Try a conventional cut for the finish pass on steel and see if you don't like the finish better. Sent via BlackBerry from T-Mobile
-----Original Message----- From: Jon Elson <el...@pico-systems.com> Date: Sat, 05 Sep 2009 13:41:39 To: Enhanced Machine Controller (EMC)<emc-users@lists.sourceforge.net> Subject: Re: [Emc-users] What hardware should buy to start Gene Heskett wrote: > You can't do anything about the surface of the raw material, but when > machining, the surface should be well flooded by some relatively oxygen free > fluid which will cover the cutting edge, and the freshly cut surface as > quickly as possible. 2 schools of thought here, compete for how you do it. > > Either assumes the cut will be as deep as the spindle has power to do as that > removes the unwanted material with fewer miles on the cutting edge. > One other thing is the direction of cut. If the material is fed against the direction of the cutting edge, noramlly called "conventional milling", the cutter enters the material by scraping along the just-cut material until pressure builds enough for it to punch through. This scraping increases wear. The opposite is when the material is fed WITH the cutting edge, there the cutting tooth punches hard into the uncut material, and takes a slice that slowly decreases in thickness. This is called "climb milling". This mode produces a lot less wear on the cutter, but it requires a "tight" machine, as this direction of feed has the cutter pulling the work, and machine table, toward it! If you have a lot of backlash in worn Acme leadscrews, this direction can cause the work to jump into the cutter, wrecking parts and breaking cutters. But, on a machine with tight screws, especially ballscrews, the results, in terms of surface finish and cutter life will be quite significant. Jon ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
