On Saturday 06 September 2014 07:15:11 John Thornton did opine And Gene did reply: > Gene, > > I've uploaded version 1.6 of Arc Buddy and used it to create a path > from a print. I used the tools > Arc Buddy way so it would insert the > correct things for me. If you put a feed word in it prepends it to the > G code.
That doesn't show in the display although it is exported to gedit with it. Don't enter the leading F, I got two of them when I entered f10. You might change the prompt to say enter feed value. And it would still need to have the XY centerpoint entered after calculating it by hand by moving the centerpoint anchor to a phantom point that results in the start point being exactly where it is according to reading the DRO. For half circle turnarounds in the end of a groove, its fairly easy but it gets "needs a sci calculator" complex when the start and stop angles are not exactly on a 90 or 180 degree quadrant marker. I would find the geometric center of the arc angle entered, then go up that angle by the radius of the entered diameter, and adjust the center X,Y entered to change that point to the point just calculated, using a sin or cos of the angle times the radius, add those to the entered staring XY, then do the rest of the math. That way you can cut an arc for however many degrees you want that starts exactly where its at. For loops to cut to depth, output the present dro data entry as a restore move to cut the next pass deeper, before or after the g2/3 move. You might display this newly calculated "center point" found by this method as a mental error check to the user, but it will never need to be seen as a gcode entry. The only reason to save it would be for use as the reset move when incorporated into a loop to depth. Heck, if is a long slot that winds back up at the same point at the end of the loop, even that line of gcode is deletable gingerbread. Am I making any sense here? > JT > > On 9/6/2014 5:22 AM, Gene Heskett wrote: > > On Friday 05 September 2014 12:25:07 John Thornton did opine > > > > And Gene did reply: > >> Gene, > >> > >> How is Arc Buddy working for you? > >> > >> Do you see any need for any more enchantments? > >> > >> JT > >> > >> On 9/4/2014 1:26 PM, Gene Heskett wrote: > >>> On Thursday 04 September 2014 11:39:57 John Thornton did opine > >>> > >>> And Gene did reply: > >>>> I added it to the wiki. > >>>> > >>>> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Simple_LinuxCNC_G-Code_Ge > >>>> ne rat ors > >>>> > >>>> When you download arcbuddy15.py change the name to arcbuddy.py. > >>>> > >>>> JT > >>>> > >>>> On 9/4/2014 10:16 AM, Gene Heskett wrote: > >>>>> On Thursday 04 September 2014 10:57:49 John Thornton did opine > >>>>> > >>>>> And Gene did reply: > >>>>>> Gene, > >>>>>> > >>>>>> Try Arc Buddy 1.5, I've incorporated the ability to use in Gedit > >>>>>> and instructions on how to do so. > >>>>>> > >>>>>> JT > >>> > >>> And they work! The only stumbling block was that the 'star' near > >>> the help button was actually a missing icon icon. But clicking on > >>> it worked as expected. > >>> > >>> Thank you John. A big improvement in its utility. > >>> > >>> Cheers, Gene Heskett > > > > I used it again last evening John, this time in copy/paste mode as I > > only needed to make one cut, to a frame rail of this psu box I am > > building, because I had walked up to the side of it with a stepped > > bit to make a hole for a fuse holder, and the edge of the last step > > that allowed the fuse holder to pass disclosed that my SWAG choice > > of a mounting point did not clear the 3/4" alu corner rail > > adequately. So I asked it for a .9" diameter half circle for fuse > > holder nut clearance. With the mill homed to x0.0,y0.0 about 1/8" > > from the edge of the rail, it worked perfectly. > > > > So about the only thing I haven't checked is giving it the > > co-ordinates from the on-screen dro as the starting XY. > > > > When doing free hand work that needs to match up, I can see where it > > needs another check box, if at the end of a longer cut, one wants to > > make a turnaround cut, we could use a checkbox that says to offset > > the start point of the cut to be where its at now, doing that as > > opposed to using a preliminary move from where its at to the arc > > start point as it does now. I can visualize it as moving the > > starting XY we give it, to the midpoint of a chord line drawn from > > start to finish & then doing the g2 or g3 math. That would of course > > need some trig functions but I don't have enough python knowledge to > > even guess how that would be done in python. > > > > With that checkbox added, I think it would qualify for the swiss army > > knife designation in code generators. > > > > My $0.02. Thank you. > > > > Cheers, Gene Heskett > > ----------------------------------------------------------------------- > ------- Slashdot TV. > Video for Nerds. Stuff that matters. > http://tv.slashdot.org/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS ------------------------------------------------------------------------------ Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
