On Sun, 2007-10-14 at 18:00 -0700, Kirk Wallace wrote:
Last week I made my first thread on my lathe. It didn't take long to get
good threads, but I wasn't happy with the PID tuning, so I have been
doing battle with that. After some improvement, I tried another thread
and got a pronounced surge
Might be of interest.
Regards,
Alex
- Original Message -
From: D. Kokenge
To: Alex Joni
Sent: Sunday, October 14, 2007 12:00 AM
Subject: G-Code
I recently wrote software to generate G-code from a photo or
line drawings.
It generates code that follows line or photos.
Photos
On Monday 15 October 2007, Alex Joni wrote:
Might be of interest.
Regards,
Alex
- Original Message -
From: D. Kokenge
To: Alex Joni
Sent: Sunday, October 14, 2007 12:00 AM
Subject: G-Code
I recently wrote software to generate G-code from a photo or
line drawings.
It generates code
Kirk Wallace wrote:
I looked briefly at the emc.nml file and didn't see anything obvious,
but I wonder if there is a way to run Halscope on another computer like
you can run the user interface by redirecting emcsvr?
Nope, sorry. HAL is strictly a local thing.
You can of course run
I'm trying to restore a saved HAL file in the terminal window.
following the HAL TUTORIAL Chap 2.3.6
I get the following error after issuing this command:
linux:~$ halcmd -f saved.hal
RAPTI: ERROR: could not open shared memory (error=2)
HAL: ERROR: rtapi init failed
calcmd: hal_init()
Hi,
Does anyone know whether it is possible to run EMC2 in Topolinux within
Windows XP? I'm not bothered about it running slow or not doing anything
'real' but my only computer with linux running on it is in the workshop
and it would be nice to be able to mess about with sims etc. on EMC
On Mon, Oct 15, 2007 at 08:31:03AM -0500, John Thornton wrote:
I'm trying to restore a saved HAL file in the terminal window.
following the HAL TUTORIAL Chap 2.3.6
I get the following error after issuing this command:
linux:~$ halcmd -f saved.hal
RAPTI: ERROR: could not open shared memory
You need to start the realtime subsystem first:
e.g. : sudo /etc/init.d/realtime start
(there might be an easier way to start it, which I'm overlooking now)
Regards,
Alex
- Original Message -
From: John Thornton [EMAIL PROTECTED]
To: emc-users@lists.sourceforge.net
Sent: Monday, October
Hi,
I run it all the time inside a virtual machine.
VMware Server is a free VM machine (running on Win here), in which you can
install emc2 (the Live CD) and it will work without issues.
You can also install a stock Ubuntu, and compile the non-RT simulation
version of emc2 (this should work a
Guys,
Out of curiosity, can an EMC lathe make threads without spindle feedback?
On cnczone.com a guy posted pictures on a thread made with Mach without
spindle feedback, only a VFD as speed controller. They looked truly good.
I know there are problems with it (torque figures, exact positioning,
Stephen Wille Padnos wrote:
It might make sense to have an option without terminals, for those of us
who really can't stand the IDC ones ;) Even if I only save $10 or $20
due to parts cost, I sure save a lot of work and aggravation by not
having to desolder the large connectors.
I can't
On Sun, Oct 14, 2007 at 06:00:46PM -0700, Kirk Wallace wrote:
http://www.wallacecompany.com/cnc_lathe/HNC/emc2/spindle_sync_surge-1b.png
Like Jon says, the axis needs some time to sync up with the spindle.
The lower your acceleration is, the harder this is to do, and the
farther outside the
Kirk Wallace wrote:
On Sun, 2007-10-14 at 22:59 -0500, Jon Elson wrote:
Kirk Wallace wrote:
Is there a way to save Halscope channel settings and reload them later?
It does do that. If you don't have the latest version, it
didn't save every setting, but it did save the channel
assignment.
