Ian,
Thanks for your report. I've reproduced the problem and I believe I've
fixed it. (A nod goes to SWPadnos for noticing the factor of 25.4
hidden in the numbers you cited)
(It is easy for anyone to see the problem by modifying sim_9axis.ini
to change [TRAJ]UNITS to mm. Then run emc. MDI to
Do you have limit switches?
If you do not, then remove the configuration for limit switches. In
stepconf, this means setting the pin setup to unused for pins which
are currently listed as limit of one kind or another.
If you do, verify that they are hooked up as you intended. Use halmeter
On Thu, Oct 16, 2008 at 04:38:09AM -0400, John Domville wrote:
No limit switches. Where do I find the step config ? Was that part of the
machine config
I set up originally through the config wizard?
Yes. If you are using stepconf, it's the page entitled parallel port
setup.
Yes. Using HAL, you can connect the same commanded position (e.g.,
axis.0.motor-pos-cmd) to any number of things, something like
net Xpos-cmd axis.0.motor-pos-cmd = stepgen.0.position-cmd
stepgen.4.position-cmd
You can only connect one feedback position, though:
net Xpos-fbd
For slow I/O like coolant, a device attached to a serial or USB port
can be appropriate in emc2. You'll probably have to write your pic
firmware and an emc2 hal driver in tandem, since there's not an
established protocol for this (unlike, say, stepdirection signals).
Conceptually, the PC side is
On Mon, Oct 20, 2008 at 04:50:11PM +0200, Sasa Vilic wrote:
This mean than, that I cannot use two servo motors for the same axis,
because each motor has its own encoder. Is it than possible to use two axis,
to control same joint?
In the case of two servo motors, you would have two pid
emc is capable of controlling 6 linear and 3 rotary axes. Your type of
machine might be called XYZUV when moving motors on both bridges.
I don't believe there are any configuration examples of wire cutting
machines. However, we'd be happy to help you get it working with
emc--it sounds like a
Any combination of axes is possible in emc, you can do XZUW and XYZUW if
that's what you prefer.
Jeff
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[Chris sent me this message in private, but then suggested that I should
send the answer to the list as well]
On Tue, Oct 21, 2008 at 07:23:35PM +, Chris Epicier wrote:
Hi Jeff
I'd be more than happy to get this up running through emc. The machine
is currently thought to have one single
Contouring mode: G64 P-
---
The P-number for G64 P- is a distance. This enables the naive cam
detector and enables blending with a tolerance.
Naive cam detector
==
Successive G1 moves that involve only the XYZ axes that deviate less
than P- from a straight
On Wed, Oct 22, 2008 at 08:10:26PM -0700, Dave Engvall wrote:
BTW - it appears that the hal stg driver doesn't have an index
output or am I again missing something.
If you mean a HAL pin which allows you to continuously monitor the state
of the physical index input, I believe you are
On Thu, Oct 30, 2008 at 12:34:36PM +, alan wrote:
So really my query is also about the future. Where will emc go if
parallel ports become a thing of the past?
It can go to systems that still have parallel ports, even after they
become unusual in new consumer PCs.
It can go to systems where
You are likely to see two kinds of encoders: TTL and differential
(rs422).
TTL means there's a single wire for the each signal (e.g. A), and it
roughly follows TTL voltage level for high and low signals.
differential means there are two wires for each signal (e.g., A+ and
A-). The logic-level
On Sun, Nov 02, 2008 at 06:34:01PM -0500, John Domville wrote:
In the pre-windows, DOS days it was possible to type:
DIR/W LPT1
By default, installing emc takes away all parallel-port devices from
regular linux programs. This reduces the kinds of problems where a
program tries to probe an
Hi Dave.
Yes, for stepper motor machines, emc creates a pulse for each and every
incremental motion of the motors -- a typical machine might have 8000
pulses per inch, and that machine moving at 2 inches per second would
generate 16000 pulses per second.
After interpreting the gcode, the details
On Tue, Nov 04, 2008 at 05:42:01AM -0500, Mark Wendt (Contractor) wrote:
Just curious, what size is the pulse word and what info
does it contain? Is there a velocity pulse, or are there separate
pulses for step and direction?
