[Emc-users] Fw: G-Code

[Alex Joni]

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 move the head back and forth up the photo.
> Line drawings create g-code that follows the line. This is
> useful when doing stuff like dovetails etc.
> 
> It's in PHP and uses mySQL.
> 
> If you think there is any interest let me know. - I'll give
> it away free.
> 
> If you want to test it, you can run it at
> www.maytrex.org/cnc/g_string.php
> You can select from the sample photos, and view the g-code.
> Because of the crunching it does, large line drawings can
> take a few minutes to generate - so be patient.
> When it's done a button will show up to view the g-code.
> Using cntrl-c you can copy the g-code and paste it into a
> file if you'd like to run it to see how the g-code works.
> 
> Have a great day...
> Sincerely..
> Dan Kokenge


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Re: [Emc-users] HNC Lathe Spindle Sync Motion

[Kirk Wallace]

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 motion during the threading passes. This
> happened last week, but turned out to be an erratic spindle encoder
> signal. I checked all of my encoders, which seem to be fine. Then I went
> back through some of my "known decent" PID settings and got the same
> surging. The surge appears to be commanded. I have a feeling that the
> increased acceleration times may be a factor. I wonder if synced motion
> should have a ramp or buffer zone to allow it to lock gracefully. I have
> a halscope graph of a spindle synced motion and my best tuning at this
> link:
> 
> http://www.wallacecompany.com/cnc_lathe/HNC/emc2/spindle_sync_surge-1a.png
> 
> and the .ngc file is here:
> 
> http://www.wallacecompany.com/cnc_lathe/HNC/emc2/spin_sync_z-1.ngc
> 
> Any comments are appreciated.
> 

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

Shouldn't the target slope have been line "B"?
-- 
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/ 
Hardinge HNC lathe
Bridgeport mill conversion pending
Zubal lathe conversion pending)


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Re: [Emc-users] Halscope Settings

[Kirk Wallace]

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.  Oh, you want to save it as a file, and reload after 
> making a different setting.  Hmm, there is a back-door way to do 
> it, because these settings are put in a file with the other 
> files in your configs directory.  I think it starts with a ".", 
> so it won't show up unless you do an ls -a command.
> 
> Jon

Thanks Jon.

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?

-- 
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/ 
Hardinge HNC lathe
Bridgeport mill conversion pending
Zubal lathe conversion pending)


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Re: [Emc-users] Halscope Settings

[Kirk Wallace]

On Mon, 2007-10-15 at 03:56 +, ben lipkowitz wrote:
> By default halscope saves a hidden file ".scope.cfg" in the current 
> directory. The next time you run halscope from that directory it loads the 
> settings (well most of them at least) from that file.

This implies that I can save the file to another file name and before
invoking Halscope again - copy the desired file back to ".scope.cfg".
Or, I could create a script that takes the first command argument as the
".scope.cfg" file. Thanks Ben.

-- 
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/ 
Hardinge HNC lathe
Bridgeport mill conversion pending
Zubal lathe conversion pending)


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Re: [Emc-users] Pluto Alternatives

[Stephen Wille Padnos]

Jon Elson wrote:

>Kirk Wallace wrote:
>  
>
>>On Sun, 2007-10-14 at 20:25 -0500, Jon Elson wrote:
>>
>>
>>>Kirk Wallace wrote:
>>>  
>>>
On Sun, 2007-10-14 at 12:50 -0600, Sebastian Kuzminsky wrote:


>Am I the only one who wishes for a Pluto-P with screw-terminals on the
>board instead of a ribbon-cable header?
>  
>
I am with you on this one. I much prefer screw terminals.


>>>Just a s a data point, to convert my universal stepper 
>>>controller or PWM controller from the cheap IDC punch-down 
>>>terminals to 2-part screw terminals costs ME an additional $60
>>>in parts.  Clearly, there are more components in the screw 
>>>terminal variety.
>>>
>>>Jon
>>>  
>>>
>>Now that you mentioned it. I de-soldered the terminals on my UPC and put
>>on screw terminals. But it's funny that I would have a really hard time
>>paying $60 more for a UPC.
>>
>>
>
>Yeah, funny how that works out!  I've made a couple for my own 
>test stations like that, but never sold one with the screw 
>terminals.
>
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.

- Steve

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Re: [Emc-users] Halscope Settings

[Jon Elson]

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.  Oh, you want to save it as a file, and reload after 
making a different setting.  Hmm, there is a back-door way to do 
it, because these settings are put in a file with the other 
files in your configs directory.  I think it starts with a ".", 
so it won't show up unless you do an ls -a command.

