-
> > "There are four boxes to be used in defense of liberty:
> > soap, ballot, jury, and ammo. Please use in that order."
> > -Ed Howdershelt (Author, 1940)
> > If we desire respect for the law, we must first make the law respectable.
> > - Louis D. Brandeis
> > Genes Web page <ht
those powered mains disconnect switches,
> the likes of what you find in office photocopiers and industrial cnc
> machines.
>
> Any ideas?
>
>
>
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> http
>> ___
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> > >>> Emc-users@lists.sourceforge.net
> > >>> https://lists.sourceforge.net/lists/listinfo/emc-users
> > >>
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> > >> Emc-users@lists.sourceforge.net
> > >> https://lists.sourceforge.net/lists/listinfo/emc-users
> > >>
> > >>
> > >>
> > >> ___
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> > >> Emc-users@lists.sourceforge.net
> > >> https://lists.sourceforge.net/lists/listinfo/emc-users
> > >
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> > > Emc-users@lists.sourceforge.net
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> > >
> > >
> > >
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>
>
> 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, 1940)
> If we desire respect for the law, we must first make the law respectable.
> - Louis D. Brandeis
> Genes Web page <http://geneslinuxbox.net:6309/gene>
>
>
>
>
>
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rew? Last I looked, Path Workbench only
did 2.5D milling. It would be great if it would do this. I assume you
have to use a 4-axis machine to mill a leadscrew or a CNC Lathe.It it
has been upgraded, I'll download it again and test it ou
>
> --
Chris
in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author, 1940)
> If we desire respect for the law, we must first make the law respectable.
> - Louis D. Brandeis
> Genes Web page <http://geneslinuxbox.net:6309/gene>
> How do you wire the gpio on the rpi4 to the 7i90HD? any links for cables
> etc?
>
> Thanks, Martin
>
> ____
>
>
> On Thursday, February 10, 2022 3:05:57 PM EST Chris Albertson wrote:
> > Yes, "Mini ITX" is just a shape and
ion on a new
PC class computer.It's just as well because now there are very good
low-cost microcontrollers.
On Fri, Feb 11, 2022 at 3:40 AM gene heskett wrote:
> On Thursday, February 10, 2022 3:05:57 PM EST Chris Albertson wrote:
> > Yes, "Mini ITX" is just a shape and
ment and is
> designed for the especial use of mechanical geniuses, daredevils and
> lunatics."
> — George Fitch, Atlanta Constitution Newspaper, 1912
>
>
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hris
>
> specifically i am thinking of running my cnc machines on them. they are
> cheap fanless and seem to be pretty solid.
>
> but just seeing who else has gone down that way
>
> On Wed, Feb 9, 2022 at 5:58 PM Chris Albertson
> wrote:
>
> > They work well for thei
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download/9259/
> > > Notice the curve at 3000 half steps per second is about 3.2NM. That's
> > > 12,000 steps per second (7.5RPS) with 8 micro-steps per step well
> within
> > > the reach of even a parallel port controller and 450 oz-in. That's
> well
> >
u'd be
better off with any of those cheap Intel boards that have two Ethernet
ports. Or I'm sure you can find an older PC in someone's junk pile
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Emc-u
lleys, the
> steppers, power supply, stepper drivers, ..., it's too late to be really
> cost effective.). And the surface grinder only cost me $300.
>
> Thanks,
> Ken
>
>
>
> Kenneth Lerman
> 55 Main Street
> Newtown, CT 06470
>
> ___
:08:01 PM EST Chris Albertson wrote:
> > I followed that link.Wow, that is a good deal. Especially when you
> > look at the power supply. It uses a 12 volt barrel jack and a large
> > size wall-wort. The CPU burns all of 6 Watts.It could run on
> > battery power.
>
they only hold scratch files
On Wed, Feb 2, 2022 at 8:25 PM Chris Albertson
wrote:
> They use a really tiny ATX power supply that convert the 12 volt input to
> whatever the ATX pins are. These things cost about $20 The power supply
> is some small it is built into the cable
> h
ini-box-Mini-itx/dp/B00QVK3ZPU/ref=sr_1_6?crid=1AAP9OO84LECA&keywords=mini+atx+pico+power+supply&qid=1643862229&s=electronics&sprefix=mini+atx+pico+power+supply%2Celectronics%2C124&sr=1-6>
On Wed, Feb 2, 2022 at 7:32 PM Andy Howell wrote:
> I
>
> On 2/2/22 20:08, Ch
TX boards have the cpu soldered in. I
> don't imagine I'd need a lot of memory. 2GB maybe?
