Scribe lines are "thicker" than one might first guess. .002-.003 really. "A hair's breadth"
Finding the intersection to within a thou.with a pointed wiggler would be difficult (for my eyes at least). I like to use -/-.002" for location based on scribe lines produced with a transfer block or height gauge. About the same as low power optics, and positioning errors etc. Cal ----- Original Message ----- From: "Chris Radek" <[email protected]> To: "Enhanced Machine Controller (EMC)" <[email protected]> Sent: Wednesday, September 15, 2010 12:32 Subject: Re: [Emc-users] Video Accuracy > On Wed, Sep 15, 2010 at 09:18:04AM -0700, Kirk Wallace wrote: >> I have a project that requires being able to locate a scribed line very >> accurately(, worm gear cutting without a rotary table). One way to do >> this might be to use a microscope with a webcam, then center the line on >> an electronic cross-hair. If anyone has done this, your reply could save >> me from setting up the experiment myself. If this works, then the issue >> is how can I get EMC2 to use the webcam as position feedback. > > I don't understand the task you describe (scribed lines on a worm > gear) but in general you can locate by eye pretty easily by centering > 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 doubt using a webcam will give you better results but it sure is > more complicated. > > ------------------------------------------------------------------------------ > 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 ------------------------------------------------------------------------------ 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
