On Sat, 20 Mar 2010, cogoman wrote:
> Date: Sat, 20 Mar 2010 16:02:39 -0400
> From: cogoman
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] G52 and Fanuc conversion to EMC
>
> That price seems overkill to me too. I have bee
There is a CAM program out there called EZCAM(
http://www.ezcam.com/web/index.htm#) I tried to use the EZCAM Express
Turn software (about $1000) and after about 8 hours of banging my head
against a wall I gave up.
The manual and documentation is terrible. I have worked with some
really
John Guenther wrote:
> Debug file information:
> Can not find -sec EMC -var NML_FILE -num 1
> Traceback (most recent call last):
> File "/usr/bin/touchy", line 58, in
> from touchy import emc_interface
> File "/usr/bin/touchy.py", line 58, in
> from touchy import emc_interface
> Impo
Paul Keeton wrote:
> As I stated earlier -
>
> The mill currently has encoders on the motors. The issue is getting
> the Fanuc drives existing on the machine at this time to work with EMC. The
> drive requires an analog reference command signal. The drive also requires
> an analog tach
I had BobCad and it truly sucks.
It was a complete waste of money for us.
They sold it to us "twice" promising that it would just take a few small
edits to the G-code translator to get it to work with Isel machines.
After 4 months they still could not translate to Isel and Bobcad was
worthless af
On Sat, 20 Mar 2010, Jon Elson wrote:
> Date: Sat, 20 Mar 2010 21:54:58 -0500
> From: Jon Elson
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] G52 and Fanuc conversion to EMC
>
> Chris Radek wrote:
>> On Sat, Mar 20, 2
Stephen Wille Padnos wrote:
>
> Incidentally, you could make something that does a more direct
> conversion to analog, but it's still iffy as to whether it would work
> well. Just use a simple circuit to do quadrature edge detection, and
> have that trigger a short duration one-shot. The one-s
Chris Radek wrote:
> On Sat, Mar 20, 2010 at 03:57:02PM -0500, Jon Elson wrote:
>
>
>> If you look further, I think you will find there is NO tachometer in the
>> machine. The Fanuc controls synthesize this from the encoder signals.
>>
>
> The mesa hostmot2 driver has a good encoder veloc
Jim Register wrote:
> Rather than adding separate encoders, you might consider adding separate
> tachs as Jon Elson did. See the third photo down at this link:
>
> http://pico-systems.com/CNCconv.html
>
> I would look at someplace like Surplus Center for some small DC motors
> that could be used
As an update to this issue here is the entire EMC errors log from
attempting to run EMC2.4 with touchy as the user interface.
Print file information:
RUN_IN_PLACE=no
EMC2_DIR=
EMC2_BIN_DIR=/usr/bin
EMC2_TCL_DIR=/usr/share/emc/tcl
EMC2_SCRIPT_DIR=
EMC2_RTLIB_DIR=/usr/realtime-2.6.24-16-rtai/modules
Where would I find that? I did not install the sim updates, should I.
On Sat, 2010-03-20 at 19:02 -0600, Sebastian Kuzminsky wrote:
> John Guenther wrote:
> > Ok. too early to tell if any bug reports are necessary however I cannot
> > get 2.4 to start with touchy selected for the display interfa
Andy Pugh wrote:
> On 21 March 2010 01:47, Sebastian Kuzminsky wrote:
>
>
>> There's also this document:
>> http://www.linuxcnc.org/docs/devel/html/drivers_hostmot2.html
>>
>
> There is no mention of any Digital-to-Analog there. I have seen
> references to DAC outputs on the 5I20 in HAL fi
On 21 March 2010 01:47, Sebastian Kuzminsky wrote:
> There's also this document:
> http://www.linuxcnc.org/docs/devel/html/drivers_hostmot2.html
There is no mention of any Digital-to-Analog there. I have seen
references to DAC outputs on the 5I20 in HAL files elsewhere but that
seems to be using
On Saturday 20 March 2010, Dave wrote:
>On 3/20/2010 2:12 PM, Gene Heskett wrote:
>> On Saturday 20 March 2010, Paul Keeton wrote:
>>> Gene,
>>>
>>> Do you (or anyone else) see any any issue with using a
>>> separate encoder and leaving the tach on the motor alone? I have seen
>>> this
Paul Keeton wrote:
>> I didn't know that hostmot2 could output velocity, that is pretty
>> slick.That would certainly be a low cost solution and that should be
>> very reliable.
>>
>
> I didn't know that either. Where can I find info on it?