Jon

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Re: [Emc-users] Pluto Alternatives

[Jon Elson]

Kirk Wallace wrote:
> On Sun, 2007-10-14 at 20:25 -0500, Jon Elson wrote:
> 
>>Kirk Wallace wrote:
>>
>>>On Sun, 2007-10-14 at 12:50 -0600, Sebastian Kuzminsky wrote:
>>>
Am I the only one who wishes for a Pluto-P with screw-terminals on the
board instead of a ribbon-cable header?
>>>
>>>
>>>I am with you on this one. I much prefer screw terminals.
>>
>>Just a s a data point, to convert my universal stepper 
>>controller or PWM controller from the cheap IDC punch-down 
>>terminals to 2-part screw terminals costs ME an additional $60
>>in parts.  Clearly, there are more components in the screw 
>>terminal variety.
>>
>>Jon
> 
> 
> Now that you mentioned it. I de-soldered the terminals on my UPC and put
> on screw terminals. But it's funny that I would have a really hard time
> paying $60 more for a UPC.

Yeah, funny how that works out!  I've made a couple for my own 
test stations like that, but never sold one with the screw 
terminals.

Jon

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Re: [Emc-users] Halscope Settings

[ben lipkowitz]

By default halscope saves a hidden file ".scope.cfg" in the current 
directory. The next time you run halscope from that directory it loads the 
settings (well most of them at least) from that file.

  On Sun, 14 Oct 2007, Kirk Wallace wrote:

> Is there a way to save Halscope channel settings and reload them later?

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Re: [Emc-users] HNC Lathe Tuning

[Jon Elson]

Kirk Wallace wrote:
> On Sun, 2007-10-14 at 19:42 -0500, Chris Radek wrote:
> 
>>On Sun, Oct 14, 2007 at 05:39:02PM -0700, Kirk Wallace wrote:
>>
>>>In case anyone is interested, I have my latest tuning results at these
>>>links:
>>>
>>>http://www.wallacecompany.com/cnc_lathe/HNC/emc2/pid_x-1b.png
>>>
>>>http://www.wallacecompany.com/cnc_lathe/HNC/emc2/pid_z-1b.png
>>
>>Much better!  You should be able to add some "I" now to get rid of the
>>steady state errors.
>>
>>Chris
> 
> 
> I seem to recall putting in 1.0 for I and got an oscillation. Maybe I
> should try some fractional settings.

A little I, and fractional values are often needed, can help. 
Otherwise, you can turn up (or down) FF1 to bring the 
steady-state error down right to zero.  Then, you can add just a 
tiny bit of FF2 (often something like 0.002) to bring the accel 
spikes down close to zero error, too.  Some of these parameters 
are VERY sensitive.

Jon

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Re: [Emc-users] HNC Lathe Spindle Sync Motion

[Jon Elson]

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 motion during the threading passes. This
> happened last week, but turned out to be an erratic spindle encoder
> signal. I checked all of my encoders, which seem to be fine. Then I went
> back through some of my "known decent" PID settings and got the same
> surging. The surge appears to be commanded. I have a feeling that the
> increased acceleration times may be a factor. I wonder if synced motion
> should have a ramp or buffer zone to allow it to lock gracefully. I have
> a halscope graph of a spindle synced motion and my best tuning at this
> link:
> 
> http://www.wallacecompany.com/cnc_lathe/HNC/emc2/spindle_sync_surge-1a.png
> 
> and the .ngc file is here:
> 
> http://www.wallacecompany.com/cnc_lathe/HNC/emc2/spin_sync_z-1.ngc
Well, there may not be any problem with your code.  You have to 
give it some room to accelerate before the tool hits the 
workpiece.  You also need a lead-out region where the tool can 
be retracted from the work.  I can't tell what your velocities 
are there, but it looks liek it is surging a bit to get in sync 
with the thread.  It HAS to do that.  Depending on exactly where 
the spindle is when everything arrives at the "decision point", 
it either has to race ahead or lag behind and wait for another 
rotation.  Sometimes it lucks into almost perfect sync and a 
tiny correction puts it on the dot, other times it will have to 
accelerate very near to the machine max acceleration spec from 
the ini file to make it.

Your code is a bit odd, anyway, and the EMC2 code may assume a 
non-synced move in Z to some good starting point, and then a
transition to spindle synced motion.  Your code is just doing 
synced motion back and forth.  (That may have nothing to do with 
the surging, anyway.

