Hi,
Is there anyone using the motenc either 8 channel or 4 channel with
emc 2.2.2?
I'm trying to bring up a system after installing off the Live CD and
cannot establish that the index pulse is getting to the software.
I've tried both halmeter and halscope on the encoder index and
encoder
Go calculate the wavelength and it will become apparent why it is
tough to do. Also you need to worry about
freq stability.
Dave
On Jan 27, 2008, at 12:29 PM, Kirk Wallace wrote:
On Sun, 2008-01-27 at 15:03 -0500, Gene Heskett wrote:
... snip
Interesting John. But the whole idea has
Hi Richard,
Try the comm routine once the communications are proved to be
working everything should fall in place.
HTH
Dave
On Jan 26, 2008, at 12:11 PM, Chris Radek wrote:
On Sat, Jan 26, 2008 at 12:38:42PM -0700, Sebastian Kuzminsky wrote:
From your debug file:
insmod: error
Your local Mobil dealer should have Vactra 2 but you may have to
purchase 5 gal. Shell has a equivalent product but I don't know the
name. Shipping is always a killer on heavy stuff as it may double
the effective price.
Good luck.
HTH
Dave
On Jan 25, 2008, at 5:11 AM, Gene Heskett wrote:
:
On Friday 25 January 2008, Dave Engvall wrote:
Your local Mobil dealer should have Vactra 2 but you may have to
purchase 5 gal. Shell has a equivalent product but I don't know the
name. Shipping is always a killer on heavy stuff as it may double
the effective price.
Good luck.
HTH
Yeah, I
: it might be overkill for
your requirements.)
Nathan
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Dave
Engvall
Sent: 24 January 2008 17:53
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] optical probing
Hi,
I'm certain that by now those
Hi,
I'm certain that by now those of you that take Digital Machinist ,
Winter 2007 have absorbed the article on
optical probing. The concept is a no-brainer but my stumbling block
is linux camera software with the cross-hair.
Does anyone know of a package that will work. I think one wants
The SONY website show some of their scales with coeff of expansion =
steel and apparently others that match who knows what!
MMS a couple of months ago show an approach where there was a shop
made gage that ran alongside the
long work pieces and was probed before each job to determine
) + temp correction. (or am I just
dreaming?)
just a thought.
- Original Message -
From: Dave Engvall [EMAIL PROTECTED]
To: Enhanced Machine Controller (EMC) emc-
[EMAIL PROTECTED]
Sent: Monday, January 21, 2008 02:53 PM
Subject: Re: [Emc-users] more scales
The SONY website
Hi Colin,
Good information here:
http://www.epanorama.net/circuits/semiconductor_relays.html#triacselect
HTH
Dave
On Jan 13, 2008, at 11:41 AM, Jon Elson wrote:
John Kasunich wrote:
Colin MacKenzie wrote:
I have a simple relay board I made using
grayhill solid state relays. These relays
Hi,
It is indeed possible to use linear scales with emc. With backlash
they do not tune as well as encoders on the
ballscrew. If the ballscrews are very tight the performance should be
excellent. Recently there was a proposal by someone on the list
(JMK?) to use encoders on the
The most satisfactory tuning I've gotten on loose ballscrews , i.e.
0.003, is with a 2500 cpr encoder on the end
of the ball screw. In order of increasing ease of tuning,
smoothness, etc. the linear scale was worst, an encoder
on the servo motor shaft was next and the best results were
Hi Jon,
Riston sounds like better stuff and easier to use. I think one gets
sharper etching if the etchant is pumped over the foil.
I guess I'm pretty casual about solvents having worked with benzene
above the permissible limit for several weeks each year. Anytime you
can smell benzene you
Kawartha Pine Ridge District Public School Board
On Tue, 2007-12-25 at 15:42 -0800, Dave Engvall wrote:
If anyone wants to etch a disc I can probably find an 30 mL or so of
KPR.
For best resolution make a 4X image and then photoreduce 4X on to
film and use that to expose the
KPR. It makes
Hi Juanjo,
Once you get into a machine with servos, limit switches and a
servo'ed spindle the size of the machine doesn't make much difference.
Hopefully, your servo amps expect plus and minus 10 V as a drive signal.
I don't have specifics but there are people running large machines on
emc2.
This may get you started:
http://www.acu-rite.com/index.cfm?PageID=56ABA3A7-F620-11D4-
BC6400A0CC271CB6
From there you can get the details on which scale you have.
Good luck.
Dave
On Dec 15, 2007, at 5:16 PM, Chris Morley wrote:
Some acu-rite scales have index pulses,some have the wire
Hi Emory,
Check out this page in the emc wiki.