>
The hostmot2 manpage is a comprehensive re
> Tachs are not without their own problems. Brushes, noise, belts,
> couplings, etc.
Right, the less to go wrong the better!
> I didn't know that hostmot2 could output velocity, that is pretty
> slick.That would certainly be a low cost solution and that should be
> very reliable.
I didn't
John Guenther wrote:
> Ok. too early to tell if any bug reports are necessary however I cannot
> get 2.4 to start with touchy selected for the display interface.
> Initially I was having a problem with the original configurations
> causing an RTAI error which went away when I generated a new
> conf
Ok. too early to tell if any bug reports are necessary however I cannot
get 2.4 to start with touchy selected for the display interface.
Initially I was having a problem with the original configurations
causing an RTAI error which went away when I generated a new
configuration from scratch using st
<
For basic 2D stuff I usually use CamBam (
http://tinyurl.com/ye6l9mt )
Its a windows program but will run under wine and the betas
are free. Works fine for my basic needs..
Ian
___
Ian W. Wright
Sheffield UK
-
I was able to get a copy of Dolphin Partmaster Pro through their Hobby link on
their website. I paid less than retail and will be running the software on a
Win7 x64 platform networked to my EMC2 platform in the shop. Just putting the
pieces together now. Anyone that is interested in Dolphin shou
I wouldn't waste my time adding tachs on an existing system.
Tachs are not without their own problems. Brushes, noise, belts,
couplings, etc.
Tachs were used because there was no way to determine velocity off of a
position resolver way back when.
No one is installing tachs these days. The st
for the record,
here link to cnczone post on the converter boards
http://cnczone.com/forums/showthread.php?t=97875
or link to his website
http://www.semis.hit.bg/
robert
--
Download Intel® Parallel Studio Eval
Try the
On Sat, 2010-03-20 at 16:55 -0600, Sebastian Kuzminsky wrote:
> Karl Schmidt wrote:
> > What are people using to generate tool paths?
> >
> > I dug into this a few years back and put my notes here:
> >
> > http://wiki.xtronics.com/index.php/CAD_CAM#Linux_friendly_CAD_CAM_packages
> >
> > I've not f
Hi dave
this the same on our Fanuc mills all with Yellow caps
we have had a quick look into this,
we will be looking into converter cards, seeing if they are upto the job
can keep up with the rapids
provide a smooth analog signal out at rapids and slow speeds
also how well they compare to price on
Karl Schmidt wrote:
> What are people using to generate tool paths?
>
> I dug into this a few years back and put my notes here:
>
> http://wiki.xtronics.com/index.php/CAD_CAM#Linux_friendly_CAD_CAM_packages
>
> I've not found usable Open-source software - so I'm looking for something
> affordable
The company I work for uses both. Our preferred package is Synergy. We use
it on our big production machine programs. A couple of the guys still use
BobCad at the machines for quick edits and tooling and fixture jobs. Type in
Weber Systems in the search engine and think you can get a 30 day tria
> PWM is unlikely to be able to generate voltages that are stable enough
> for a servo drive. To increase smoothness of the PWM, you need to
> either use a faster PWM base frequency or use a larger RC filter. Using
> a fast PWM makes the resolution lower (for a given processor/crystal),
> an
What are people using to generate tool paths?
I dug into this a few years back and put my notes here:
http://wiki.xtronics.com/index.php/CAD_CAM#Linux_friendly_CAD_CAM_packages
I've not found usable Open-source software - so I'm looking for something
affordable that works.
Can anyone compare b
I agree with you Chris. The drive can be setup for either a 3v/1000 or
7v/1000 tach signal. This might be the simplest way to to do it. Servotek
makes really good tachs, May be just what I need.
Dave
- Original Message -
From: "Chris Radek"
To: "Enhanced Machine Controller (EMC)"
Sen
Correction - The mill currently has encoders on the motors only.
Dave
- Original Message -
From: "Paul Keeton"
To: "Enhanced Machine Controller (EMC)"
Sent: Saturday, March 20, 2010 6:03 PM
Subject: Re: [Emc-users] G52 and Fanuc conversion to EMC
> As I stated earlier -
>
> T
As I stated earlier -
The mill currently has encoders on the motors. The issue is getting
the Fanuc drives existing on the machine at this time to work with EMC. The
drive requires an analog reference command signal. The drive also requires
an analog tach signal to operate correctly. I
Thanks Stuart, I work on these systems everyday and we do extremely close
tolerance work. I rarely have issues with this type of setup myself.