Most common are step and direction. Here's the anatomy
In emc 2.2.x, the emc script always tries to create a terminal to run
keystick inside.
In the development version, this has been changed. keystick will start
with DISPLAY unset (I just tested this with configs/sim/keystick.ini).
Here's the main change that made this possible:
Also, you'll have to specify the inifile directly on the commandline;
the configuration chooser is graphical only.
Jeff
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On Wed, Nov 05, 2008 at 03:56:59PM -0700, Carl Helquist wrote:
With the help of the responses so far I have keystick running in a
bash shell. For now I haven't applied all of Jon's changes to the emc
start script. Well, actually a copy called emcnox so I don't mess up
my currently
For trivial kinematics machines, emc should always stay within the
inifile acceleration limits. If it doesn't, there's a bug.
The main acceleration-related difference I recall for arcs is that
the centripetal acceleration required to follow the arc may affect the
maximum attainable velocity.
Here's the page I always refer to when emc's DRO shows something
different than what I expect:
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?CoordinateSystems#So_if_you_re_lost_what_should_you_do
Jeff
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On Sun, Nov 09, 2008 at 11:32:21PM +, Leslie Newell wrote:
Looking at the interpreter, it appears that X is always read with the
read_x function in rs274ngc/interp_read.cc. If that is the case, a
simple tweak to that function should be all that is needed. What is
would be the 'approved'
On the parport there is an 'in-not' pin for every 'in' pin.
http://www.linuxcnc.org/docview/html//hal_drivers.html#r1_1_2
it sounds like you should use in-not in your case:
net home+limitX parport.0.pin-11-in-not = axis.0.neg-lim-sw-in
Jeff
Welcome.
On Tue, Nov 11, 2008 at 09:47:42PM +0200, Ahmed Elghamrawi wrote:
So.. blah blah.. how i am what i do.. the point is: were to begin?
We have a fair idea what programming should be, studied that but we have
never did it for real. We don't have an actual machine in our hands yet, but
I'm pleased to announce the next release of the emc 2.2 series, emc
2.2.7. This version contains many bugfixes, including many enhancements
and bugfixes for the new hostmot2 (hm2) family of drivers for the Mesa
PCI and parport cards such as 5i20 and 7i33.
For users of the hostmot2 family of
On Tue, Nov 11, 2008 at 07:25:25PM -0700, Sebastian Kuzminsky wrote:
A couple of minor clarifications about the hostmot2 changes:
Thanks, sorry I didn't get it right in the original mail.
Jeff
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On Wed, Nov 12, 2008 at 09:58:37PM -0500, Kent A. Reed wrote:
Am I just imagining it or does the home directory name sporadically jump
back and forth between emc2.2.2.x and emc2_2.2.x as x increases?
For the .tar.gz from the package server, it should consistently be the
debian convention,
Please show us the list of kernel modules that are loaded immediately
after you log in but before you run emc.
You can do this by opening Applications Accessories Terminal, then
typing dmesg, then by pasting the result into your reply. The *top*
lines are probably going to be the important
On Fri, Nov 14, 2008 at 10:19:14PM -0700, [EMAIL PROTECTED] wrote:
What is L2?
What it does?
G10 L2 means that this operation is being applied to a coordinate
system.
In future versions of emc, other L values will indicate other things
being modified. FOr instance, G10 L1 will manipulate
On Sat, Nov 15, 2008 at 06:26:51PM +0100, Ádám Novák wrote:
Would geckodrives work with EMC2 for example with an I/O board
that creates STP/DIR signals to drive the motor?
You can use step+direction servos hooked to the parport with emc, but
this has two big drawbacks.
First, on dumb I/O like
negate [AXIS_#]SCALE
for stepdirection machines, you can also reverse the polarity of the
direction pin.
Jeff
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On Sun, Nov 16, 2008 at 06:30:24PM -0600, Heinz Reimer wrote:
In summary, for users of Sherline drivers who have problems with their
machine setup, I think the best bet is still to use the sample stepper
XYZA configuration, with ini file edited to match the factory settings.
