Thank you for the replies, sorry for the lack of details (see below). On Wed, 2010-09-15 at 11:32 -0500, Chris Radek wrote: ... snip > the sharp pointer from a wiggler set, bringing it very close to your > scribed line, and centering it over the line with a loupe. You can > get easily within .001 inch.
I was hoping for .0005" at about a 3" radius range. > I doubt using a webcam will give you better results but it sure is > more complicated. The webcam might help automate the process, otherwise I would need to setup each tooth manually. -- Background: I want to make an telescope aiming gear drive, similar to this: http://www.astronomiainumbria.org/advanced_internet_files/meccanica/easyweb.easynet.co.uk/_chrish/worms.htm (Short URL) http://alturl.com/mmnu8 http://www.astronomiainumbria.org/advanced_internet_files/meccanica/easyweb.easynet.co.uk/_chrish/eqnotes.htm#wga (Short URL) http://alturl.com/wwsiy Even though this procedure seems to produce an acceptable product, to me, it seems crude. The cutting points have no relief so the flank sections between the cutting points bind, if there was relief, the cutter would not sync with the gashes, the gashes need a rotary table, etcetera. I'm still trying to formulate a procedure, but basically I am thinking of mounting the gear blank to a rotary axis with angular contact bearings. Then mark the blank and a back plate with matching rough scribe lines for each tooth location. By comparing all of the blank scribe lines with all of the base scribe lines, I can average the errors out to a high degree. Now that I am thing about it, I guess I'll need to ID each mark and have a table that records the relationship of each blank and base mark. The idea is to use a repeated procedure with many data points to come up with a part that is much more accurate that the machine or person making the part. Once I get the axis clamped to an accurate location, I can use linear X, Y and Z to cut a 3D tooth shape from (Synergy CAM) with a miniature ball end mill. It would be a big plus if I could get EMC2 to automate any of this. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
