On Fri, 2007-10-19 at 15:41 -0500, Brian Michalk wrote: > Is there an old trick to turning a part exactly on center? > If this venue is not the right place, I would appreciate a pointer to an > active group that could help me.
Here are two other machining sites I know of: http://www.practicalmachinist.com/ http://www.cnczone.com/ > I have 12mm precision round shafting. I need to turn down one end of it > to .25 inches diameter. > I have a four jaw chuck, and center to within .001", but when I hard > couple a stepper motor to this part, it binds due to the .25" boss not > being exactly on center. The first thing that comes to mind is... can you start with a larger shaft and create all of your critical features in the first setup? > I do have a spider coupling, but would rather go direct due to the added > size of the coupling. What about flex mounting the stepper motor with a rigid top link going lets say right and a bottom link going left? I would think that the motor bearings would need to be fairly stout and you may need to mount to the center of the motor, but its a thought. * ------- ===III===| Stepr | ------- * Side View ^ Back View \/ *=====* Link ---- | | ---- *=====* Link or maybe three equally spaced links and no flex mount. > Is there some "trick" someone could enlighten me with? -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC lathe Bridgeport mill conversion pending Zubal lathe conversion pending) ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