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Stepper_Formulas
I'm a servo person so I know almost nothing about steppers.
Posting the make and model of the steppers and your drives will go a
long ways toward someone
providing the help you are
to make it clear I am not criticizing him, and say this
in a humorous spirit, but Dave Engvall has surely tested my PPMC
hardware to the max, and beyond. Through that, I discovered
some places the grounding on my boards was not sufficient. I
think that has made the later versions more robust
On Dec 6, 2007, at 6:56 PM, Jon Elson wrote:
Kirk Wallace wrote:
I got the first pass on my Bridgeport X axis working and I am having
trouble with tuning. I am using a brushed DC motor with a 3:1 belt
ratio
between the motor and ballscrew. The motor is driven by a Pico PWM
amp
and
Hi all,
In 1975 I installed a mil surplus diesel in a 3/4 T pickup. Ended up
putting about 5000 hrs on that rig.
Never did anything heavier than 27,000 GVW ... (with 55 hp at the
flywheel) ... big grunt.
Injection pumps, especially the inline ones are very reliable. If I
were to fool with
On Nov 28, 2007, at 7:42 AM, Marc van Doornik wrote:
Right. It seems I have got it, now. Feel a bit Kelly Bundy-ish right
now, but I've finally realized my mistake. All the while, I've been
treating the linear motors as if they were stepping motors with a
large
pole period (2.4, by the
Hi Matt,
I, J and K are not modal as far as I can tell. I get bitten by this
one every-once-in-awhile.
Dave
On Nov 27, 2007, at 10:58 AM, Matthew Glenn Shaver wrote:
The interpreter manual says that, in a center format arc move (G2 or
G3), only one offset word (I, J, or K, whichever are
I wasn't quite wordy enough.
A proper
G3(2) XnnnYnnnInnnJnnn
G3XnnnYnnn
will get you a missing I,J,K error message
D
On Nov 27, 2007, at 11:27 AM, Dave Engvall wrote:
Hi Matt,
I, J and K are not modal as far as I can tell. I get bitten by this
one every-once-in-awhile.
Dave
On Nov 27
Hi all,
On Nov 27, 2007, at 4:39 PM, Matthew Glenn Shaver wrote:
On Tue, 2007-11-27 at 13:28 -0800, Kirk Wallace wrote:
I believe you don't need the J. All you need are two points on the
circle and a line known to contain the center. Take the two points
and
draw a line through them. Draw
I get a 404 when I try http://suburb.semo.net/jthornton/face.py. Beer
page work fine.
D
On Nov 26, 2007, at 7:36 AM, Gene Heskett wrote:
On Monday 26 November 2007, John Thornton wrote:
I have the first of a series of G Code generators for EMC up on my
web site.
Hi Ray et al.
For any kind of production I would think we also need coolant
going ... and some shielding to keep the coolant in bounds.
Also a fixture.
Dave
On Nov 18, 2007, at 8:20 AM, [EMAIL PROTECTED] wrote:
Hi Stuart.
This is what I know by way of answers to your questions.
On
The coolant tank is tucked back under the machine; I don't think
anyone has ever looked at it or tested the pump.
Capacity is on the order of 100 L.
On Nov 18, 2007, at 1:34 PM, Jon Elson wrote:
Dave Engvall wrote:
Hi Ray et al.
For any kind of production I would think we also need
Well, that is good news; just pump it dry and start over with low
mineral water.
Most of the well water in this area is pretty hard so I try to use
snow melt for coolant.
D
On Nov 18, 2007, at 7:34 PM, John Kasunich wrote:
Dave Engvall wrote:
The coolant tank is tucked back under
tank is tucked back under the machine; I don't think
anyone has ever looked at it or tested the pump.
Capacity is on the order of 100 L.
On Nov 18, 2007, at 1:34 PM, Jon Elson wrote:
Dave Engvall wrote:
Hi Ray et al.
For any kind of production I would think we also need coolant
going
Jon et al.
Well put! I've been running emc since you had to patch the kernel
(0.9 patch , its been so long I can't remember) to get emc to run.
Somewhat before the BDI's.
I've never had a well checked out controller take off on me.
Anytime I've had a problem I had done something stupid and
Jon, Rafael, et al
IIRC CAN is 1 Mbit/sec.
Philosophically I'd opt for KISS. (keep it simple stupid).
No more complexity than is necessary to get the job done.
To me that sounds a lot like raw packets point to point.
Dave
On Oct 29, 2007, at 10:33 AM, Jon Elson wrote:
Rafael Skodlar wrote:
Hi Jim,
This machine should make a fine conversion to emc.