Stepconfig
On Mon, Nov 17, 2008 at 10:50:32PM +0800, Howard Chan wrote:
http://myweb.polyu.edu.hk/~icwfchan/P1.png
This graph does not show measured noise in the DAC output. To measure
that you would have to hook a scope or other diagnostic equipment to the
physical DAC output pin on the mesa servo
Python programs can be userspace hal components. If I were faced with
this problem, I would make my enhanced jdi program have the necessary
hal pins, and connect them to whatever external signals have to drive
progress.
Jeff
There are several systems along these lines that already exist:
pico-systems ppmc, mesanet.com's 7i43, and pluto_servo all use the EPP
protocol for this purpose, and each one has established its own protocol
details.
There's also this project, though I'm not sure of the state of it:
On Thu, Nov 20, 2008 at 05:46:37PM -0700, [EMAIL PROTECTED] wrote:
I write simple program with G and M code, and safe it in .txt format.
When I open program in EMC2 it give error- bad code “377”
No, the actual error you encountered was almost certainly:
Bad character '\377' used
I have verified that saving a Text or Text Encoded file from
openoffice 2.4 is incompatible with emc. openoffice writes something at
the beginning of the file called a unicode byte order mark; don't
worry if you don't understand what that means, but *do* understand that
openoffice will apparently
emc2 does use the standard package management system on ubuntu, dpkg.
Within a release series, (e.g., during 2.2.x) you can upgrade with a
single .deb.
Going from 2.1.x to 2.2.x is more hairy, because we often require new
external packages.
To upgrade from 2.2.x to 2.2.7, download the relevant
On Fri, Nov 21, 2008 at 03:17:26PM +, acondit wrote:
Why are the hardy dists not also under
http://linuxcnc.org/emc2/dists/hardy/
like the dapper and breezy dists rather than
http://linuxcnc.org/hardy/dists/hardy/
Then you would only have to bookmark
On Fri, Nov 21, 2008 at 09:48:51AM -0600, Jack Coats wrote:
Is there still an issue with running with more than 1G of RAM?
Some have found the kernel version on the emc2 hardy live cd to be
incompatible with their system with 1GB ram, requiring the 'mem=900M'
trick mentioned elsewhere in this
With the 'net' line commented, use halcmd show to find the name of the
pin. perhaps there's a typo in your xml file or your hal file and you
haven't spotted it yet.
Jeff
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As far as I can tell, named subroutines aren't in 2.2.x. (they're in
the development version, and your test program works there)
However, I'm not sure why you don't get an error at the first line with
o. That should be fixed to give a clear error message instead.
Jeff
On Sun, Nov 23, 2008 at 09:30:25PM +, Mike Merrett wrote:
oA_routine1 sub
In the next bugfix release, this will now give the improved error
Bad number format
when the first line with o is encountered.
Can you indicate where you saw the named o-words mentioned so that I
can make sure it
I'm not aware of a specific reason why this was deactivated in our
kernels, if it was included in the ubuntu stock kernels.
If you want to rebuild your own kernel with this enabled (it should make
a kernel compatible with the regular emc2 packages), I detailed how to
do it back in september:
On Mon, Nov 24, 2008 at 05:57:39AM -0600, John Thornton wrote:
I found it and corrected it.
Thanks John.
This correction should already be in the online version of the docs, and
will be in the next bugfix update as well.
Jeff
On Mon, Nov 24, 2008 at 12:33:56PM -0800, Thomas L Marshall wrote:
Is it possible to simply compile the module and copy it in place???
No, not easily. The scripts for building the kernel do some complicated
things, and I'm not sure how to get things to the state where you can
just build one
If I understand correctly, you had a Breezy (5.10) system that you
upgraded to Dapper (6.06).
As a rule, we recommend *against* using the distribution upgrade to go
from one version of Ubuntu to another. This generally renders emc2
unusable, as you have discovered.
If you haven't yet erased the
At present, emc2 doesn't have any friction compensation. However, there
are several avenues you might go down to add it: in the motion
controller, or as a HAL component.
