Mail Archives: geda-user/2016/04/19/11:27:05
On Tuesday 19 April 2016 09:27:51 gedau AT igor2 DOT repo DOT hu wrote:
> On Tue, 19 Apr 2016, Gene Heskett (gheskett AT shentel DOT net) [via
geda-user AT delorie DOT com] wrote:
> > On Tuesday 19 April 2016 08:30:56 gedau AT igor2 DOT repo DOT hu wrote:
> >> On Tue, 19 Apr 2016, Nicklas Karlsson
> >> (nicklas DOT karlsson17 AT gmail DOT com)
> >
> > [via geda-user AT delorie DOT com] wrote:
> >>>>> 3 thou when made into gcode to mechanically engrave the circuit.
> >>>>> Eiother
> >>>>
> >>>> I'd love to fix gcode bugs, but I don't have any gcode-device. If
> >>>> you'd sign up for testing gcode fixes in pcb-rnd I can look for a
> >>>> free gcode-viewer and add the item on the list.
> >>>>
> >>>> In the meantime I think someone is also working on gcode fixes in
> >>>> the mainline.
> >>>
> >>> Linuxcnc and machinekit which are essentially the same software
> >>> use g-code, it is possible to run in simulation to test g-code. I
> >>> have spent the last months on linuxcnc including drawing some
> >>> circuit boards with pcb and have just started to look at g-code.
> >>
> >> Added item gcode. May there be enough testers signed up, I can fix
> >> the code (and this one is an easy target for mainline developers to
> >> merge).
> >
> > Please try to resist the temptation to use octagon's when a circle
> > is needed as eagle does. Likely because having that data simplifies
> > the
>
> Thanks for the tip. My memory is not very good either, so it's likely
> that by the time I have enough testers signed up to get me even
> consider checking the code, I'd forget ideas I hear now.
>
Chuckle, both of us I fear.
> In case gcode wins, I will surely ask my testers what they miss or
> want differently. If you want to ensure your considerations to
> survive, you'll need to be one of the testers.
Unless I redesign my charge pump detector for a fast switching output,
which it does not now have, and I was forced to build some hardware to
get around that, which FWIW, is working fine, I do not have another
project simmering on the "back burner". However, that could change in
the next week, so I'll "stay tuned." The board would of course need to
grow room for something to use as a Schmidt trigger in that event, or
better yet a small relay to make a hard contact. One of them is
triggering a 40 amp SSR, and the diagnosis is that the slow on off times
of an RC circuit, were not triggering both directions of the SSR
simultaneously, so I was tripping a 25 amp breaker with the inrush of a
6 amp load. So now a 50 ohm 200 watt R in series with the transformer
primaries for the first 5 seconds allows the filters to be pre-charged
well enough that a 20 amp breaker stays up when its turned on. A
software timed soft start for the spindle power supply. Too many
microfarads in its bridge and capacitor filtering didn't help the
excessive inrush either. Hindsight is always 20-05 I've been told. :)
OTOH, one of the things I am controling with a charge pump detector is a
vacuum cleaner to suck up the cutting debris when the spindle is
running, if I so wish. FWIW, I write 95% of the gcode I run. Next is
probably going to be a tool changer so I can automate the use of at
least 3 or 4 tools during a given job. I saw something I can probably
make for that in a hossmachine video on u-tube. But it will need to be
done on a swing mount that can be brought in above whatever might be
projecting past it up to 5 or 6" above the table.
One job is carving the pockets in a 44" strip of Mahogany for 3 of the
Rockler Lid-Stay hinges, uses 3 tools with 4 tool changes I have to do
by hand. Its up to me to re-position the stick for each hinge too. I
suppose I could cut a passage window for the workpiece but I'd druther
it just swung out of the way as long as it doesn't interfere with
homeing the machine at any time. More "study" required obviously. And
possibly the acquisition of more alu stock. 1/2" or so 7078T6, machines
almost like cast iron but harder on the tools unless running in an oil
bath to seal the oxygen out of the cut.
> Regards,
>
Thanks Igor2.
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>
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