Relevant material is on the emc wiki.
Just go to the 'Page Index' and look at the different listings under
Mazak.
also: http://webpages.charter.net/bengvall/emc/emcconversion.html
Your most difficult problem may be to decide what
Hi John,
Just a comment on linear glass scales.
Acu-rite does make the ENC250 series in the lengths up to 6 m. with a
resolution of 5 um. Really on the edge if you want to control to
0.0005. Using a 2.5 um resolution scale would be better.
No idea of price but the SENC150 series goes for
Hi all,
Step one is now done; the pulsecoder is connected to channel 03
encoder on the stg board and it works.
400 counts /rev. This would scale nicely to 0.100/rev.
I have a nice front panel switch for X, Y, Z ,B. If I use B as a not
enable then the other positions select axis and
enable at
in manual for milling.
Dave Engvall [EMAIL PROTECTED] wrote:
Hi all,
Step one is now done; the pulsecoder is connected to channel 03
encoder on the stg board and it works.
400 counts /rev. This would scale nicely to 0.100/rev.
I have a nice front panel switch for X, Y, Z ,B. If I use B
The Mac mini's are very tempting. Duo 2 core. 1.8 GHz . Runs OSX
( BSD unix ) with an Apple replacement of X on top.
AFIK X the proper compile of X runs just fine. The only problem is
the lack of EMC compatible I/O. The mini's have USB, Ethernet, and
Firewire. The really nice thing is the
Hi Ben,
Thanks for the ideas, option 3 makes the most sense to me and I guess
the best approach is to rig up a couple of servo motors and start
experimenting.
Dave
On Aug 24, 2007, at 3:38 AM, ben lipkowitz wrote:
Dave Engvall wrote:
Think long arm sewing machine for quilting
Hi all,
I have an application that needs (eventually) 4 axes.
Two are X and Y and the other pair need to track (rotationally) with
in a few degrees or better.
Rotational speeds are from zero to 1800 rpm for one axis and either
1:1 or 2:1 for the other.
The speed of rotation and the
Hi Gene,
Paraffin oil aka lamp oil is pretty close to EDM dielectric. Using
70 -90 V for your DC supply and something on the order of 10 uf
with a resistor in the 20-50 ohm range should get you an RC circuit
that will be close. A bit if component substitution will get you to
an acceptable
Hi Greg, et al
Ah! Now the intermediate point make sense.
As for an alarm with G28... I wouldn't know. I can comment that with
G54 and G53 co-incident a G53Z0 does not cause an error when tool
length offset is active. Because of this I've gotten in the habit of
raising the spindle and then
Hi Jon,
Those are hot chips... don't know how many resolvers there are out
that will handle the reference freq tho ... but not many apps will
push the rps spec. ;-)
http://www.analog.com/en/subCat/0,2879,760%5F791%5F0%5F%5F0%5F,00.html
Dave
On Aug 3, 2007, at 9:03 PM, Jon Elson wrote:
Hi Al,
I suppose there are really two answers to this question. (a). write
the g-code yourself, tedious but gives you exactly what you want or:
(b) use a cam program that generates arcs with cutter comp.
Your question gives me a nice lead-in to bring up a small problem
within emc. Cutter
Steve,
I think Ray H. or Matt S. would fit that bill and also bring a
historical viewpoint to the board. It may depend on how much arm
twisting it takes. ;-)
Dave
On Jul 24, 2007, at 4:25 PM, Steve Stallings wrote:
I would like to see an experienced industrial machine tool
retrofitter or
Hi Bill,
Synergy ( webersys.com) or google for 'synergy cad' should get you to
the site for a cad/cam package that runs on either Windoze or linux.
If you can do with 2.5D cad then the package is free. It is
upgradable in steps eg. 2.5D cam, wireframe and finally parasolids.
Without
Hi Kirk,
Weber Systems is back on line this morning; both phones and internet.
Have fun!
Dave
On Jun 22, 2007, at 11:06 AM, Kirk Wallace wrote:
Does anyone know if Synergy is still an active product? I am trying to
get up back up to speed with it. I tried to bring up the Weber Systems
copy from .ini
MAX_VELOCITY = 1.5
MAX_ACCELERATION = 1.5
STEPGEN_MAXVEL = 1.7
STEPGEN_MAXACCEL = 1.7
BACKLASH = 0.
end copy
OK so max velo is 90 ipm seems pretty hot for steppers but I'm not a
stepper person.
On the other hand the accel at 1.5 seems pretty
Hi all,
IIUC then you want to be able to halt a program and start again
someplace except the first line.