At first glance, it looks like the place to add this in the motion
controller would be in the function presently known as
What is the input circuit like on your stepper driver board? (pull-up,
pull-down, filter, buffer, opto, etc)
When you say that you didn't see this using ubuntu 8, do you mean the
linuxcnc.org 8.04 disc with emc2, or do you mean an unmodified ubuntu
downloaded from somewhere else such as
On Tue, Dec 02, 2008 at 04:21:38AM -0700, rtwas wrote:
Hello,
I upgraded to 2.2.7 and noticed that I am no longer able to execute the
touch-off menu or
even slew the axis manually after an M00 is encountered in the g-code
program.
Is this intentional?
As far as I know, emc2 has always
On Tue, Dec 02, 2008 at 01:07:43PM +0100, Rob Jansen wrote:
Hi,
I'm not sure this is related to M00
No, it's probably not.
I have a similar problem on my 2.2.2 system. At a sudden moment touch
off won't work anymore. As soon as I enter a value, the OK button is
grayed out.
A bug in
On Wed, Dec 03, 2008 at 10:06:28AM -0500, John Kasunich wrote:
It is probably the cheapest hardware step generation option, but that
shows. The quality of the board is marginal, connections are to tiny
headers, etc.
The price difference between knjn.com's pluto-p ($60) and mesanet.com's
emc has an X tool offset for lathes, but doesn't presently have a Y tool
offset.
Adding a Y tool offset involves touching a lot of code, from the tool
table parser to the interpreter to the user interfaces; it's not to be
undertaken lightly.
If someone contributes a patch we'd sure look at
Have you successfully used any devices with hal_input? If not, then
carefully read the section PERMISSIONS AND UDEV in the hal_input
manpage, and craft an appropriate rule for your device.
Jeff
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In the source tree,
emc2.2/src/emc/kinematics/trivkins.c
Jeff
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In the current version of emc, it's only possible to probe for one of
the transitions (G38.2: not touching to touching).
In the development version there are additional codes including G38.4
which is indeed indented for detecting when the probe goes from touching
to not touching. (There are also
On Wed, Dec 10, 2008 at 08:50:31AM +0800, ygdan1001 wrote:
Dear sir:
Firstly,thank you, Jeff!
But, I can't find the src file. I am a beginner in the Linux. I find in
place/file system/etc/emc2, is it right? Thanks a lot!
Regards!
No. The source files are normally useful only to
Here's a program that does something like what you asked for.
You might also be interested in the file 'interesting-subroutines.ngc', which
should be installed in the examples directory.
Jeff
(- CUT HERE --)
O100 sub (square [x0] [y0] [z0]
You can also view that file, useful-subroutines.ngc, from the comfort of an
internet-connected computer:
http://cvs.linuxcnc.org/cvs/emc2/nc_files/useful-subroutines.ngc?rev=1.4;content-type=text%2Fplain
Jeff
--
I'm pleased to announce the next release of the emc 2.2 series, emc
2.2.8. This release contains a fix for a rare bug that caused incorrect
movement for G2 and G3 arc moves, as well as a few other things.
The new packages are now available for Ubuntu 8.04 Hardy Heron in the
package repositories.
On Mon, Dec 15, 2008 at 11:05:08PM -0500, BRIAN GLACKIN wrote:
If I wanted to do multiples of a more complex part, could I simply do a
coordinate shift in the O100 subroutine, execute lines of code, return to
the global coordinate system and end that subroutine? It should reduce the
number of
A bunch of us, including Matt, John K, Peter and Seb worked further on
troubleshooting this on irc earlier.
This bug specifically affects hostmot2 systems where the step rate is
above 60% or so of the maximum step rate given the user specified step
length and space.
Peter has now identified a
On Wed, Dec 17, 2008 at 12:14:13PM -0700, Sebastian Kuzminsky wrote:
I'm not sure how the m5i20/hostmot driver handles this...
the old driver simply has this setting hardcoded, and can't chage it
without a recompile. I forget what value is hardcoded, though.
Jeff
After identifying things that cause large latencies, one possible
solution is to simply remember not to do that thing--at least if it's
something easy to not do, like start viewing a movie.
One nice thing about servo systems with hardware encoder counting is
that after a large latency, you'll get
I assume that you are using emc2 installed from our cd, and updated to
the latest version via the network.
