More obviously, run the motor at its rated speed, change one of the pulleys to give you your desired spindle speed.
On Thu, 24 Mar 2022 at 17:33, heritagespringerguy--- via Emc-users < emc-users@lists.sourceforge.net> wrote: > A VFD w/ anti-snoring features. > > Love it! > > > On Mar 24, 2022, at 12:16 PM, John Figie <zephyr9...@gmail.com> wrote: > > > > Now I am ready to figure out what to do for the spindle drive. > > > > The project is a 1972 Clausig NC lathe. The original paper tape fed > > controls are long gone. I actually have the owners manual. The original > > lathe had a 5 HP motor and a variable speed transmission similar to > > bridgeport heads and many machines of that era. But that variable speed > > drive is no longer with the lathe. The next owner fitted a large PMDC > motor > > to the machine - which I still have. IT is a beast of a motor with > > tachometer feedback. The nameplate has a continuous stall torque of 300 > > (in-lbs?), a peak amps rating of 320 amps, 4000 RPM and 217 VDC. > > > https://drive.google.com/file/d/1O1217d-umZHpIvBtVZ4XCjMkOsplnwgu/view?usp=sharing > > Information in the manual indicates that original max spindle speed was > > likely 2000 RPM. THe spindle is geared by a timing belt that has a motor > > pulley of 30 and a spindle pulley of 47. The next owner of the machine - > > who I purchased the lathe from removed the DC motor and installed a 1750 > > RPM 5 HP 220V 3phase Baldor motor. The 5 HP baldor is currently mounted > on > > the machine. > > > https://drive.google.com/file/d/1aBlcbBWQ48A-brels9UIhQqBcvd0fiXx/view?usp=sharing > > > > Now what to do about the drive for the spindle? > > > > 1) Keep the 5HP motor and use a VFD to run the motor faster to get my > 2000 > > spindle speed? 2000 * 47/30 = 3133 RPM. I don't have much experience with > > induction motor drives. Is is feasible to run my motor at nearly double > it > > rated speed? Are these cheap single phase input VFDs any good? > > ebay link > > < > https://www.ebay.com/itm/224441224652?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D237808%26meid%3Dff3eea0653834c509c5a592b1ba40972%26pid%3D101195%26rk%3D2%26rkt%3D12%26sd%3D183100064244%26itm%3D224441224652%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplAMLv9PairwiseWebMskuAspectsV202110NoVariantSeed&_trksid=p2047675.c101195.m1851&amdata=cksum%3A224441224652ff3eea0653834c509c5a592b1ba40972%7Cenc%3AAQAGAAACEOgL6rSsLbmX3BNmrTUtzjXFnK5T7FXeEWyt%252FMTCcEhYXj1eFLAyDkUF3cgxnfgzv4cbJBL17cObzrqgUBjPnSWoDV9H%252F97l1QpjsMVxHCPzucB%252FPP6ChEn65wOcJuX02OVJD1Unud%252Bu2hc2MXKi6f0Et6zxgDKdbWzIhGOiBvW50273%252FBxppgrKhznYp0UkdXIRUy29%252BbZHSIeWuW2%252Bt2I3J7EH0XSN759g%252FbRt%252FnkNo6gh5mrdMRTEfVmg8R7sG9BK7tqq2GvgeHESJB6MdVyo%252FXjdgKULT%252BhCCrID%252Bi1nAuMebMMPvcqjiP8ZBznpyFhQQ%252BdJIb%252BrSulGJT4Fr61R9furhXY91Rn0wjVaRYePwjkz42rvK7%252BZj4VzZ%252B84cXxI1MVp7yIZEMhDUePaBYQtuuAzY6Bjkvrda%252B0Klnzv7EbxROkMBtZLkytuVi1DWS7UnVKZXmtrVRDPbuWkutRYsgVU86VoOBPZjxFxeiSeNbfqhmOkPUynaoRrBtiHtYcFDu4hXI5WOobACfyF%252F%252BJCOegnmLRb1MPehF0FD%252FyY8vGKJBvCk%252B2Vwxsm%252B6BG%252F8ac00UG1xRU6jJ2KgbGncP67f52W%252FpELM%252BjXwAK6reZZc0U087Yfiigoa3UdOvlftco2KjzVUY4gHq%252B7rmfkOb%252FKqoDC0QrFWEC4GBjd6YsOFO114iU%252BTV%252B9nIh0e9bfw%253D%253D%7Campid%3APL_CLK%7Cclp%3A2047675&epid=1772324768 > > > > > > More Pics > > < > https://drive.google.com/drive/folders/1U7o7AuiLQUyLCCwfV4zCoCtOD15QpmeE?usp=sharing > > > > > > So far I have made my own torque mode DC drives for the x and z and that > > seems to be working OK. I am using mesa 7i80 for I/O. Next I need to > start > > putting all the pieces together. > > > > The mechanics of the machine seem to be in excellent condition. Probably > > because the machine has had little use even though it is old. > > > > John Figie > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
