Hi All
I have a problem with a machine using servos. It is a 4 axis machine
with the 4th axis being rotary. The linear servos are tuned and working
very well but the rotary axis is not behaving well. It has a severe
oscillation and I cannot seem to get the PID trimmed to stabilize the
servo.
Cost might be an issue. When the entire computer costs $35, adding
$30 to the total is quite a bit.
But I'm also thinking in terms of volume and space. With Ethernet I'd
need a switch and that increases the volume by maybe 30% I am
thinking about Machine Kit as a motion controller, for something
The 7i90hd might work for you. It uses SPI, not Ethernet. SPI is
about as fast as Ethernet
I am trying to figure out how a UDP packet might get "walked on" in a
modern Ethernet network. Back in the days of un-switched networks
that used either 10BaseT hubs (hubs not switches) or that used coa
On 10/24/2016 3:23 AM, Gene Heskett wrote:
> Opto's on the bob are a waste of protection with modern
> stepper drivers as they all have their own optos for all inputs.
> Properly driven, a 2M542 driver can exceed 350 kilohertz step rates. Put
> an opto on the bob and it will often fall over, stal
How about some pics of that modification?
From: Gene Heskett
PIMA, but the electronics are good, no laggy opto's to distort a pwm
signal, and they give a rail to rail output, sourceing or sinking 24
milliamps. Opto's on the bob are a waste of protection with modern
stepper drivers a
Why would UDP need resends on a shared ethernet port? There are no
collisions on a full-duplex port & switch (which is pretty much ALL of them
now-a-days.) Passive hubs went the way of the dodo.
On Mon, Oct 24, 2016 at 10:22 PM, Gene Heskett wrote:
> On Monday 24 October 2016 22:05:47 Mark Jo
It absolutely requires its own ethernet port, no router either. That's
because it's a realtime device and having to arbitrate would only make
unpredictable latency/jitter.
Like others are saying, the link for accessing your LAN probably won't
even suffer if you use wifi and a USB2.0.
I just us
On Monday 24 October 2016 22:05:47 Mark Johnsen wrote:
> On Mon, Oct 24, 2016 at 6:52 PM, Gene Heskett
wrote:
> > Greetings guys; I hope everyone has arrived back home without
> > incidents involving bent sheet metal or worse.
> >
> > 1. someone said the 7i92H needs its own dedicated ethernet po
On Mon, Oct 24, 2016 at 6:52 PM, Gene Heskett wrote:
> Greetings guys; I hope everyone has arrived back home without incidents
> involving bent sheet metal or worse.
>
> 1. someone said the 7i92H needs its own dedicated ethernet port,
> presumably because udp patckets are not subject to any attem
Greetings guys; I hope everyone has arrived back home without incidents
involving bent sheet metal or worse.
1. someone said the 7i92H needs its own dedicated ethernet port,
presumably because udp patckets are not subject to any attempts at error
correction resends if other traffic walks on a u
On 10/24/2016 03:47 AM, andy pugh wrote:
> On 24 October 2016 at 05:38, Nicklas Karlsson
> wrote:
>> I thought NML fulfilled same purpose?
It does. The "remote" part of NML lay unused for many years and
bitrotted, but Jeff Epler revived it in 2014, and it's in the 2.7
release. We have a test
Also consider that translation plays a role. Looking at an english "legal"
or legal like document is scary enough for regular english speakers. Add
in translation and then compound that scary feeling.
On Mon, Oct 24, 2016 at 3:38 PM, Nicklas Karlsson <
nicklas.karlsso...@gmail.com> wrote:
> NO,
So there is another mode I didn't mention. When accelerating or decelerating,
you're not at the specified cut speed, and the laser power must be reduced
proportional to the speed.
For that, it's gonna use the "fast" PWM ~(10-25KHz). The period will be fixed
but the duty cycle changes dependin
On 24 October 2016 at 20:36, wrote:
> Seems like it makes sense to handle this on the Mesa. It'd be a big task to
> understand the FPGA and recode it.
I don't think that there is any need for re-coding. (and I doubt that
it would be sensible to start sending JPG data to the FPGA).
The Mesa ca
NO, I stay with Linuxcnc. I stayed at place with procedures for five years but
once I got better economy I started to look for something else. Procedures is
tolerable if salary is good enough and I need the money.
