvenient controls are MUCH BETTER than
      > controls which maim or kill operators.
      > * Consider either pressure lubrication and/or roller element
      > bearings. A "one-shot" lubrication system is more likely to hit all
      > the lube points than 30 zerk fittings and oil cups.
      > * Consider a non-screw cutting lathe as an OPTION, the drive system is
      > much simpler. A cheap all thread leadscrew and a VSR drill motor
      > makes for a good feed system if well matched.
      > * Consider something like John Dammeyer's ELS instead of threading
      > gears, power feed gears, etc. A set of gears for either metric or
      > imperial threads will cost more than the ELS does.
      > * Consider a much smaller lathe (7"x10-12-15" size) as a "build me
      > first" lathe to make parts for the bigger, concrete machine. It
      > really helps. Assume it will be discarded once one concrete MM is
      > built. It won't be, but it can be other than a long lived, high
      > capital investment tool. It can be used to MORE SAFELY train the
      > operators for the big lathe. Use the same BASIC design so the
      > builders can see how the big lathe goes together.
      >
      > At one point we had discussed using a pair of 300 CID (4.9 Liter) Ford
      > I6 blocks to make a milling machine using automotive jacks to lift and
      > lower the head. Did anything come of that? IIRC, Pat had some 4"
      > tubing he was willing to contribute. The basic plan was 1 block in
      > concrete on the ground, 4" tubes in #1 and #3 or #4, the spindle in #6
      > cylinder. The lifting member in #2 cylinder and the XY table under the
      > spindle. The second block contained the spindle, tube guides and
      > motor/drive system. No quill, just a fixed spindle, similar to the Seig
      > mini-mills but much bigger. Nowhere near as elegant as the Bridgeports
      > (and clones), but plenty to cut a keyway or bore a hole for an
      > agricultural attachment. Power feeds were not (yet) discussed. A good
      > place to consider a quill which is fitted after the machine is complete
      > and can be used to make the parts.
      >
      > Such a "big mill" could significantly ease construction of the "big
      > lathe"...
      >
      > Dave 8{)
      >
      >
      > --
      >
      >
      > /"Among the many misdeeds of British rule in India, history will look
      > upon the Act of depriving a whole nation of arms as the blackest."/
      >
      > Mohandus Ghandi, An Autobiography, Page 446.
      >
    • David G. LeVine
      ... As I said, they were made before. Recapping the memory of prior discussions can be VERY useful. Dave 8{) -- / Among the many misdeeds of British rule in
      Message 2 of 4 , Feb 19, 2013
      • 0 Attachment
        On 02/19/2013 02:58 PM, Pat wrote:
        Thanks Dave
        
        I was just letting things get me down down.
        
        Being barely able to walk gets me down as does the lack of someone like Tyler Disney and the no-show of the Make article. 
        
        All your points are good and I will try to get started on them. Both a collet and lever operated tailstock were on the MM and I will use the actual photos when I can find them.
        
        Pat

        As I said, they were made before.  Recapping the memory of prior discussions can be VERY useful.

        Dave  8{)

        --


        "Among the many misdeeds of British rule in India, history will look upon the Act of depriving a whole nation of arms as the blackest."

        Mohandus Ghandi, An Autobiography, Page 446.
      Your message has been successfully submitted and would be delivered to recipients shortly.