> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> If using a microcontroller to do steps, you would be taking advantage of
> one of the on-chip hardware counters. These have a top speed of some MHz.
> and then the software only has t stuff a few registers to set up the
> required step
On Sun, 16 Aug 2020 at 02:42, John Dammeyer wrote:
> Or maybe I'll grow to really like pure CNC on my system and the project will
> die a slow death.
I can very much see why you want to be able to use your lathe without
CAM and G-code.
In fact I very rarely use G-code directly in my lathe.
> -Original Message-
> From: andy pugh [mailto:bodge...@gmail.com]
> Just an observation:
>
> LinuxCNC is a CNC controller that runs under Linux.
>
> The clue is in the name.
>
> If you want something else, LinuxCNC probably isn't even a good starting
> point.
There is a tendency for
> From: Bari [mailto:bari00...@gmail.com]
> I was not arguing just for the sake of arguing. I'm trying to nail down
> what exactly the other idea is with LinuxCNC and microcontroller and who
> will work on it.
>
Dave Matthews posted about the USB to Parallel dongle. That's the start of
this
If using a microcontroller to do steps, you would be taking advantage of
one of the on-chip hardware counters. These have a top speed of some MHz.
and then the software only has t stuff a few registers to set up the
required step rate.
Same for decoding quadrature. There are hardware decoders
Just an observation:
LinuxCNC is a CNC controller that runs under Linux.
The clue is in the name.
If you want something else, LinuxCNC probably isn't even a good starting point.
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical
On Saturday 15 August 2020 18:10:52 John Dammeyer wrote:
> Hi Gene,
>
> > Its big and bulky as I started about 5 years ago with a Mesa 7i90
> > and bad grounding, too many loops generated enough noise I destroyed
> > the 1st 2 7i90's, So I cleaned up my grounds AND invested in 3
> > 7i42TA's
One must make many wise choices to make a machine operate properly.
On 8/15/20 6:33 PM, John Dammeyer wrote:
You just need to make a wise choice for the x86 PC.
That's a key statement. It's perfect and works with absolutely everything as
long as you only are wise enough to use component X.
> From: Bari [mailto:bari00...@gmail.com]
> For stepper powered open loop mechanical systems no Mesa hardware is
> required in between the x86 PC or the Orange pi and the stepper drivers.
> You can use Mesa in between if you wish or require very high step rates
> or much more IO, etc. You just
The reality that you are using a Pi4 or an AMD motherboard from 2005 to 2019 is
then just not really important.
It's what's between that and the mechanicals and it's not the Pi4. It's MESA.
An OrangePi may only be around for a couple of years. Then discontinued.
Maybe in 20 years I won't
Hi Gene,
>
> Its big and bulky as I started about 5 years ago with a Mesa 7i90 and bad
> grounding, too many loops generated enough noise I destroyed the 1st 2
> 7i90's, So I cleaned up my grounds AND invested in 3 7i42TA's which
> helped the wireing immensely, and gobbled up the remaining noise,
On Saturday 15 August 2020 15:09:19 John Dammeyer wrote:
> Hi Gene,
>
> > Thats a pretty tall order, John, and we both know it. Looking at the
> > various *-pi's, some of which are actually driving machines quite
> > well, some may not think these are a pc, but despite their credit
> > card size,
On 8/15/20 3:18 PM, John Dammeyer wrote:
When I installed the latest Linux CNC last fall onto several different Lenova
PCs they all failed the latency test for stepping past about 25kHz. Adding
external low profile video boards made it even worse. I bought 3 different
cards that fit those
Hi Bari,
>> speed low latency it's now PCs w/o parallel ports and built in video that
>> makes a PC a bit of a crap shoot.
