to as TWAT
> tubes back in Nike Hercules tech school in 1977.
>
> Dave
> ex MOS 22L
>
> On Tue, Mar 19, 2024 at 4:35 PM gene heskett wrote:
>
> > On 3/19/24 14:15, Robin Szemeti via Emc-users wrote:
> > > I purchased a couple of large travelling wave tube amplifiers
And Mouser! Black list mouser as they sell all sorts of high power
MOSFETS and IGBTS that could be used to construct drives for the same
purpose. And all non ferrous metals stock holders ... they sell brass and
bronze that could be used for the bearings, have they no shame?
On Tue, 19 Mar 2024
I purchased a couple of large travelling wave tube amplifiers in an
auction. I phoned the US company to ask about schematics and a manual ...
"can we have the serial numbers please?" ... "sure ... " "great and what
date did you sign the ITAR agreement?"
On Mon, 18 Mar 2024 at 17:45, gene
Works fine here ...
On Tue, 8 Aug 2023 at 08:59, Marius wrote:
> Hi
>
> I am trying to install and upgrade but all the files that are downloaded
> from the linuxcnc.org server seem to take forever and eventually time
> out. Is there a problem or must I look elsewhere?
>
>
>
>
>
endmill versus the
> value of a 2.5 inch diameter 1.75 inch long plug of aluminum?
>
> -Original Message-----
> From: Robin Szemeti via Emc-users
> Sent: February 28, 2023 8:51 PM
> To: Enhanced Machine Controller (EMC)
> Cc: Robin Szemeti
> Subject: Re: [Emc-users
masking tape and super glue method:
> https://www.youtube.com/watch?v=e-coDYZCmEw
>
>
> On Tue, Feb 28, 2023 at 4:26 PM Robin Szemeti via Emc-users <
> emc-users@lists.sourceforge.net> wrote:
>
> > I'd mill it down do within 1 or 2 mm of the bottom of the material and
> &g
I'd mill it down do within 1 or 2 mm of the bottom of the material and then
swap to a smaller cutter to remove just the outer of the thinner material
and leave 3 supporting tabs. Remove the centre piece by hand and then do
a single full depth cleanup pass.
I do this a lot when routing sheet MDF
Yep, I'm planning to use the Mesa resolver boards, simply because I already
have a fair bit of Mesa kit. I expect resolution to be 14 bits and
accuracy to be 12 bits.
On Sun, 22 Jan 2023 at 16:52, Jon Elson wrote:
> On 1/21/23 19:34, Robin Szemeti via Emc-users wrote:
> > One thing t
lJINkhRQiZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=
> >
>
> On Sat, Jan 21, 2023 at 4:59 PM gene heskett wrote:
>
> > On 1/21/23 06:25, Robin Szemeti via Emc-users wrote:
> > > So, in a vaguely CNC related folly I have purchased a 2
that level off accuracy
with the Mesa board.
On Sun, 22 Jan 2023 at 03:21, gene heskett wrote:
> On 1/21/23 20:20, Robin Szemeti via Emc-users wrote:
> > That looks like a useful module ... sine for one of the coils, cosine for
> > the other, and simply multiply the cosine signal by
es
> ...
>
> I'll let you know how it pans out.
>
> On Sun, 22 Jan 2023 at 00:57, gene heskett wrote:
>
>> On 1/21/23 06:25, Robin Szemeti via Emc-users wrote:
>> > So, in a vaguely CNC related folly I have purchased a 2 axis military
>> dish
>> > mo
you know how it pans out.
On Sun, 22 Jan 2023 at 00:57, gene heskett wrote:
> On 1/21/23 06:25, Robin Szemeti via Emc-users wrote:
> > So, in a vaguely CNC related folly I have purchased a 2 axis military
> dish
> > mount for radio stuff (moonbounce, if you must kno
s a servo system is a lot like tracing the Moon,
> except the Moon is easier to track
>
>
>
>
>
>
>
>
> On Sat, Jan 21, 2023 at 3:26 AM Robin Szemeti via Emc-users <
> emc-users@lists.sourceforge.net> wrote:
>
> > So, in a vaguely CNC related folly I have
So, in a vaguely CNC related folly I have purchased a 2 axis military dish
mount for radio stuff (moonbounce, if you must know)
My plan is to control it from EMC, with a Mesa anything io card and the
resolver interface, I already have various Mesa cards under EMC, so thats
not an issue and I
I'll be surprised if you can find anythign with a parallel port, nothing
has them anymore, nor any real need to use them. Some random Mesa card
will be a better solution.