>
> Looks like this will do the trick. $200 with 2GB of memory.
>
> https://www.onlogic.com/pd14ri/
>
> Thanks,
>
> Andy
>
>
>
>
>
>
>
gt;
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> and can recommend candidate boards from experience. Thanks in advance.
>
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y has half a dozen USB ports. Even a Raspberry Pi has 4 USB ports
and might work well for this.
But my question is not about using a specific PC, but rather if it matters.
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ering. But the "N identical" method is
easy to do and works well.
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This
On Sun, Jan 23, 2022 at 4:30 PM andy pugh wrote:
> On Sat, 22 Jan 2022 at 04:49, Chris Albertson
> wrote:
> >
> > Arduino? Too slow to coune pulses if they happen every 0.0001 inch
> unless
> > the table moves slow.
>
> As long as it gets a couple of sam
ave a 3D printer.
> This is go'n to to be fun :)
>
>
>
>
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of mechanical geniuses, daredevils and
> lunatics."
> — George Fitch, Atlanta Constitution Newspaper, 1912
>
>
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ire respect for the law, we must first make the law respectable.
> - Louis D. Brandeis
> Genes Web page <http://geneslinuxbox.net:6309/gene>
>
>
>
>
>
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309/gene>
>
>
>
>
>
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e of mechanical geniuses, daredevils and
> lunatics."
> — George Fitch, Atlanta Constitution Newspaper, 1912
>
>
> ___
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> https:
able.
> - Louis D. Brandeis
> Genes Web page <http://geneslinuxbox.net:6309/gene>
>
>
>
>
>
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Redond
d require some
> design hardening.
>
> The bldc hal component is great for experimenting with driving brushless
> motors, though, if you don't need phase current feedback in your control
> scheme.
>
> -- Ralph
>
> From: Chris Al
motors.
>
> The sintheta and costheta values could be multiplied by the output
> of a PID loop to adjust the amplitude based on torque or velocity
> requirements. Bldc connects to an encoder counter to track rotor angle.
>
> -- Ralph
>
>
losed-loop
steppers"If this can already be done in software how?
But I have serious doubts a Linuc PC has good enough timing even with an RT
kernel. But in theory, how to connect the stepper?
On Wed, Jan 12, 2022 at 1:26 AM andy pugh wrote:
> On Wed, 12 Jan 2022 at 01:28, Chris Alber
xt. 2031
>
> -Original Message-
> From: Chris Albertson
> Sent: Tuesday, January 11, 2022 2:06 PM
> To: Enhanced Machine Controller (EMC)
> Subject: [Emc-users] Field Oriented Control (FOC) algorithm for BLDC and
> Stepper motors.
>
> [EXTERNAL EMAIL] Be sure lin
he control software is
measuring current and forcing it to have the desired waveform against the
inductance and mechanical loads.
https://youtu.be/zcb86TRxTxc
Here is the project website https://simplefoc.com/
--
Chris Albertson
Redondo Beach,
>
> >
> > Does the space mouse work under linux?
>
Let's say it does work under Linux. Do any Linux-based CAD systems work
with the Space Mouse?
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9CMGN25Q/ref=sspa_dk_hqp_detail_aax_0?psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFCNE83T01ZSDNYNUomZW5jcnlwdGVkSWQ9QTA2MzQ1NDQzOUNJWjVFUlE1SUw0JmVuY3J5cHRlZEFkSWQ9QTAwODUxMzJDR1VVOVI3RjhMVkYmd2lkZ2V0TmFtZT1zcF9ocXBfc2hhcmVkJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==>
Chris Albertson
Redondo Beach, California
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ust a casual user.
> And a lefty.
> Do y'all have any recommendations?
>
>
>
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at this guy and his robot arm etc. Nice to see someone else
> makes almost as many mistakes as I do.
> https://www.youtube.com/watch?v=T3fl1FIKEQo
>
>
> > -Original Message-
> > From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> > Sent: January-05-2
t; On 1/3/22 6:58 PM, Sam Sokolik wrote:
> > This has been done at a bigger scale... (2 feedback loops)
> >
> >
> https://web.archive.org/web/20160222165548/http://jmkasunich.com/cgi-bin/blosxom/shoptask/wichita-trip-02-20-08.html
> >
> >
> http://wiki.li
nning a 2.7 linuxcnc version I guess you
> could say they have their own branch/fork
>
> I would have thought that since the change to python 3 with linuxcnc that
> will be quite a divergent change to linuxcnc that will make it difficult to
> integrate any items pushed back to 2.7
>
trying to support
> buyers of his kits though. There are an awful lot of bits
> and pieces and assembly steps.