> Onboard video hasn't been an issue with latency for the past 10 years or
> so. I have been using AMD motherboards for the past 20 years without any
> onboard video causing
On 8/15/20 1:13 PM, Gene Heskett wrote:
I don't know exactly what Bari is doing with his *.pi,
but if you take inventory of everything I am doing with this rpi4, I
think most will be impressed. I'd go so far as to say amazed. Cutting
air making 50 copies of the chess pawn with that rpi4, I went
On 8/15/20 12:13 PM, John Dammeyer wrote:
The PC is complicated and people are obliged to use an OS they really have no
control over. (Unless they want to learn the complete Linux OS ins and outs).
Depending on your experience and education any electronic device can be
easy to understand
Hi Gene,
> Thats a pretty tall order, John, and we both know it. Looking at the
> various *-pi's, some of which are actually driving machines quite well,
> some may not think these are a pc, but despite their credit card size,
> they ARE a pc. I don't know exactly what Bari is doing with his *.pi,
On Saturday 15 August 2020 13:13:36 John Dammeyer wrote:
> > From: Bari [mailto:bari00...@gmail.com]
> > Honestly asking, why spend the time?
>
> It's a good question.
>
> > Did a PC abuse people in any way during the 00's or maybe the 90's?
>
> The PC is complicated and people are obliged to use
> From: Bari [mailto:bari00...@gmail.com]
> Honestly asking, why spend the time?
It's a good question.
>
> Did a PC abuse people in any way during the 00's or maybe the 90's?
The PC is complicated and people are obliged to use an OS they really have no
control over. (Unless they want to learn
The point of 300,000 steps per second is in the difference between
the fastest speed you want your motors turning at and the second fastest
speed you want your motors turning at. If you want to be able to run at
10,000 steps per second, you can't use a a system that has a maximum
step rate
On 8/15/20 3:46 AM, Chris Albertson wrote:
What are you missing? THe Orange Pi is not a microcontroller. It is a
small size PC. It runs Linux and acts like a PC,I microcontroler is a
single chip with a much less powerful CPU and memory measured in Kilo and
mega bytes, not gigabytes. And
An Orange Pi has an integrated microcontroller that may be used for
stepping to >400KHz. It already does what you are mentioning internally.
I haven't explored how fast that it can read encoders yet for closed loop.
On 8/15/20 3:46 AM, Chris Albertson wrote:
What are you missing? THe Orange
Update: Back to production on this ratty bit of plastic. Had a heck of a
time getting the last, and still a bit small, bearing carrier made
yesterday, because the ejector motor was back hopping and I had to slow
the feed rate way down and help the fiber from time to time, coming to
the
On Fri, 14 Aug 2020 at 21:21, cogoman via Emc-users
wrote:
> May I suggest the shoulders of KevinOConner to stand on.
> Check out https://www.klipper3d.org/
There are other places to look.
Like the STMBL project. which already has STM32 code that looks like a
Mesa Smart-serial device and
On Sat, 15 Aug 2020 at 09:49, Chris Albertson wrote:
> If you don't need RT Linux then maybe you don't need Linux
Or LinuxCNC.
You seem to be losing sight of what LinuxCNC is. LinuxCNC is a CNC
controller that runs on Linux.
What you are describing is a CNC controller that runs on an STM32.
On Saturday 15 August 2020 00:57:10 Chris Albertson wrote:
> What you want should be possible, if only some one would spend some
> months working of the software.I use this little STMF104 for
> motion control (but not for CNC) and the STM32F104 can generate pulses
> far faster them my motors
What are you missing? THe Orange Pi is not a microcontroller. It is a
small size PC. It runs Linux and acts like a PC,I microcontroler is a
single chip with a much less powerful CPU and memory measured in Kilo and
mega bytes, not gigabytes. And they don't run Linux.
The Orange Pi or a PC
Honestly asking, why spend the time?
Did a PC abuse people in any way during the 00's or maybe the 90's?
The Orange Pi is generating steps >400Khz and runs LCNC for cheap and
is not a PC.
I'm looking for pathology to support a theory for anti-x86 PC machine
control sentiment.
What am I
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