first off good find !!!! second forget abourt the whole deal i will double your money now :) third im thinking 2 hardinge style cnc turrets one close and one at the end
On Mon, May 20, 2013 at 10:13 PM, John Kasunich <jmkasun...@fastmail.fm>wrote: > OK, I admit that this post is partly just a tool gloat, but I > do wonder if anyone has done a lathe with two independent > X axes? > > The gloat: I just bought a Dunham Tool Co, "Optimatic > Lensmaker" for $115 plus tax. It was originally used to > make contact lenses. It has a normal Z axis, but no X. > Instead there was a rotary axis with manual adjustments > for tool tip radius (like a ball turning attachment). > > I took off all the contact lens stuff, and found a gem of > a small lathe hiding underneath: > > Photos: > http://jmkasunich.com/pics/lathe-front.jpg > http://jmkasunich.com/pics/lathe-top.jpg > http://jmkasunich.com/pics/lathe-saddle.jpg > > Features: > 5C spindle taper. > Dunham spindles are supposed to be on par with Hardinge. > Ways are hardened/ground steel bolted to the cast iron. > Saddle has turcite or similar anti-stiction material. > Saddle has tapered gibs. > Sturdy - it is only about 18" long overall, but it weighs 140 lbs > (bed, headstock, and saddle). > > As the last picture shows, the saddle is very long in the > Z direction - about 8.5 inches. But there is only about > 4 inches of Z travel. Doing collet work with no tailstock > means I won't be running very long workpieces. But > normally it would need a lot of Z travel to turn the full > length of a part, and then attack the end with a drill > or boring bar. > > Here is my idea - I put one X axis at the headstock > end of the saddle, with a turning/facing tool on it. > Maybe put a parting tool on the back side. Then > put another X axis at the right end of the saddle, > and equip it with several tool blocks, each set up > to hold a drill chuck, collet chuck, or boring bar. > > Both X axes would be linear rails. There is about > 2.5 inches from the top of the saddle to the > spindle centerline - should be enough. Given the > quality of the rest of the machine I would probably > be using ground and preloaded ballscrews - there > are some good deals on ebay. > > Any thoughts on the dual-X-axis idea? > > -- > John Kasunich > jmkasun...@fastmail.fm > > > ------------------------------------------------------------------------------ > Try New Relic Now & We'll Send You this Cool Shirt > New Relic is the only SaaS-based application performance monitoring service > that delivers powerful full stack analytics. Optimize and monitor your > browser, app, & servers with just a few lines of code. Try New Relic > and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- We conclude that the Second Amendment protects an individual right to keep and bear arms. That right existed prior to the formation of the new government under the Constitution and was premised on the private use of arms for activities such as hunting and self-defense, the latter being understood as resistance to either private lawlessness or the depredations of a tyrannical government." - U.S. Court of Appeals, D.C. Circuit, March 9, 2007 jeremy youngs ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