Kirk Wallace wrote:
After looking at the graph for a while, it came to me that the slope of
the Z0 to Z2 move intersects the vertex of the Z2 to Z0 move and the
G4p0.2 dwell. Shown as line A my revised graph here:
http://www.wallacecompany.com/cnc_lathe/HNC/emc2/spindle_sync_surge-1b.png
Alex Joni wrote:
From: D. Kokenge
To: Alex Joni
Sent: Sunday, October 14, 2007 12:00 AM
Subject: G-Code
I recently wrote software to generate G-code from a photo or
line drawings.
It generates code that follows line or photos.
Photos move the head back and forth up the photo.
Line
Svenne Larsson wrote:
Guys,
Out of curiosity, can an EMC lathe make threads without spindle feedback?
On cnczone.com http://cnczone.com a guy posted pictures on a thread
made with Mach without spindle feedback, only a VFD as speed controller.
They looked truly good.
I know there are
On Mon, Oct 15, 2007 at 10:49:05AM -0500, Jon Elson wrote:
Lines A and B are separated by about 1/3 of a second. If your
spindle speed is roughly 180 RPM, then they are separated by one
turn of the spindle. EMC decides which turn is best to sync to.
See my other message for a
On Mon, Oct 15, 2007 at 05:24:01PM +0200, Svenne Larsson wrote:
Guys,
Out of curiosity, can an EMC lathe make threads without spindle feedback?
On cnczone.com a guy posted pictures on a thread made with Mach without
spindle feedback, only a VFD as speed controller. They looked truly good.
Chris Radek [EMAIL PROTECTED] wrote:
On Mon, Oct 08, 2007 at 07:51:59PM -0600, Sebastian Kuzminsky wrote:
Duty cycles from 0 to about 55% give me increasing whining from the
motor but no movement at all. 55 to 100% gives increasing motor speed
and torque.
I think my linearity is much
Na, that wasn't my purpose so please let Mach stay out of this. :)
Thanks for the replies, I was interested in the theoretical manner.
Regards,
Sven
2007/10/15, Chris Radek [EMAIL PROTECTED]:
On Mon, Oct 15, 2007 at 05:24:01PM +0200, Svenne Larsson wrote:
Guys,
Out of curiosity, can an
I'm playing around with EMC, trying to control a small brushed DC motor.
The parallel port controls an H-bridge circuit which feeds power to
the motor. The motor has a 256-line encoder on the motor shaft, which
I read through the parallel port.
The fastest thread my PC can run reliably is about
Maybe this is a dumb point. Could you not flow solder on the contacts on
the board and let the user choose?
Kyle
Jon Elson wrote:
I can't test it on my bed-of-nails text fixture without
something soldered in those holes. Maybe I should prominently
list the screw-terminal option on my
Actually, there's a better way :) (getting rid of the solder is one of
the pains of replacing those connectors.)
There are hundreds of kinds of pins for bed-o-nails fixtures, including
ones that are meant to toich pins (cup varieties), ones that are meant
to touch bare metal areas like SMT
Sebastian Kuzminsky wrote:
I'm playing around with EMC, trying to control a small brushed DC motor.
The parallel port controls an H-bridge circuit which feeds power to
the motor. The motor has a 256-line encoder on the motor shaft, which
I read through the parallel port.
The fastest thread
John Kasunich [EMAIL PROTECTED] wrote:
Sebastian Kuzminsky wrote:
I've determined that with no load on the motor shaft, stepping the
PWM duty cycle from 0 to 100% causes the motor to accelerate from a
stand-still to the 1200 RPM limit in about 75 us.
Wow.
And wow again.
That is one
Sebastian Kuzminsky wrote:
It's a Pittman 8322, overdriven from 19.1 V to 24 V. The rated
top speed (at 19.1 V) is 7847 rpm, rated peak torque is
7.4 oz*in. There are excellent manufacturer's specs here:
http://pittmannet.com/series8000motors.html
Bummer, I was hoping to do it all in
On Mon, 2007-10-15 at 11:05 -0500, Chris Radek wrote:
On Mon, Oct 15, 2007 at 10:49:05AM -0500, Jon Elson wrote:
Lines A and B are separated by about 1/3 of a second. If your
spindle speed is roughly 180 RPM, then they are separated by one
turn of the spindle. EMC decides which turn
emc's motion controller uses the following HAL pins during the G33
spindle synchronized move and G76 threading canned cycle:
motion.spindle-revs
motion.spindle-index-enable
These must behave like the canonical encoder interface pins 'position'
and 'index-enable', described here:
I don't know what a K word does, but the interpreter allows only one per
block. The interpreter reads the block, storing all of the words in a table,
and then interprets it. The order of words in a block in not generally
relevant. The K word could be first, or last, or anywhere in the block.