So: Under tkemc ...
bring up the program in the editor.
place the cursor at the first of the line you want to start on...
move the mouse to the restart button at the bottom of the edit
Hi Gene,
In short tool comp works like a charm but the toughest part for me
has always been getting into it.
I think the approach needs to bend a bit; even a thou will do so that
you are cutting an outside corner
in entry. Try starting about a tool dia away from your part. Like you
said,
If you put any filtering in the way of caps on the supply you are
going to get about 1.41 times the AC voltage...
I'm in a similar situation: years ago I bid (on ebay) for some servo
motors that turned out to be steppers.
German made, 4 nm. 205 V and pretty good frequency response ... oh
Hi Chris, others.
Really tool length is just part of the problem. A tool number is
associated with both a tool length and
a tool diameter which may or may not be nominal.
So far I just grit my teeth and work thru the process. I have
considered (briefly) a procedure to normalize
the measured
to the laser setups that measure both length
and diameter. Gaging
the diameter is going to be the most difficult.
After that as someone on this list once said: it is simply a matter
of software.
Dave
On Apr 29, 2007, at 8:35 AM, Chris Radek wrote:
On Sun, Apr 29, 2007 at 08:27:00AM -0700, Dave
option.
Dave
On Apr 29, 2007, at 8:44 AM, Dave Engvall wrote:
Hi Chris,
You are quite correct in assuming I have a series of tool holders;
however I do a lot of one-off stuff
in which the tooling outruns the number of tool holders I have.
With the right probe and program we ought to be able
http://www.isd.mel.nist.gov/personnel/kramer/pubs/RS274NGC_3.web/
RS274NGC_33a.html
describes G38.2 use etc.
see: 3.5.9 Straight Probe - G38.2
3.5.9.1 The Straight Probe Command
and 3.5.9.2
http://www.linuxcnc.org/docs/html/config/emc2hal/emc2hal.html
motion.probe-input IN bit
G38.2 uses
Hi Gene,
IIRC emc2 has a very nice probing routine that will do what you want
and log the results.
The problem, of course, is a decent probe. I would recommend trying
to make a Renishaw type probe ... ie. 3 points in a triangle
where the probe can lift off (disconnect) any single node to
True unobtanium! Done on the Mazak V5 with well used cutters.
Material is 8620 and will eventually be hardened and nitrided.
Naturally running under EMC. Still at 2.0 ... need to upgrade.
I finally have cat5 to the shop but not connected yet.
and will provide good
backing for the nidride.
Dave
- Original Message -
From: Dave Engvall [EMAIL PROTECTED]
To: Enhanced Machine Controller (EMC) emc-
[EMAIL PROTECTED]
Sent: Saturday, April 14, 2007 5:06 PM
Subject: Re: [Emc-users] Show us your pics of unobtanium!
True unobtanium
Using TkEmc -- scripts --- set coordinates will give you a popup
that allows you set set g54 -- g59.3.
You can use the teach mode or edit the numbers directly. All axes are
independent so you can set one , then move and set the next, etc
and finally write the results and exit. Ray can tell
Hi Karen,
There is some interest in this kind of functionality within emc. It
would be handy for either sinker or wire edm at the least and you
apparently have thought of another use.
If one can program in Tk/Tcl then modifying tkemc to provide this
kind of movement should not be too
www.linuxjournal.com/article/8831
Use the cdrecord -scanbus to find out where your cd recorder is.
After that it is pretty easy.
As for the DOS partition I suspect you 'get' to manually partition
during the ubuntu install.
Good Luck.
Dave
On Jan 1, 2007, at 9:21 PM, Hugh Currin wrote:
On Dec 16, 2006, at 9:40 AM, John Prentice wrote:
Anders, greetings
Some comments from a personal point of view - others will differ!
Ditto!
There are probably as many ways of doing e-stop as there are
machines. ;-)
From my viewpoint. 24 V for estop is good (reliable).
The entire estop
Indeed, those numbers and magnifying glass are really handy. Spent
more time than I would care to admit fighting a serial connector over
just that issue. :-(
Dave
On Nov 26, 2006, at 7:35 PM, Chris Radek wrote:
On Sun, Nov 26, 2006 at 06:29:36PM -0500, Jerry Mitchell wrote:
Jeff, Chris,
See: http://www.cnc-workshop.com/
On Nov 22, 2006, at 8:03 AM, RogerN wrote:
- Original Message -
From: Jon Elson [EMAIL PROTECTED]
To: Enhanced Machine Controller (EMC) emc-
[EMAIL PROTECTED]
Sent: Tuesday, November 21, 2006 8:37 PM
Subject: Re: [Emc-users] Questions from
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