On Sun, 2009-04-26 at 11:33 -0500, Jon Elson wrote: > Kirk Wallace wrote: > > This is what I got with 2.3.0 and the previous threading sample with > > 4=0.08333 at 400 RPM: > > > > http://www.wallacecompany.com/machine_shop/HNC/HALscope_2.3_threading.png > > > > Previous (2.2.8): > > > > http://www.wallacecompany.com/machine_shop/HNC/4at083333-2.png > > > > 2.3.0 seems to be much better, but the HALscope is still interesting. It > > seems to get more unstable as the cut progresses? > > > > > Well, the spindle is loaded down with the cutting effort, and may have > some vibration due to that. > The Z axis may be trying to follow those small fluctuations. Before, I > think there was a LOT of low-pass filtering on the spindle velocity, > which may have been part of the problem. > > > Jon
If it makes any difference, I was cutting air, but I can imagine that there are other hardware load sources. I should do more testing on cutting real threads, but my guess is that what I have is good enough, and with some effort could get better. I certainly can use much less lead in, with higher RPM. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensign option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