On Thu, 19 Jan 2023 at 07:20, John Dammeyer wrote:
> The MESA 7i92H is effectively two parallel ports with a bit more
>
Annoyingly .. it seems you can no longer get the XHC HBO4 pendant with the
single XYZA/sindle/feed knob ... all eBay has is the new ones with the two
knobs that lack the =1/2 and =0 buttons .. which I use a lot.
I'm getting bored moving the handwheel between machines, any idea where to
get one
Whenever I need to do this, I just export as DXF and use the standard
drilling tools in Cut2D .. works a treat, has automatic drill diameter
recognition etc.
Last board I drilled was 400 holes in some Rogers RO4003C ... and then I
did DIY plated through holes :)
On Tue, 1 Nov 2022 at 21:20,
FreeCAD barely does CAD either ... best avoided. If you have used
SolidWorks, trying FreeCAD is like slamming your gingers repeatedly in the
desk drawer. Last time I tried it, if you removed a feature from the stack,
the remaining features re-numbered themselves, but didn't renumber the way
Assuming you want to machine it rather than 3D print it, consider Tufnol.
https://www.theplasticshop.co.uk/tufnol-whale-brand-sheet-rod-tube.html
On Mon, 10 Oct 2022 at 23:40, gene heskett wrote:
> On 10/10/22 11:35, Thaddeus Waldner wrote:
> > The reason why PLA and PETG work so well with
That's what I have ... I have it wired directly to the ethernet port on the
Pi, I just used a normal cable, Note that when LinuxEMC takes over control
of the port, you can't use it for internet/IP connectivity (or at least I
can't) so you'll need some other interface in addition to that if you
The output is open collector NPN ... so if you need PNP (why?) then just
use a PNP transistor like so:
[image: image.png]
But why do you think you need PNP output? The device has an open collector
NPN output, just hook a resistor to whatever voltage you need (if your
system is using 24V for
I don't think the epoxy idea will fly ... or more to the point, I think it
will fly, but the direction of departure may be less than helpful!
Capscrews, possible, but again, I think I would worry about what happened
under load.
If it was me, despite it being difficult, I would either do it bit
Still needs a lot of work, like a tool library and bend angles instead of
ram heights, but its got the basics.
On Tue, 17 May 2022 at 06:21, andrew beck wrote:
> Hey guys check this out.
>
> Randie machine tools was nice enough to make some videos of how his press
> break runs on Linux cnc.
Personally, I would wire up some external driver simply to avoid any
accident with the 7i72 ... optos would be involved if it was me.
On Mon, 16 May 2022 at 01:27, Peter C. Wallace wrote:
> On Sun, 15 May 2022, Leonardo Marsaglia wrote:
>
> > Date: Sun, 15 May 2022 20:59:34 -0300
> > From:
And the new system is much better. Previously, when grubbing around in the
back of oily machinery, in poor lighting it was easy to get confused with
red yellow and blue wires ... the black/grey/brown colour scheme is much
easier to see ... errm?
On Thu, 12 May 2022 at 10:52, andy pugh wrote:
>
Imagine the part already has two bends ... one up, one down ... so it is a
Z shape ...
[image: image.png]
The backstop (blue) needs to be higher up ... many of the more advanced
brakes can adjust each backstop vertically and left-right
On Tue, 26 Apr 2022 at 17:52, John Dammeyer wrote:
>
Got it. All the ones I have used have always worked on setting up a lower
tool height and V width, an upper tool height, material thickness and
desired bend angle... but, I suspect 90% of the work is done in getting to
where you have got to, as in the end, that just ends up as a final ram
, 25 Apr 2022 at 00:00, andy pugh wrote:
> On Sun, 24 Apr 2022 at 21:03, Robin Szemeti via Emc-users
> wrote:
> >
> > Very interesting, presumably it can step through pre-programmed sequences
> > of bends setting new XYZ values for each step of the program?