When running emc from the terminal, you would type something like this:
cd ~/emc2/configs/my-mill
emc my-mill.ini
to run the my-mill.ini configuration in ~/emc2/configs/my-mill. You
note that after installing gettext, you probably need to re-run
configure for it to be picked up.
Jeff
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Typical steppinout:
IO Connections for P4
Pin#I/OPri. funcSec. funcChan Pin funcPin Dir
1 48 IOPort StepGen 0Step/Table1(Out)
3 49 IOPort StepGen 0Dir/Table2(Out)
5 50
When that happens, it indicates that the installer is not able to read
the cd. I'm not aware of any troubleshooting information that it is
useful to gather at that point, or any specific solutions to this
problem besides trying a new CD burn if you haven't already.
You might try downloading the
On Wed, Dec 31, 2008 at 09:21:10AM -0500, Donnie Timmons wrote:
I'm new and have made a request for some info and never received a reply. Is
this mail list work?
This message appeared on the list. However, it's the first message I've
ever received from you on the list.
Jeff
On Sat, Jan 03, 2009 at 05:41:49PM -0500, Donnie Timmons wrote:
I'm have some problem the first the first time I start EMC after power on I
get error and EMC will not start but start it again and it runs. Attached is
a copy of the terminal screen.
Do you use hal_manualtoolchange in your
It must be a different problem than the one I was guessing at .. if you
get any errors at shutdown, those would be useful to see. So would the
last 20 lines or so that are shown when you type 'dmesg' at the
commandline.
Jeff
On Tue, Jan 06, 2009 at 10:27:11PM +0800, ygdan1001 wrote:
Dear sir:
Now I download EMC2 directory in tarball to the windows and copy them onto
the CD. And put them into the Ubuntu, but I'm still confused.
1. Where I should put the directory if I compile the kinematic modle?
I don't know how
On Tue, Jan 06, 2009 at 12:32:08PM -0600, Len Shelton wrote:
I know this has been covered before, but I cannot find it...
How do you connect two pins to the same signal to be able to, for instance,
use two stepper motors on the same axis?
You can do this in one or more 'net' commands:
On
The things that Chris said last time when he nominated Sam still
ring true for me:
| I nominate Sam, who we all know as skunkworks on irc, for a Board
| position. He is a tireless advocate for EMC and generously helps
| and teaches many people.
|
| Sam is not an EMC programmer and previously the
Jeff
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I accept the nomination.
Jeff
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On Thu, Jan 08, 2009 at 06:54:37AM +, Leslie Newell wrote:
Looks good. It would be nice if you could enable these:
reading/writing motion's digital/analog ins/outs
I don't think it is possible to enable reading inputs. Consider the
following:
( already in cutter comp mode )
N000 G0
On Thu, Jan 08, 2009 at 09:01:54PM +, Leslie Newell wrote:
How is that handled currently?
( already in cutter comp mode )
N000 G0 X0 Y0
N100 G1 X1
N200 M66 P1 L0 (intended to say: immediately read digital input 1 to #5399)
N300 G1 Y[1-2*#5399] ( so this line either goes to Y1 or
On Thu, Jan 08, 2009 at 09:26:39PM +, Leslie Newell wrote:
Fair enough for exact stop but what about CV? It would potentially try
to look ahead past the read.
No, I believe you'll find it exact-stops at that point.
Jeff
emc 2.2.8 shows the following error when your gcode is loaded:
Radius to end of arc differs from radius to start:
start=(X-6.3015,Y0.2511) center=(X-6.3015,Y0.4633)
end=(X-6.1515,Y0.1890) r1=0.2121 r2=0.3126
this arc is noncircular by much more than the tolerance emc2 uses for
arcs.
You should go with John's proposed solution, using HAL realtime
components to perform the logic between the physical input and the panel
item. It's a much better idea than Stephen's.
Jeff
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A comment of the form (PROBEOPEN filename.txt) will open filename.txt
and store the 9-number coordinate of each successful straight probe in
it. The file must be closed with (PROBECLOSE).
http://linuxcnc.org/docs/html/gcode_main.html#sub:G38.2:-Straight-Probe
Jeff
As you showed in your first post, you can save the results of a
probe operation to another numbered parameter, if you want to use it
during the same part program.