You can look at http://jelinux.pico-systems.com/codes/thread3.ngc
for a program I have used to demonstrate threading on my 
minimill.  This program should work fine on a lathe, too.
I don't see that it does any sort of unsynced lead-in move, 
either, but it does allow some Z travel before tool begins the 
cut.  it does a 45 degree lead-out with the X axis before 
breaking out of sync, though.  If you don't have the luxury of 
cutting air off the end of the part, then a similar angled 
lead-in could be used.  That way the Z axis is in sync before 
the tool touches.

Jon

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[Emc-users] Halscope Settings

[Kirk Wallace]

Is there a way to save Halscope channel settings and reload them later?
-- 
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/ 
Hardinge HNC lathe
Bridgeport mill conversion pending
Zubal lathe conversion pending)


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Re: [Emc-users] Pluto Alternatives

[Stephen Wille Padnos]

Kirk Wallace wrote:

>On Sun, 2007-10-14 at 20:25 -0500, Jon Elson wrote:
>  
>
>>Kirk Wallace wrote:
>>
>>
>>>On Sun, 2007-10-14 at 12:50 -0600, Sebastian Kuzminsky wrote:
>>>  
>>>
Am I the only one who wishes for a Pluto-P with screw-terminals on the
board instead of a ribbon-cable header?


>>>I am with you on this one. I much prefer screw terminals.
>>>  
>>>
>>Just a s a data point, to convert my universal stepper 
>>controller or PWM controller from the cheap IDC punch-down 
>>terminals to 2-part screw terminals costs ME an additional $60
>>in parts.  Clearly, there are more components in the screw 
>>terminal variety.
>>
>>Jon
>>
>>
>Now that you mentioned it. I de-soldered the terminals on my UPC and put
>on screw terminals. But it's funny that I would have a really hard time
>paying $60 more for a UPC.
>  
>
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) breakout board, but not by all that much.

- Steve


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Re: [Emc-users] Pluto Alternatives

[Kirk Wallace]

On Sun, 2007-10-14 at 20:25 -0500, Jon Elson wrote:
> Kirk Wallace wrote:
> > On Sun, 2007-10-14 at 12:50 -0600, Sebastian Kuzminsky wrote:
> >>
> >>Am I the only one who wishes for a Pluto-P with screw-terminals on the
> >>board instead of a ribbon-cable header?
> > 
> > 
> > I am with you on this one. I much prefer screw terminals.
> 
> Just a s a data point, to convert my universal stepper 
> controller or PWM controller from the cheap IDC punch-down 
> terminals to 2-part screw terminals costs ME an additional $60
> in parts.  Clearly, there are more components in the screw 
> terminal variety.
> 
> Jon

Now that you mentioned it. I de-soldered the terminals on my UPC and put
on screw terminals. But it's funny that I would have a really hard time
paying $60 more for a UPC.
-- 
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/ 
Hardinge HNC lathe
Bridgeport mill conversion pending
Zubal lathe conversion pending)


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Re: [Emc-users] Pluto Alternatives

[Jon Elson]

Kirk Wallace wrote:
> On Sun, 2007-10-14 at 12:50 -0600, Sebastian Kuzminsky wrote:
>>
>>Am I the only one who wishes for a Pluto-P with screw-terminals on the
>>board instead of a ribbon-cable header?
> 
> 
> I am with you on this one. I much prefer screw terminals.

Just a s a data point, to convert my universal stepper 
controller or PWM controller from the cheap IDC punch-down 
terminals to 2-part screw terminals costs ME an additional $60
in parts.  Clearly, there are more components in the screw 
terminal variety.

Jon

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Re: [Emc-users] HNC Lathe Tuning

[Kirk Wallace]

On Sun, 2007-10-14 at 19:42 -0500, Chris Radek wrote:
> On Sun, Oct 14, 2007 at 05:39:02PM -0700, Kirk Wallace wrote:
> > In case anyone is interested, I have my latest tuning results at these
> > links:
> > 
> > http://www.wallacecompany.com/cnc_lathe/HNC/emc2/pid_x-1b.png
> > 
> > http://www.wallacecompany.com/cnc_lathe/HNC/emc2/pid_z-1b.png
> 
> Much better!  You should be able to add some "I" now to get rid of the
> steady state errors.
> 
> Chris

I seem to recall putting in 1.0 for I and got an oscillation. Maybe I
should try some fractional settings.
-- 
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/ 
Hardinge HNC lathe
Bridgeport mill conversion pending
Zubal lathe conversion pending)