>
> FWIW t
Very interesting, presumably it can step through pre-programmed sequences
of bends setting new XYZ values for each step of the program?
On Sun, 24 Apr 2022 at 18:22, Ted wrote:
> > Subject: Re: [Emc-users] Variables for instantaneous transit vector
> > from python? (long)
> > Message-ID:
And ... just bear in mind that the STG II card was ISA bus (good luck
finding anyone making those anymore) and is now 20 years old ... for a
couple of hundred bucks you can buy an equivalent and modern Mesa card that
is fully supported, PCI bus, etc.
Whilst it would not be impossible to build an
Did you contact the copyright holders for the STG cards and ask them if you
can manufacture the product? That would be your first step.
On Fri, 1 Apr 2022 at 19:58, Dominic Francisco wrote:
> Big Howdy to the Group:
> Our 501, C-19 non-profit, veteransinitiatives.org, is a small school,
>
https://www.youtube.com/watch?v=WnQV8E8Ja5E
On Mon, 28 Mar 2022 at 12:23, andy pugh wrote:
> On Mon, 28 Mar 2022 at 03:29, Thaddeus Waldner wrote:
>
> > Ah! I just saw that P0 is for the active coordinate system. Is P
> optional?
>
> I think that 0 is assumed if P is omitted
>
> --
> atp
> "A
More obviously, run the motor at its rated speed, change one of the pulleys
to give you your desired spindle speed.
On Thu, 24 Mar 2022 at 17:33, heritagespringerguy--- via Emc-users <
emc-users@lists.sourceforge.net> wrote:
> A VFD w/ anti-snoring features.
>
> Love it!
>
> > On Mar 24, 2022,
gateway made from an old router
...
On Sun, 6 Mar 2022 at 17:46, gene heskett wrote:
> On Sunday, 6 March 2022 06:35:56 EST Robin Szemeti via Emc-users wrote:
> > The Pi4 and a Mesa ethernet card seemed like a brilliant idea when I
> > bought mine ... I now regret it. The netwo
t 3:40 AM Robin Szemeti via Emc-users <
> emc-users@lists.sourceforge.net> wrote:
>
> > The Pi4 and a Mesa ethernet card seemed like a brilliant idea when I
> bought
> > mine ... I now regret it. The networking nightmare it has caused is
> > painful. There is
Apart from anything else, even using fast ethernet and a switch rather than
a router, there should be ample bandwidth to accommodate both the low
bandwidth comms with the Mesa card and other stuff .. however as as you
fire up linuxcnc, the other ethernet connectivity appears to disappear.
What I
Have you succesfully got the USB3 adapter to work with the Pi? If so, what
make/model is it, I will happily purchase one if it is known to work. I
wasted an afternoon trying to get one I borrowed from one of my kids to
work on the Pi4 and gave up, so a known working version would be a great
help.
The Pi4 and a Mesa ethernet card seemed like a brilliant idea when I bought
mine ... I now regret it. The networking nightmare it has caused is
painful. There is no WiFi down in my shed, only wired ethernet, so I had
to put in a WiFi to ethernet bridge, connectivity is odd, sometimes it
appears
If you can tilt the head at an angle, then something as simple as "G1
X300.00 B30.00" will do it, depending on how you have configured the B
axis. If you can't tilt the head, no amount of GCODE will help you.
I'd just do it on the lathe ...
On Sun, 13 Feb 2022 at 16:54, gene heskett wrote:
>
sell their drivers which are limited to
> 80VDC.
> > >
> > > Similarly the stepper motor suppliers provide 1/2 step curves leaving
> out the resonance point so unless you stay below this 'corner
> > frequency' and never reach that point the torque curves are somewhat
> obscure.
rque. That's why a stepper motor with a 24V
>> power
>> > > supply has the same holding torque as one with a 48V power supply.
