Gene, I'm not following you...
JT On 9/6/2014 9:46 AM, Gene Heskett wrote: > 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 >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users > > Cheers, Gene Heskett ------------------------------------------------------------------------------ Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
