THANK YOU and great work
On Mon, Apr 15, 2013 at 2:31 AM, Rudy du Preez <r...@asmsa.co.za> wrote: > Thanks for all the interest. > > I used Mastercam at a friend of mine. The impeller CAD model was fetched > somewhere from the Internet. I wrote my own post processor in Delphi - it > reads the NCI file that Mastercam creates. This file has the tip and tail > 3D > coordinates of the tool in the toolpath in world or part coordinates. From > this it was easy to determine the A and C angles for the 4th and 5th axis > in > part coordinates. The XYZAXkins that I wrote expects part coordinates. For > the impeller the part coordinates' origin is in the center of the blank on > the top surface. The post-processor also displays the toolpath and tool > vector in 3D, but with the tool fixed in space and the part moving > (opposite > to what AXIS shows). > > The setup is just a test - two rotary tables fitted with stepper motors. > The > bigger rotary table (red) is fitted on the machine's table with its axis > parallel to the machine's X-axis (provides the A-axis). The smaller rotary > table is fitted on an angle plate which is fitted to the bigger rotary > table > so the its axis is vertical parallel to the spindle axis or z-axis when in > the A = zero position. It provides the C-axis. > > The machine is a Hermle 780. Its spindle is fixed and the table moves > up-down, left-right, and forward-backward. In the movies it may look as if > the spindle is moving up-down - this is not the case, the camera was > mounted > on the table. > > Backlash was adjusted as best I could - the rotary tables are not the best > quality. I was not concerned about the accuracy, just the functional > testing > of the kinematics component. I was only cutting a soft material at > relatively slow speed. The movies were speeded up 200% to shorten their > playing times. > > The component actually used 6 axes. The 6th axis is used to do indexing > between the blades of the impeller. The Gcode is provided for preparing the > blank (1st movie) and then to remove the material between the blades at one > indexing station only (2nd movie). The 6th axis adds a rotational increment > for each blade so the Gcode is used over and over again with a relative > indexing C-axis move between blades.. > > I have designed a complete trunnion table to replace my test setup. This > has > a 140mm C-axis rotary table built in to a yoke including a concealed > stepper > motor. The yoke is supported at both ends in bearings and is turned at one > end by a larger stepper motor. The trunnion table will be built as soon as > I > have completed the conversion of my latest machine, A Hermle PF1000. > > If I knew how and where I could post some pictures of the machine used here > and the new trunnion table. > > Hope this background answers most of the questions. > Rudy > > > > ------------------------------------------------------------------------------ > Precog is a next-generation analytics platform capable of advanced > analytics on semi-structured data. The platform includes APIs for building > apps and a phenomenal toolset for data science. Developers can use > our toolset for easy data analysis & visualization. Get a free account! > http://www2.precog.com/precogplatform/slashdotnewsletter > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- jeremy youngs ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