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[Emc-users] HNC Lathe Spindle Sync Motion

[Kirk Wallace]

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 motion during the threading passes. This
happened last week, but turned out to be an erratic spindle encoder
signal. I checked all of my encoders, which seem to be fine. Then I went
back through some of my "known decent" PID settings and got the same
surging. The surge appears to be commanded. I have a feeling that the
increased acceleration times may be a factor. I wonder if synced motion
should have a ramp or buffer zone to allow it to lock gracefully. I have
a halscope graph of a spindle synced motion and my best tuning at this
link:

http://www.wallacecompany.com/cnc_lathe/HNC/emc2/spindle_sync_surge-1a.png

and the .ngc file is here:

http://www.wallacecompany.com/cnc_lathe/HNC/emc2/spin_sync_z-1.ngc

Any comments are appreciated.

-- 
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/ 
Hardinge HNC lathe
Bridgeport mill conversion pending
Zubal lathe conversion pending)


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Re: [Emc-users] HNC Lathe Tuning

[Chris Radek]

On Sun, Oct 14, 2007 at 05:39:02PM -0700, Kirk Wallace wrote:
> In case anyone is interested, I have my latest tuning results at these
> links:
> 
> http://www.wallacecompany.com/cnc_lathe/HNC/emc2/pid_x-1b.png
> 
> http://www.wallacecompany.com/cnc_lathe/HNC/emc2/pid_z-1b.png

Much better!  You should be able to add some "I" now to get rid of the
steady state errors.

Chris

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[Emc-users] HNC Lathe Tuning

[Kirk Wallace]

In case anyone is interested, I have my latest tuning results at these
links:

http://www.wallacecompany.com/cnc_lathe/HNC/emc2/pid_x-1b.png

http://www.wallacecompany.com/cnc_lathe/HNC/emc2/pid_z-1b.png


-- 
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/ 
Hardinge HNC lathe
Bridgeport mill conversion pending
Zubal lathe conversion pending)


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Re: [Emc-users] Pluto Alternatives

[Kirk Wallace]

On Sun, 2007-10-14 at 14:55 -0400, Stephen Wille Padnos wrote:
> Hi Kirk.
> 
> Mesa Electronics should be coming out with their 7I43 soon, which will 
> be a reasonable alternative.  It's listed as a USB-connected device, but 
> it will be USB and/or parallel.
... snip
> Of course if you can use a PCI card then a Mesa 5i20 or 5i22 would do 
> just fine also, though at significantly higher cost.
> 
> - Steve

Thanks for the news. I'll check it out.
-- 
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/ 
Hardinge HNC lathe
Bridgeport mill conversion pending
Zubal lathe conversion pending)


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Re: [Emc-users] Pluto Alternatives

[Kirk Wallace]

On Sun, 2007-10-14 at 12:50 -0600, Sebastian Kuzminsky wrote:
> Kirk Wallace <[EMAIL PROTECTED]> wrote:
> > Apparently, Pluto is not available anymore. Are there any alternatives?
> > Are there firmware files available that would allow me to make my own?
> 
> The Pluto-P will apparently be available in December:
> 
> 
> 
> 
> The interfaces supported by EMC are listed here:
> 
> 
> 
> 
> Looks like Pico Systems are the only parallel-port based alternative.

I have a Pico PWM controller on my lathe. I have looked closely at the
5i20 for my mill. But, I like the balance of features and cost on the
Pluto for something I can keep in the lab for experimenting.

> Then there are some PCI-based options, the MesaNet 5i20 comes highly
> recommended but it's quite a bit more expensive at $200.
> 
> 
> Am I the only one who wishes for a Pluto-P with screw-terminals on the
> board instead of a ribbon-cable header?

I am with you on this one. I much prefer screw terminals.
-- 
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/ 
Hardinge HNC lathe
Bridgeport mill conversion pending
Zubal lathe conversion pending)


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Re: [Emc-users] Pluto Alternatives

[Gene Heskett]

On Sunday 14 October 2007, Kirk Wallace wrote:
>Apparently, Pluto is not available anymore. Are there any alternatives?
>Are there firmware files available that would allow me to make my own?
>Thanks.

I take it you are not referring to this link:

Which appears to be a web page monitor of some sort.