This time I will look at NML as soon as there is enough time and do not care
abo
Well, Mesa was VERY awesome in that they open-sourced their VHDL code for the
FPGA, the transport format, and their drivers.
Seems like it makes sense to handle this on the Mesa. It'd be a big task to
understand the FPGA and recode it. But it sounds like it'd be of great benefit.
Or, alternat
On 24 October 2016 at 19:47, wrote:
> Pretty darn fast! Rastering can be 35 inches/sec and 100 dpi or more (more
> dpi is questionable, the beam is typically 0.008" dia). So, KHz changes.
So, in theory, changing the duty cycle of a 25kHz PWM at 3.5 kHz.
It is possible, on some hardware, to ru
On 24 October 2016 at 19:28, Stuart Stevenson wrote:
> What state is the database project I heard you are/were working on?
Stopped, basically.
Let me shake the bars a little.
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical gen
Pretty darn fast! Rastering can be 35 inches/sec and 100 dpi or more (more dpi
is questionable, the beam is typically 0.008" dia). So, KHz changes.
Rastering is done in two modes- one, you're modulating the power to make shades
or depth. Two, you're doing dithering and turning the laser on-of
He said "horrible" not "well defined". To be horrible yo'd have to
find many bullets in the C4 document that are not reasonable for
example he might object to"A patch MUST adhere to the code style
guidelines of the project if these are defined."
I doubt anyone would call that document ho
Andy?
What state is the database project I heard you are/were working on?
thanks
Stuart
--
Addressee is the intended audience.
If you are not the addressee then my consent is not given for you to read
this email furthermore it is my wish you would close this without saving or
reading, and cease
On 24 October 2016 at 19:06, wrote:
> I like to do fine-detail rastering. This does require rapidly changing the
> power level, so it's quite a different task that just turning on the laser
> with "Z".
Rastering with LinuxCNC doesn't work as well as it could.
Do you have a feel for how freque
I just acquired a really good CO2 laser tube, and going through building the
machine around it.
How mature is LinuxCNC for laser cutting? I see it was used for this several
years ago, although it seemed like a hack job.
I like to do fine-detail rastering. This does require rapidly changing th
I've used the 4-way tool I linked to with 12 ga to 22-24ga wire and it always
gave a perfect crimp with no adjustment or finessing.
Danny
Mark Johnsen wrote:
> On Mon, Oct 24, 2016 at 9:27 AM, Chris Albertson
> wrote:
>
> > Are you using the correct color terminal for the wire gage? I
I've used the 4-way tool I linked to with 12 ga to 22-24ga wire and it always
gave a perfect crimp with no adjustment or finessing.
Danny
Mark Johnsen wrote:
> On Mon, Oct 24, 2016 at 9:27 AM, Chris Albertson
> wrote:
>
> > Are you using the correct color terminal for the wire gage? I
So far I have used that 4-way tool I gave a link for with 12 ga down to like 22
or 24 ga, it always gave a perfect crimp with no fiddling or adjustment.
Danny
Chris Albertson wrote:
> Are you using the correct color terminal for the wire gage? If so
> and it is still loose one trick is
On Mon, Oct 24, 2016 at 9:27 AM, Chris Albertson
wrote:
> Are you using the correct color terminal for the wire gage? If so
> and it is still loose one trick is to fold the wire in half before you
> push it in the terminal,
>
Probably not... I bought a bunch of ChinoCo ferrules and they're al
On 24 October 2016 at 17:28, John Kasunich wrote:
> I think Nicklas might be referring to this:
> http://www.machinekit.io/community/c4/
> It's a formal sounding document
One reason for the fork was, I think, the lack of any formal process
for consideration and implementation of submissions t
Are you using the correct color terminal for the wire gage? If so
and it is still loose one trick is to fold the wire in half before you
push it in the terminal,
The adjustment compensates for tool wear, You need to do this after a
maybe few thousand terminals I always end up taking the whole t
I think Nicklas might be referring to this:
http://www.machinekit.io/community/c4/
It's a formal sounding document
On Mon, Oct 24, 2016, at 12:19 PM, Chris Albertson wrote:
> On Mon, Oct 24, 2016 at 8:37 AM, Nicklas Karlsson
> wrote:
> " ... horrible procedures for developers ..."