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-
own%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=5vevh1cJOszulDkv2LJY%2B6hhQijKW0z8ko4CcONelAs%3D&reserved=0
>
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or a conveyor belt maybe it's not an issue?
> John
>
>
>
> > -Original Message-
> > From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> > Sent: January-03-22 6:40 PM
> > To: Enhanced Machine Controller (EMC)
> > Subject: [Emc-users] Very good so
ee if it could be applied?I will use parts
of his idea on my dog-bot.
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t; broaching/indexing to create the two ring gears the real issue is the outer
> bearing of the 101T output ring gear. But overall not that difficult to
> create once you have the 0.5 module shaper style cutter.
>
> John
>
>
> __
about doubles what each group can do. And Tormach
seems to be investing real money in this.
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; Currently LinuxCNC is being added to debian testing. It will soon be part
> of the debian repository.
>
> On Fri, Dec 24, 2021, 12:54 PM Chris Albertson
> wrote:
>
> > The problem that is limiting LCNC's wider use is that it is a very old
> > design. It is def
re. I
> plan to start building docs using vismach, then move to tabletop/lab setups
> with small real components, etc...
>
> All these reference docs could have a category and a dedicated thread in
> the forum to hold discussions, requests and criticisms.
>
> TY
> Jérémie
>
> __
lathe. Same for
screw holes and such, I ream them to corect size r install threaded brass
inserts.
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CAD is great for making parts that can be algorithmically
defined. But I'd
hate to have to make an organic shape like a automotive body or a power
tool.
o it's good to be able to move designs between tools. STEP is the best
for that.
Chris Albertson
Redondo Beach, California
_
t; Has anyone considered that route? Obviously it requires a rotary axis to
> make a rotary axis, but it really doesn’t seem any more insurmountable and
> the results would probably be much more precise.
>
> Matt
>
> > On Dec 20, 2021, at 4:56 PM, Chris Albertson
> wrot
have to flex nearly as much as it does
> with the 1.25module cup. Perhaps if the 1.25module cup also had 140T and
> the larger diameter it also wouldn't flex as sharply. And therefore less
> chance of cracking.
>
> > -Original Message-
> > From: Chris Alb
the
printer.
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abilize that. Sketches would be great.
> > > >
> > > > Methinks a part that surrounds the blue gear and extends over the
> green
> > > > and they also have a bearing race between. Or we make a similar
> > bearing
> > > > mount to t
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h
> > > pinion (I think)
> > >
> > >
> > > --
> > > atp
> > > "A motorcycle is a bicycle with a pandemonium attachment and is
> designed for the especial use of mechanical geniuses, daredevils
> > > and lunatics."
> > > - George Fitch, Atlant
On Sun, Dec 12, 2021 at 12:39 PM Gene Heskett wrote:
> On Sun, 12 Dec, 2021 at 2:54 PM, Chris Albertson <
> albertson.ch...@gmail.com> wrote:
>
>
> To: enhanced machine controller (emc)
> I'm surprised that people don't use kinematics to remove the residua
a spherical tool)
On Sun, Dec 12, 2021 at 9:47 AM Gene Heskett wrote:
> On Sun, 12 Dec, 2021 at 12:13 PM, Chris Albertson <
> albertson.ch...@gmail.com> wrote:
>
>
> To: enhanced machine controller (emc)
> Would "non-trivial kinematics" correct for non-square mec
Thank you.
>
> Cheers, Gene
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> .
> __
autoartisans.com/harmonicdrive/HarmonicDrive-11.jpg
>
> This type of flex cup if not made of metal would be better with a cross
> hatch carbon fibre in flexible epoxy.
>
> John
>
>
>
>
>
> ___
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> Em
cked and unlocked.
