On Sat, 15 Feb 2020 01:56:44 -0500, Rafael Skodlar <ra...@linwin.com>
wrote:
On 2020-02-11 01:04, Chris Albertson wrote:
I said people *want* to use CNC like a laser printer. Most
setups are
not that good. It is a goal and if designing a new system. It is good
to
set the bar high and try to do what can't be done today. What I
really
meant was that with a printer, all the critical timing happens in the
printer. There are no servo-loops on the PC and you don't need a
real-time
OS to print to paper. I think people want CNC to work this way.
That's how some CNC machines work. I came across a small woodwork
business owner with very nicely garage that was converted into workshop.
Win PC in the corner for designing parts in CAD, large Axiom CNC machine
with a pendant to control it. Tiny LCD is all that's needed to select
the job, i.e. file from a USB stick.
The owner did not know what's inside the CNC machine itself and he
doesn't care. That's what you say Chris I think and I agree with.
I don't know if there's an option for connecting that CNC machine to
LAN. I would not use wireless connections for such as it's security
issue due to hacking possibility in the neighborhood. Another
possibility is noise on WhyFy frequencies from appliances, bad power
lines, etc.
In any case, that CNC machine does not have or need a PC computer with
modern GUI interface connected directly to run it. That's why I started
this discussion. X-windows is waste of resources, it's another thing
that needs to be maintained and updated in some instances. Too many
things to go bad in what's supposed to be a relatively simple embedded
system.
The tiniest user interface would be possible using extended ASCII
characters as in old DOS. We used to play with that in old email
signatures. My fun with ASCII art in the 1990s:
How did we get to the point where we decided that the goal is a
"relatively simple embedded system"? I for one am not looking to trade off
the current gui and it's features for what you describe.
It seems like a lot of this thread seems to steer itself in the machinekit
direction in terms of apparent goals/ideals, so I guess I'd ask, why not
start there?
. . . . . . . . o o o o O o
___________________ ___________ _____ O
| Rafael Skodlar | | LINUX | ____==== ]OO|_n_n__][.
| ra...@mydomain.com |=| Support |=||=[________]_|__|________)<
~~~~oo~~~~~~oo~~~~~ ~~oo~~~oo~~ oo oo 'oo OOOO-| oo\_
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
Add colors, lines, and block characters and ... you see the picture
that's taking extremely little memory by today standards.
Simple ASCII DRO + G-code scroll window and 4x4 keypad would be enough
for most work. No need for keyboard, mouse and X-windows on large
monitor.
On Mon, Feb 10, 2020 at 3:06 PM Bari <bari00...@gmail.com> wrote:
A laser printer is a good example of how people really want a CNC
mill to
work. You design you document on the computer then press "print" and
the
printer creates it. After the last of the data is moved to the
printer
you can turn the PC off it you like.
Why it's not that simple:
https://www.machinedesign.com/3d-printing-cad/article/21122653/top-11-myths-of-cnc-machining
the article states:
Myth #4: G/M Code is a Thing of the Past
That's true too. It amazes me that the industry did not go away from
primitive code by today standards. G-code was only modified or updated
by some CNC machines manufacturers as far as I know but most of G-code
is still the same. Compare that to computer/software advancements since
1980s. Perl, php, python, Go, html, etc.
Using G-code is like writing computer programs in assembly language! It
time to upgrade it to something like HP-GL with addition for Z and other
axis obviously. Such a language would make it much easier for human(e)
use. 4 to 6 letter long abbreviations for tool manipulation would still
make code terse enough to fit on smaller LCD displays and we could
remember the commands for small jobs after a while.
For start, HP-GL commands would need to be modified to accommodate
relative or absolute CNC tool movement.
Magazine Digital Machinist has some very cool CNC related articles but
you need to wait long for the next quarterly issue to follow them. None
of the advertisers mention LCNC ;-(
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