Now, this might be closer to what you are looking for:


Thanks to the controversy about whether pluto is a planet or not, that hit is 
36 pages down in the google search.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
<|Rain|> Knghtbrd: let me give you access to the zone files
 oh gods - you do realize I have never played with bind right?
<|Rain|> uhoh :)

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Re: [Emc-users] Pluto Alternatives

[Jeff Epler]

The relationship between the FPGA pins, the parport, and the pin headers
is documented in "pluto_servo.pin" in CVS.  There are some
one-transistor inverters for some of the parport signals.  There's
clock source (40MHz) and voltage regulation (there, you'd be better off
following the datasheet than the existing board layout!).

Here are some notes I wrote on the board:
http://emergent.unpy.net/01165081407

Reportedly the design is 4-layer, presumably the inner two layers are
GND and supply.  Altera's datasheets propose a separate VCC_core and
VCC_io, while the pluto-p board appears to use a 3.3V supply for both.

I question the value of cloning the pluto board, compared to a new board
design with:
* More sensible I/O headers
* More powerful FPGA from current FPGA line
* Correct power supply
* Provision for mounting
In many ways, the upcoming mesanet board that SWP mentioned seems to be
that board.  About the only advantage you'd have with a clone board is
that you would avoid any firmware development time.

Jeff

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Re: [Emc-users] Pluto Alternatives

[ben lipkowitz]

the pluto-p does not look very complicated. you could probably reverse 
engineer one from the docs or with help from another pluto owner. then it 
would be a simple matter of making the circuit board and running emc as 
usual.

  On Sun, 14 Oct 2007, Sebastian Kuzminsky wrote:

> Am I the only one who wishes for a Pluto-P with screw-terminals on the
> board instead of a ribbon-cable header?

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Re: [Emc-users] Pluto Alternatives

[Stephen Wille Padnos]

Hi Kirk.

Mesa Electronics should be coming out with their 7I43 soon, which will 
be a reasonable alternative.  It's listed as a USB-connected device, but 
it will be USB and/or parallel.  Last I knew, Pete was working on 
getting it so you could use USB for power, and parallel for data (or USB 
for data, of course).  The pricing I got (which may not have been final) 
was $89 each in single quantities.  It's got a heck of a lot more gates 
than the pluto (200k or 400k, vs. 50k?), as well as more I/Os (48, on 
two 50-pin connectors like on their PCI cards)..

There won't be an EMC config for it for a little while, but since the 
VHDL/verilog code is quite portable, it's not too difficult to get it to 
work.  It's even easier since Xilinx (the manufacturer of the chip on 
the 7i43) has free native Linux tools, whereas Altera (Pluto chip 
manufacturer) doesn't.

Of course if you can use a PCI card then a Mesa 5i20 or 5i22 would do 
just fine also, though at significantly higher cost.

- Steve

Kirk Wallace wrote:

>Apparently, Pluto is not available anymore. Are there any alternatives?
>Are there firmware files available that would allow me to make my own?
>Thanks.
>

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Re: [Emc-users] Pluto Alternatives

[Sebastian Kuzminsky]

Kirk Wallace <[EMAIL PROTECTED]> wrote:
> Apparently, Pluto is not available anymore. Are there any alternatives?
> Are there firmware files available that would allow me to make my own?

The Pluto-P will apparently be available in December:




The interfaces supported by EMC are listed here:




Looks like Pico Systems are the only parallel-port based alternative.
Then there are some PCI-based options, the MesaNet 5i20 comes highly
recommended but it's quite a bit more expensive at $200.


Am I the only one who wishes for a Pluto-P with screw-terminals on the
board instead of a ribbon-cable header?


-- 
Sebastian Kuzminsky

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[Emc-users] Pluto Alternatives

[Kirk Wallace]

Apparently, Pluto is not available anymore. Are there any alternatives?
Are there firmware files available that would allow me to make my own?
Thanks.

-- 
Kirk Wallace
(Hardinge HNC lathe, California, USA
http://www.wallacecompany.com/machine_shop/ )



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Re: [Emc-users] Emc-users Digest, Vol 18, Issue 31

[John Thornton]

Anders has a good write up on installing a jog wheel with axis selection and 
jog speed selection and description of the HAL changes.

http://www.anderswallin.net/2006/11/jogging-emc2/

John

On 13 Oct 2007 at 14:35, [EMAIL PROTECTED] wrote:

> How would I configure HAL to allow this? I am using a HAL encoder and
> bringing the mpg A and B channels through the I/O board. Is it
> possible to change the axis selection in AXIS using the four position
> switch? I would also need to disable the axis selection from the
> remote switch when the focus is on the main control box.



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