you are correct when you understand turning as super fine threads and you are correct when you understand the fillet in the corner of the shoulder will not be a perfect fillet as the accel/decel will cause the tool to round the motion slightly and not form the tool nose radius in the corner of the shoulder a dwell would do it - exact stop would do it - slow the feed rate down very slow will come close
On Mon, Jul 6, 2009 at 11:13 PM, Frank Tkalcevic<fr...@franksworkshop.com.au> wrote: > Thanks for the reply. It was just a general question. I've got stuck in my > mind, the image of the lathe turning as "turning a super fine thread", and > was wondering if it stopped when it got to the shoulder and retracted, would > it leave that part of the "thread" that it didn't get around to machining. > Would a standard gcode program for turning dwell to cut a complete > revolution? > >> -----Original Message----- >> From: Stuart Stevenson [mailto:stus...@gmail.com] >> Sent: Tuesday, 7 July 2009 11:40 AM >> To: Enhanced Machine Controller (EMC) >> Subject: Re: [Emc-users] Slightly OT: Turning >> >> Frank, >> I G04 dwell would do the same thing as what you do >> manually. How critical is the squareness of the shoulder at >> the diameter of the turned shaft? Do you need a very accurate >> corner radius? If you need a VERY accurate corner radius you >> should use a smaller corner radius on the turning tool and >> interpolate the corner radius on the shaft. >> thanks >> Stuart >> >> On Mon, Jul 6, 2009 at 6:42 PM, Frank >> Tkalcevic<fr...@franksworkshop.com.au> wrote: >> > I'm writing some gcode programs for my lathe and I have a couple of >> > questions. >> > >> > I'm doing a basic shoulder, turning along the length of the >> work piece >> > in the -Z direction to a point, then moving in the +X direction to >> > make the square shoulder. >> > >> > 1) Should I be using one of the exact modes, G61 or G61.1? >> What's the >> > difference between Exact Path and Exact Stop mode? >> > 2) When the tool reaches the corner, should I dwell to >> allow the work >> > piece to spin so I can cut at this position around the entire >> > circumference. I assume I do this as a side effect when manually >> > turning because I am so slow. >> > >> > Thanks, >> > Frank >> > >> > >> > >> ---------------------------------------------------------------------- >> > -------- Enter the BlackBerry Developer Challenge This is >> your chance >> > to win up to $100,000 in prizes! For a limited time, vendors >> > submitting new applications to BlackBerry App World(TM) >> will have the >> > opportunity to enter the BlackBerry Developer Challenge. See full >> > prize details at: http://p.sf.net/sfu/blackberry >> > _______________________________________________ >> > Emc-users mailing list >> > Emc-users@lists.sourceforge.net >> > https://lists.sourceforge.net/lists/listinfo/emc-users >> > >> > >> >> >> >> -- >> you can lead a person to knowledge >> but you cannot make him think >> >> -------------------------------------------------------------- >> ---------------- >> Enter the BlackBerry Developer Challenge This is your chance >> to win up to $100,000 in prizes! For a limited time, vendors >> submitting new applications to BlackBerry App World(TM) will >> have the opportunity to enter the BlackBerry Developer >> Challenge. See full prize details at: >> http://p.sf.net/sfu/blackberry >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > > > ------------------------------------------------------------------------------ > Enter the BlackBerry Developer Challenge > This is your chance to win up to $100,000 in prizes! For a limited time, > vendors submitting new applications to BlackBerry App World(TM) will have > the opportunity to enter the BlackBerry Developer Challenge. See full prize > details at: http://p.sf.net/sfu/blackberry > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > -- you can lead a person to knowledge but you cannot make him think ------------------------------------------------------------------------------ Enter the BlackBerry Developer Challenge This is your chance to win up to $100,000 in prizes! For a limited time, vendors submitting new applications to BlackBerry App World(TM) will have the opportunity to enter the BlackBerry Developer Challenge. See full prize details at: http://p.sf.net/sfu/blackberry _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