>> The
>> > > current limiting of the drive holds the winding current at 3A. But
>> run it
>> > > at 24V or at 48
> run it
> > > at 24V or at 48V you get a totally different torque curve.
> > >
> > > If you are going to mention something called the corner frequency of a
> > > stepper motor+drive please show us the graphs and specifications. I
> > > haven't been able to find
What people continually get totally wrong with steppers is failing to
understand that the maximum power is delivered at the corner frequency, and
power output is constant above that.
If you have an application that needs to move at say 2m a minute and your
stepper stalls, there seems to be some
If using microstepping drives, you will struggle to get fast enough pulses
out without external pulsgen ... you need around 20kHz to get the motors up
to corner speed .. below that, you are not getting max power from the
motors, so I think you will struggle.
On Fri, 4 Feb 2022 at 02:49, Kenneth
They sound smooth enough at PID=100, but that was low speed, what do they
sound like at full operating speed?
On Wed, 2 Feb 2022 at 14:19, Thaddeus Waldner wrote:
>
> copy-paste from terminal:
> uname -a
> Linux linuxcnc 4.19.71-rt24-v7l+ #1 SMP PREEMPT RT Fri Jan 1 21:15:16 GMT
> 2021 armv7l
I suspect the problem will not be the changes to LCNC, but the wrong
version of the OS ... I'll have a look though, as that looks easy enough.
On Mon, 10 Jan 2022 at 19:52, andy pugh wrote:
> On Mon, 10 Jan 2022 at 18:53, Robin Szemeti via Emc-users
> wrote:
> >
> > I'll p
I'll probably just leave that one alone then, it spends most of its time
cutting aluminium, where it isn't a problem. I'd rather just have it
working than spend too much time re-configuring it.
On Mon, 10 Jan 2022 at 18:31, andy pugh wrote:
> On Mon, 10 Jan 2022 at 14:15, Robin Szemeti via
the latest available
version for that platform.
I'll check what it actually is next time I am in there. I might as well
take the stuff to hook it up to the interwebs and do an update while I am
there too.
On Mon, 10 Jan 2022 at 13:11, andy pugh wrote:
> On Mon, 10 Jan 2022 at 12:49, Robi
How old is your copy of LCNC? I just ran your code on my plasma and it
> ran smoothly with no detectable hesitation on the transitions between arcs.
>
> Les
>
> On 10/01/2022 12:08, Robin Szemeti via Emc-users wrote:
> > I've not built any plasmas in years :) I eventually got o
on CNC
> plasma for this reason.
>
> Les
>
>
> On 08/01/2022 12:32, Robin Szemeti via Emc-users wrote:
> > I built a few plasmas with EMC, the trajectory planner was a problem at
> the
> > time with it not being able to smoothly keep going between IJ arcs. Thi
>
> lots of users including many for commercial purposes.
>
> On Sat, 8 Jan 2022, 12:36 Robin Szemeti via Emc-users, <
> emc-users@lists.sourceforge.net> wrote:
>
>> I built a few plasmas with EMC, the trajectory planner was a problem at
>> the
>> time with
I built a few plasmas with EMC, the trajectory planner was a problem at the
time with it not being able to smoothly keep going between IJ arcs. This
can cause problems in thin sheet ... maybe it is better now.
I always had trouble keeping the HF from the arc start out of the
electronics.
On Sat,
Out of interest, how is PathPilot related to LinuxCNC?
On Tue, 4 Jan 2022 at 17:03, Rick Moscoloni wrote:
> Nice Work Done by Them!
> https://www.youtube.com/watch?v=xFjR_Kr6JOE
>
> El lun, 3 ene 2022 a las 1:21, Ralph Stirling (<
> ralph.stirl...@wallawalla.edu>) escribió:
>
> > Tormach has an
The Bridgeport "Interact" series? Readily available on Fleabay and not
stupid money either.
On Sun, 26 Dec 2021 at 15:22, Andy Pugh wrote:
>
>
> > On 26 Dec 2021, at 13:44, Mark wrote:
> >
> >> stallation or do a number of standard operations.
> >
> > Sure. As long as you can guarantee that
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