The results of (PROBEOPEN) are for processing with some other software
according to the various needs of different users.
If you want
I'm pretty sure you're right: to work correctly, bot the command and
feedback of a PID have to be in the same units, e.g., in revolutions
per second.
Jeff
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On Mon, Jan 19, 2009 at 05:49:56PM -0500, Gene Heskett wrote:
select the sim stuff and it asks to copy the files to the users dir for
editing, and I confirm.
selecting one of the sims for axis (there seem to be 3 trees, sim, sim-1, and
sim-2, whats the diff?)
You create a new one every
Actually, I discovered that someone I had apparently already documented
a lot of this stuff on the wiki:
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?DebuggingRtapi
Including this item which is an important one:
To make gdb find the source files, it seems necessary to use the
On Tue, Jan 20, 2009 at 03:30:15PM -0500, Dennis wrote:
Is there ANY way to tell the precompiled EMC2 to run in simulation
mode? Or is my only choice to recompile EMC2 with the simulation flags set?
Unfortunately, this isn't possible, and we don't offer precompiled
--enable-simulator builds
It's worse than that -- in 2.2.x, stepconf will always use a mode called
doublestep, in which step pulse width is limited to 1/4 of the
BASE_PERIOD by the hardware driver even though the GUI will appear to
accept larger values.
This is an unfortunate limitation, but the changes to stepconf to fix
In motion.c:rtapi_app_main(),
rtapi_set_msg_handler(emc_message_handler);
emc_message_handler sends RTAPI_MSG_ERROR-level messages to task through
emcmotErrorPut, and task puts them in nml.
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starting from a stepconf file, you need to at least
* delete all the parport.0.pin-##-out-reset lines in your hal file
* delete the 'addf parport.0.reset' line in your hal file
* delete the 'setp parport.0.reset-time' line in your hal file
* set the steplen and stepspace parameters to datasheet
Installing the package
linux-ubuntu-modules-hardy-rtai
makes certain additional hardware work with our modified kernel.
If you have to download them manually, I believe these are the two files
you need to install:
On Tue, Jan 27, 2009 at 01:15:18AM -0200, Richard Acosta wrote:
Hello again, there is something i'm missing, or i can't understand.
Should i recompile EMC or hostmot after modifying that file?
I thougt i have seen a command to tell on runtime inside a .hal file
where the encoder is
the ubuntu package manager verifies that installed packages come from a
source you trust. If not, it gives an error like the one you show.
To accept the key we use on our packages, execute these two commands
in a terminal while you have an internet connection available:
gpg --keyserver
On Fri, Jan 30, 2009 at 11:39:27AM -0600, Stuart Stevenson wrote:
Gentlemen,
I read the link. It helped a lot. I am able to use gdb to do
limited debug of the kinematics file. I need to be able to stop the
debug (I think it is disable 'n') and run the control and then restart
the debug to
did you continue after you disabled?
Jeff
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To get a 10kHz square wave, you need to have BASE_PERIOD 5 or lower.
Then simply set up a pwmgen.
Here's a starting point for you. it may require tweaking.
# Create one PWM generator. place this line early in your hal file.
loadrt pwmgen output_type=0
# Do the computations for
If the encoder position in hal generally tracks the correct position but
gets worse over multiple revolutions, I would look to problems outside
the PC. For instance, if the problem is not present when you turn the
spindle by hand, then it could be noise from the spindle motor coupled
into the
There are not presently any CAN-Bus hardware interfaces supported by
emc2 for position control.
The kinds of hardware interfaces that lend themselves to emc2
compatability are described on our wiki:
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Emc2HardwareDesign
I don't know anything about
Consider setting this up so that sensed edge of material counts as a
probe trigger for G38.2 probing moves.
Then, your program could
* place the machine in mdi mode
* do several mdi commands involving G38.2 probe movements
* use the status buffer to determine the machine's position when the
WARNING: hal_ready [/tmp/tmpgODa1T/ddt.ko] undefined!
these messages are because the kernel doesn't know about the symbols
provided by emc. You can safely ignore this warning at compile time;
the true test is whether the component loads.
Jeff
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