>
> Hard t
On Mon, Oct 24, 2016 at 8:37 AM, Nicklas Karlsson
wrote:
" ... horrible procedures for developers ..."
Hard to answer your question as it depends on what you think of as
being "horrible".Can you be specific?
They are using Git and do have some rules like your code has to
compile, pass self t
I have those crimpers and do like them w/ the exception that I don't know
how to turn the 'gear' to make the compression force stronger. They're a
little 'soft' for smaller dia wires. I pulled the screw out, but the
geared washer doesn't turn (the one w/ + and -), I suppose I need to
un-attach th
What kept me away from machinekit is I rembember they had a notice with
horrible procedures for developers similar as working for a large company. I
looked at it and turned away, are these procedures still there?
Regards Nicklas Karlsson
On Mon, 24 Oct 2016 10:47:58 +0100
andy pugh wrote:
>
On 10/24/2016 08:48 AM, dragon wrote:
> Just wanted to send out a big thanks to Stuart and the rest of the Helix
> Machine team for hosting us. I would also like to thank all of the other
> attendees for the knowledge and patience that they shared. I learned a
> lot and look forward to next year.
>
Just wanted to send out a big thanks to Stuart and the rest of the Helix
Machine team for hosting us. I would also like to thank all of the other
attendees for the knowledge and patience that they shared. I learned a
lot and look forward to next year.
-Todd
signature.asc
Description: OpenPGP di
On Monday 24 October 2016 05:56:53 andy pugh wrote:
> https://www.amazon.com/Signstek-Adjusting-Ratcheting-Crimping-AWG23-10
>/dp/B00HPRYIL8/ref=sr_1_5?ie=UTF8&qid=1477283614&sr=8-5&keywords=ferrul
>e&th=1
Looks usefull, bought the pair.
Cheers, Gene Heskett
--
"There are four boxes to be used
grazie molto
io ho3 floppyper il test
tomp tjtr33
--
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On 24 October 2016 at 05:41, Danny Miller wrote:
>
> BTW, about "loose connectors"- this ferrule stuff CHANGED MY LIFE on
> clamp-down-on-stranded-wire:
I wouldn't dream of clamping down on loose stranded wire any more.
You may need more than you think. There are a couple of hundred in this pict
On 24 October 2016 at 05:38, Nicklas Karlsson
wrote:
> I thought NML fulfilled same purpose?
I don't _think_ that Machinekit has NML any more. I think it has all
been replaced by something else (0mq possibly)
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for th
On Monday 24 October 2016 01:18:55 Chris Albertson wrote:
> Does the 7I90HD work with Linux CNC? It looks like it could work
> It looks like it would be the board to use with an ARM Pi3. It
> connects with the host using SPI which is easy to use in the Pi3
> 7I90HD is the lowest cost Mega FPGA
On Monday 24 October 2016 00:41:02 Danny Miller wrote:
> > Sounds like its the -H I'd want too. More conserving of horizontal
> > real estate. And while I'm not going to add yet another potential
> > loose connection to the home switch setup, these bobs I have have
> > such poor terminals that I
You can see some experiences with LinuxCNC, BeagleBone Black and NURBS
https://www.youtube.com/channel/UCjobmz18Hn_B-s89ctCoQmg
--
From:Prof. Ernesto Lo Valvo
Dipartimento di Architettura
Universita' di Palermo
Viale delle Scienze
90128 Palermo (Italy)
Tel: +39-091-23861845 (direct)
On 2016-10-24 07:18, Chris Albertson wrote:
> Does the 7I90HD work with Linux CNC? It looks like it could work
> It looks like it would be the board to use with an ARM Pi3. It
> connects with the host using SPI which is easy to use in the Pi3
> 7I90HD is the lowest cost Mega FPGA board at only $
On 2016-10-24 09:09, Gregg Eshelman wrote:
> Search for Raspberry Pi CNC hat. The Up Board has a Raspberry Pi compatible
> header so the Pi "hats" (as the daughterboards for the Pi are called) will
> plug onto it.
> I assume any of those that can be used with Linux on the R-Pi should work
> with
Search for Raspberry Pi CNC hat. The Up Board has a Raspberry Pi compatible
header so the Pi "hats" (as the daughterboards for the Pi are called) will plug
onto it.
I assume any of those that can be used with Linux on the R-Pi should work with
Linux on the Up Board.
Other SBCs are adopting the R
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