>
> John
>
>
> > -Original Message-
> > From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> > Sent: December-01-21 2:59 PM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] Harmonic Drive
> >
>
nd can import that and then save as the
> "Housing.AD_PRT"
>
> It's still a clumsy step file type of import that doesn't have the same
> ease of use editing that parts built with Alibre have but at least it's
> editable and some of the very poor features of th
rough the bearing out of metal and making
> the companion mounting plate for the cup out of metal would allow a coupler
> shaft through from the wave generator disk to the centerline of the drive
> bearing. This would likely also clean up any wobble from thin printed
> plastic.
l don't have
> the tools to make a proper email agent work..
>
>
>
> Take care and stay well John.
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puts the bearings 1mm further out. Was also
> able to bring it a bit closer to the motor so the bearings now sit in the
> middle of the fixed spline gear.
>
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>
>
>
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y hard problem that is not yet fully
solved. Loading a dishwasher or cleaning a toilet is an IMPOSSIBLE task.
All blue collar jobs are very secure for a LONG time.
.
On Thu, Nov 18, 2021 at 10:16 AM Bari wrote:
> On 11/18/21 00:54, Chris Albertson wrote:
>
> >
> > I'm working
tution Newspaper, 1912
>
>
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e it could achieve.
I'm working on some 4+ axis CAM that if the machine and the work holding
> devices are included the physics engine will check for collisions to
> prevent crashes.
>
I assume this is unrelated to the above. Do you have anything working yet
to show us?
--
Chr
I'll start there.
>
> I really appreciate the kind and helpful responses here, y'all are great!
> Ian
>
> On Wed, Nov 17, 2021 at 8:54 PM Chris Albertson >
> wrote:
>
> > On Wed, Nov 17, 2021 at 3:07 PM theman whosoldtheworld <
> > bleachk...@gm
...@autoartisans.com> ha scritto:
>
> > Very cool. Thanks for the link.
> > John
> >
> > > -Original Message-
> > > From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> > > Sent: November-17-21 8:45 AM
> > > To: Enhanced Machine Co
geniuses, daredevils and
> lunatics."
> — George Fitch, Atlanta Constitution Newspaper, 1912
>
>
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?
>
> many thanks for any tips and advice,
> Ian
>
> --
> Ian Charnas | Engineer | iancharnas.com <http://www.iancharnas.com>
>
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t; I was under the impression that the Mesa required dedicated Ethernet so
> UDP packets wouldn't be delayed. JohnSent from my Samsung S10
> Original message From: Chris Albertson <
> albertson.ch...@gmail.com> Date: 2021-11-16 9:51 a.m. (GMT-08:00) To:
> "
probe I'd rather be right there with my
> hand on the ESTOP.
>
> John
>
>
>
>
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9PC7
>
> Thanks,
> -- Ralph
>
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_
quot; a minute.
> > Putting a 5i25 in it and it ran about 50 ipm w/o any stutters.
> >
> >
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> > https://lists.sourceforge.net/lists/listinf
gt; Emc-users mailing list
> > > Emc-users@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> > Peter Wallace
> > Mesa Electronics
> >
> > (\__/)
> > (='.'=) This is Bunny. Copy and paste bunny into your
> > (")_(") signature to help him gain world domination.
> >
> >
> >
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>
>
> 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, 1940)
> If we desire respect for the law, we must first make the law respectable.
> - Louis D. Brandeis
> Genes Web page <http://geneslinuxbox.net:6309/gene>
>
>
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;
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t; https://photos.app.goo.gl/QNDzVJmnD9HWjs8LA
> >
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> >
>
&g
ad encoder command
>
> We already determined that ours are using RS485, so this seems to confirm
> we are looking at right things. Anybody ever tried interfacing such
> encoders to LCNC?
>
> Thanks,
> -- Ralph
>
> ___
> Emc-use
AM26LS31CN which has 4 channels. See attached schematic.
>
> A differential receiver at the other end and using twisted pair 100Ohm
> impedance wire with 100 ohm resistors at both ends creates a nice balanced
> transmission line more immune to interference.
>
> John Dammeyer
&g
ductance, especially if
> coiled up and there is capacitance per foot/meter rating on various
> cables. It may or may not be important depending on the noise frequency.
>
> John Dammeyer
>
> > -Original Message-
> > From: Chris Albertson [mailto:albertson.ch...@gma
lanta Constitution Newspaper, 1912
> >>
> >>
> >> ___
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nd is
> > designed for the especial use of mechanical geniuses, daredevils and
> > lunatics."
