Excellent! I think I fixed the build issue, and that rtapi error as well. I
left an error message in there that was no longer valid, so that's been
removed. To fix the build issue, I made a few tweaks to rtapi_math.h to
include fmin and fmax. I don't know if this is the best long term solution
since there's probably a reason it was omitted. However, since I'm using it
anyway, it might as well be there for now.
My next step is to squash all this down onto v2.5_branch so that it can be
merged into future releases. I had some issues building v2.5_branch
('failed to remake Makefile'), but if I can get it built, it shouldn't be
much work to get it running.
-Rob
On Wed, Feb 19, 2014 at 10:41 AM, sam sokolik <[email protected]>wrote:
> I get 2 'aborting after length change!' on tort.ngc. I was wondering
> why it runs almost all paraboc blends until it dawned on me that none of
> the arc-arc, arc-line segments are coplanar.. :) The tool path and
> actual path do line up now. Yay!
>
> sam
> On 2/19/2014 7:07 AM, sam sokolik wrote:
> > I do get the same (I think) fmin error on the reatime build though.
> >
> > make[1]: Leaving directory `/usr/src/linux-headers-2.6.32-122-rtai'
> > /home/samco/linuxcnc-arc-case/src/emc/tp/tc.c: In function
> > ‘tcFindBlendTolerance’:
> > /home/samco/linuxcnc-arc-case/src/emc/tp/tc.c:397: error: implicit
> > declaration of function ‘fmin’
> > make[2]: *** [/home/samco/linuxcnc-arc-case/src/emc/tp/tc.o] Error 1
> > make[1]: *** [_module_/home/samco/linuxcnc-arc-case/src] Error 2
> > make: *** [modules] Error 2
> > make: Leaving directory `/home/samco/linuxcnc-arc-case/src'
> > samco@samco-desktop:~/linuxcnc-arc-case/src$ git pull
> > Already up-to-date.
> > samco@samco-desktop:~/linuxcnc-arc-case/src$ git describe
> > v2.5.3-2703-g0b74121
> > samco@samco-desktop:~/linuxcnc-arc-case/src$
> >
> > sam
> >
> > On 2/18/2014 5:29 PM, Robert Ellenberg wrote:
> >> Good news, I think I've solved the drift issue. The Line-Arc case didn't
> >> correctly handle segments that were "consumed" (i.e. merged into the arc
> >> blend), so it ended up moving twice the distance needed for these very
> >> short segments. Now it properly removes the previous segment like the
> >> Line-Line case. I'll push an update shortly that fixes this issue and
> the
> >> fmin issue. I'm not sure I can fix the little overages quite so easily,
> >> since they are due to imperfect tangency between the blends and circular
> >> segments. I've made a bunch of little tweaks that have improved it
> >> slightly, but there's something in the geometry I'm not accounting for
> >> properly. The good news is, since the violations are coming from the
> >> tangents, then we can fix it by scaling back acceleration if need be.
> >>
> >> -Rob
> >>
> >>
> >> On Tue, Feb 18, 2014 at 2:13 PM, Robert Ellenberg <[email protected]>
> wrote:
> >>
> >>> I got that too, recently. That means I used fmin somewhere outside of
> >>> tp.c. This makes me wish that rtapi_math had fmin and fmax, since I
> use it
> >>> so often anyway.
> >>> On Feb 18, 2014 2:11 PM, "sam sokolik" <[email protected]>
> wrote:
> >>>
> >>>> I just tried to do a realtime build.. I get these errors
> >>>>
> >>>> 1.
> >>>> /home/samco/linuxcnc-arc-case/src/emc/tp/tc.c: In function
> >>>> 'tcFindBlendTolerance':
> >>>> 2.
> >>>> /home/samco/linuxcnc-arc-case/src/emc/tp/tc.c:391: error:
> implicit
> >>>> declaration of function 'fmin'
> >>>> 3.
> >>>> make[2]: *** [/home/samco/linuxcnc-arc-case/src/emc/tp/tc.o]
> Error 1
> >>>> 4.
> >>>> make[1]: *** [_module_/home/samco/linuxcnc-arc-case/src] Error 2
> >>>> 5.
> >>>> make: *** [modules] Error 2
> >>>> 6.
> >>>> make: Leaving directory `/home/samco/linuxcnc-arc-case/src'
> >>>> 7.
> >>>> samco@samco-desktop:~/linuxcnc-arc-case/src$
> >>>>
> >>>> sam
> >>>>
> >>>>
> >>>>
> >>>> On 2/18/2014 10:54 AM, Robert Ellenberg wrote:
> >>>>> Thanks for the additional info! I've been working on correcting the
> >>>>> overages, which seem to come from the blend arc not being perfectly
> >>>> tangent
> >>>>> to the arc segments. As for the "drift" seen in that image, that's a
> >>>> bigger
> >>>>> issue, because it means that we're losing or gaining distance
> somewhere.
> >>>>> I'm 90% sure it's a simple issue with the Line-Arc case, so if that's
> >>>> true,
> >>>>> I should be able to fix it pretty easily. I've been using this
> program
> >>>> as
> >>>>> well, which has a good combination of lines and arcs:
> >>>>>
> >>>>> https://www.dropbox.com/s/cae1gaez3xvi6ia/blur_torus.ngc
> >>>>>
> >>>>
> ------------------------------------------------------------------------------
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