Ken
John Kasunich [EMAIL PROTECTED] wrote:
If you limit the speed to 1200 RPM, you will be handicapping the
motor. The power that a motor delivers is the product of speed
and torque. If you cut the top speed from 7847 to 1200 RPM, you
can only get 15.3% of the motor's rated power out of it.
On Mon, 2007-10-15 at 13:18 -0400, Stephen Wille Padnos wrote:
Actually, there's a better way :) (getting rid of the solder is one of
the pains of replacing those connectors.)
There are hundreds of kinds of pins for bed-o-nails fixtures, including
... snip
went to the socketed probe pins.
Sven
Not sure about what was posted as the link is rather generic. Mach3 uses an
index sensor (slotted disc and opto) to get angular orientation and speed.
Could not work with just a VFD as you need to know the angle to start each
pass. But threads are pretty good with the simple opto gate or
It may be useful to refer to the docs, which I believe are up to date
http://linuxcnc.org/docs/devel/html/gcode_main.html#sec:G33,-G33.1:-Spindle-Synchronized
.. but perhaps this conversation can help improve the documentation.
On Mon, Oct 15, 2007 at 11:33:27AM -0700, Kirk Wallace wrote:
- Can
On Mon, Oct 15, 2007 at 11:33:27AM -0700, Kirk Wallace wrote:
- Can a K be applied to each axis? Such as G33 z1.0 k0.050 x0.100
k0.010. I suppose, I could just try it and see what happens.
If I understand what you want, you get it just by specifying a
diagonal move. K is the pitch _along the
Oh good - I'm glad I'm not the only one who has done that ;)
Mesa has some of their I/O boards with terminal header options - the
boards are about $20 more than their ribbon header counterparts, but the
two 24-pin terminal plugs are about $22 *each*. It's less than a
(reasonable quality)
I couldn't tell if option was a lower case l (ell) or an upper case I (eye).
Turns out it
is an upper case i. Perhaps the upper case I (eye) and lower case l (ell) are
poor
choices for options... can't tell them apart on many systems.
Now I can test hal snippets...
If I can be of any help on
Hello everybody, i'm trying to make my own CNC Machine with EMC based as
control, and i dont know how start, i mean what Stepper motor drive
interface i need, or if exist some guide to build one, maybe i'm can build
it, i has see some examples in internet using Darling Transistors, .. i has
read
Kyle wrote:
Maybe this is a dumb point. Could you not flow solder on the contacts on
the board and let the user choose?
Most users would not want to have to suck the solder out of 60
holes and then solder in connectors. I really don't blame them,
either! If you really want to do it this
Sebastian Kuzminsky wrote:
John Kasunich [EMAIL PROTECTED] wrote:
The problem is going to be getting usable velocity feedback. Your
encoder sampling is at 25uS, and your PID is running at 75uS. That
means in any one PID period, you get either 0, 1, 2, or 3 encoder
counts. Not much
Kirk Wallace wrote:
The only reason I put the G4's in was to try attenuate the low
acceleration problem. I wonder if it is worth fixing.
I am getting the impression that the spindle index is what starts the
selected axis movement.
No, I think there has to be more to it than that. If
You might be able to find a crown type large enough to probe either
populated or unpopulated boards. Have you tried targeting the edge of the
hole with a crown type? Unless the fillet is very large that might work.
Javid
- Original Message -
From: Jon Elson [EMAIL PROTECTED]
To:
Jeff Epler wrote:
It may be useful to refer to the docs, which I believe are up to date
http://linuxcnc.org/docs/devel/html/gcode_main.html#sec:G33,-G33.1:-Spindle-Synchronized
.. but perhaps this conversation can help improve the documentation.
On Mon, Oct 15, 2007 at 11:33:27AM -0700, Kirk
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