> > � George Fitch, Atlanta Constitution Newspaper, 1912
> >
> >
> > _______
> > Emc-users
t;>> going into it which is isolated from the metalic case. I would
> >>>>> also verify that the encoder has a good ground to its metalic
> >>>>> housing. Painted brackets are a recipe for failure. As are
> >>>>> metallic shaft couplers. The elastomeric coupler that came with my
> >>>>> omron, failed a year ago, and the coupling is now a couple layers
> >>>>> of heat shrink with the inside layer of thermal glue. If it fails,
> >>>>> replace it with a fresh copy. 50 cents maybe.
> >>>>>
> >>>>> 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, 1940)
> >>>>> If we desire respect for the law, we must first make the law
> >>>>> respectable. - Louis D. Brandeis
> >>>>> Genes Web page <http://geneslinuxbox.net:6309/gene>
> >>>>>
> >>>>>
> >>>>> ___
> >>>>> Emc-users mailing list
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> >>>>> https://lists.sourceforge.net/lists/listinfo/emc-users
> >>>> ___
> >>>> Emc-users mailing list
> >>>> Emc-users@lists.sourceforge.net
> >>>> https://lists.sourceforge.net/lists/listinfo/emc-users
> >>> Cheers, Gene Heskett.
> >> ___
> >> Emc-users mailing list
> >> Emc-users@lists.sourceforge.net
> >> https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> > Cheers, Gene Heskett.
>
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stub on the end held in a 4th axis?
>
> Any suggestions are welcome.
> John
>
>
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Redon
at 100
> or more megahertz. And tends to be very dim on a analog scope. I
> actually have 3, a 30 yo Hitachi 100 mhz dual trace analog, much better
> than a tek of the same vintage, a 5 yo digital with the same specs you
> can get for $300 or so today, and I just bought Siglents best, a 4
tatically coupled electrical noise
> floating around find the easiest path to ground resulting in the lowest
> impressed voltage on the wire.
>
> John Dammeyer
>
>
> > -Original Message-
> > From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> > Sen
=com_content&view=article&id=11
>
> I don't have an oscilliscope so am relying on Halscope at the moment.
>
> Thanks,
>
> Pete
>
>
> On 11/10/2021 02:58, Chris Albertson wrote:
> > sorry there was no part number on the encoder. I figured it was the
> g
dividers eliminate the ‘ghost
> pulses’ being picked up by the Pico board?
>
> The encoder won’t be running above 3,000 rpm.
>
> Pete
>
> > On 10 Oct 2021, at 19:00, Chris Albertson
> wrote:
> >
> > Is your math right? Yes, I get 83 KHz for a 500 line encoder
17kHz
> which is 4% of the opto max 10 Mbps capabilities if the encoder was 2500
> line.
>
> But his is 500 line so at 166.7 RPS is 83kHz which is 0.8% of opto
> capabilities.
>
>
> John
>
>
>
>
> ___
> Emc-users
gs are connected.
> > >
> > > John
> > >
> > >> -Original Message-
> > >> From: Peter Hodgson [mailto:peterjohnhodg...@gmail.com]
> > >> Sent: October-09-21 1:38 AM
> > >> To: Enhanced Machine Controller (EMC)
achine and it's mounting bolts as grounds.
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/gene>
> >
> >
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> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
>
>
> --
> Addressee is the intended audience
"There are four boxes to be used in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> If we desire respect for the law, we must first make the law respectable.
> - Louis D. Brandeis
> Genes Web page <http://geneslinuxbox.net:6309/gene>
>
>
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nd insert foot. To wit: a sine for acceleration should give a
> more gentle startup and approach to end point. Of course implementation
> is left as an exercise for the student. ;-)
> Now I'll shut up and go away.
>
> Dave
>
> On 9/22/21 11:28 AM, Chris Albertson wrote:
et result is that I must limit its cuising speed and accelleration
> in order for it to coast to a stop using its own friction while avoiding
> the use of reverse to stop, usually a quite small fraction of a degree
> early. And that is about 10 to 15% of the speed it can move with the
> fu
at they can not be back driven due to friction. I don't
know how to calculate the load on the motor when the motor is opposing
ditection of movment. There might be (?) large frictional loads. We also
don't know how the driver electronics works.
>
> Chris Albertson
Redondo Beach
s on a 50 us clock.
> The manual is available online.
> Dave
>
> On 9/19/21 5:12 PM, Chris Albertson wrote:
> > Is the PID controller running on the PC under LCNC or is this an external
> > PID controller you built?
> >
> > What are the numbers, the loop period, motor spe
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