gene, your great wisdom got befuzzled by linuxcnc radius increase = Zstep * tan(2)
if it is 2 degrees per side you want. (incase you are decreasing the radius every time you feed the Zaxis you must put a minussign somewhere of course. just draw the picture of what the machine must do, and put your variable names in the picture. It will soon get clear. j. PS. I do not see why linuxcnc wants to hang on you piece of code, unless it is as Jon says that the stepper thread is eating all of the cpu time. cheers. On Mon, Mar 5, 2012 at 8:38 AM, gene heskett <[email protected]> wrote: > Hi all; > > I am trying to cut a 4 degree taper, so while I explore how it works in > kcalc, I am getting slightly conflicting answers: > First, its 2 degrees for the radius tilt from vertical, so in degree mode > cos(2)=0.999390827019, but I think I need > > 1.0000000-0.999390827019=0.000609172980904 > > which is subsequently divided by 600, the total z motion divided by the > zincrement of .001" which then gives me the increase in diameter of the G2 > cut I make for every .001" descent of the cutter. > > Or, do I want this: > 1.00000 - 1/x cos(2) = 0.000609544298822 > > Note the diff. Which one, further divided by 600, is the correct taper? > > Or should they be the same, and its actually kcalc that is a little fuzzy? > > Granted, this is probably asking my mill for 20x the accuracy those 20 tpi > acme screws have, but I let it cut a band about 3/32 wide at the top, where > it became obvious that I had forgotten to scale what I did have by that > /600, as the angle looked like somewhere near 45 degrees, not 2. But the > part isn't damaged as all that s/b cut away anyway when and if I get it > right... > > Comments? > > Cheers, Gene > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > My web page: <http://coyoteden.dyndns-free.com:85/gene> > Q: What do you call the money you pay to the government when > you ride into the country on the back of an elephant? > A: A howdah duty. > > > ------------------------------------------------------------------------------ > Try before you buy = See our experts in action! > The most comprehensive online learning library for Microsoft developers > is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, > Metro Style Apps, more. Free future releases when you subscribe now! > http://p.sf.net/sfu/learndevnow-dev2 > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