Dave
- Original Message -
From: "Stuart Stevenson"
To: "Enhanced Machine Controller (EMC)"
Sent: Saturday, March 20, 2010 5:29 PM
Subject: Re:
This machine was built by the OEM with a 2 to 1 gear box on each axis. I
believe you would have a hard time moving this much mass around without gear
reduction (and not blowing up motors) at 300 IPM without them. Planetary
gear boxes have very little backlash if any.
- Original Message ---
cogoman wrote:
> That price seems overkill to me too. I have been thinking about
> trying to develop a product for just this kind of situation. The
> solution seems simple, and inexpensive. Take an AVR microcontroller and
> have it monitor the Q-encoder signals. The program would start out
Paul Keeton wrote:
> Dave you are correct, That was what I said. In one email I kicked around the
> idea of removing the encoders from the motors and installing OEM tachs and
> the installing scales or separate encoders on the machine mechanics to track
> position. The US digital box seems like
On Sat, Mar 20, 2010 at 02:07:14PM -0400, Paul Keeton wrote:
> Gene,
>
> Do you (or anyone else) see any any issue with using a separate
> encoder and leaving the tach on the motor alone?
WAIT - what exactly do you have?
Some people are assuming you have tachs, some assume you don
Gentlemen,
I have both tachs and encoders on the cinci servos. The tachs feed the
amps. The encoders feed EMC2. Works flawless.
I have both resolvers and encoders on the G&L servos. Two of the four axes
have scales also. The resolvers feed the amps. The encoders and the scales
feed EMC2. As of
Paul Keeton wrote:
> Gene,
>
> Do you (or anyone else) see any any issue with using a separate
> encoder and leaving the tach on the motor alone?
If you DO have a tach on the motor, then you are golden!
> I have seen this done on
> other servo systems with great reliability. Normally
Gene Heskett wrote:
>
> With all due respect, trying to make an analog voltage level out of an
> encoder, be it a quadrature or a pulse per increment device, the time lag
> involved in converting the output pulse train into a smooth analog signal,
> and making it work, is a good recipe to waste
On Sat, Mar 20, 2010 at 03:57:02PM -0500, Jon Elson wrote:
> If you look further, I think you will find there is NO tachometer in the
> machine. The Fanuc controls synthesize this from the encoder signals.
The mesa hostmot2 driver has a good encoder velocity output that
considers the time stamp
Paul Keeton wrote:
> So is there a converter that anyone is aware of or a method in emc that
> would allow you to take quadrature encoder signals and convert them into an
> analog tach signal?
Some guy from Bulgaria, I think, was advertising this on CNCzone, but I
cannot find the message or a li
cogoman wrote:
>That price seems overkill to me too. I have been thinking about
> trying to develop a product for just this kind of situation. The
> solution seems simple, and inexpensive. Take an AVR microcontroller and
> have it monitor the Q-encoder signals. The program would start out
>
Stephen Wille Padnos wrote:
>
> Encoders on the screws should be OK if there's no backlash between the
> motor and the screw. It's a good rule of thumb to consider that every
> step the encoder is moved away from the motor makes PID tuning harder.
>
I do this on my Bridgeport, and have had no
Paul Keeton wrote:
> The only pit fall is the Tach signal being fed to the drive from the
> original control. I don't think it is a big deal though, I read on CNCZone
> that someone just routed the tach feedback straight to the drive instead of
> the control first. From what I see there is no re
Paul Keeton wrote:
> Thanks Robert,
>
>Do you know if anyone might have used the old Fanuc
> drives? If I could reuse mine it could save a big bundle!
>
>
The problem with a Fanuc retrofit is that they generally provided
synthesized tachometer signals from the control. The
Thanks Jim, I am also considering this option.
Dave
- Original Message -
From: "Jim Register"
To: "Enhanced Machine Controller (EMC)"
Sent: Saturday, March 20, 2010 4:29 PM
Subject: Re: [Emc-users] G52 and Fanuc conversion to EMC
> Paul Keeton wrote:
>> Dave you are correct, That was
Wether it would work or not I couldn't tell you. But I should say this -
The Fanuc drives I have experience with would not tolerate ANY
delays. If the motor makes even the slightest move without response from a
tach signal the drive will throw a TG alarm (Tacho Generator Failure). Keep
Paul Keeton wrote:
> Dave you are correct, That was what I said. In one email I kicked around the
> idea of removing the encoders from the motors and installing OEM tachs and
> the installing scales or separate encoders on the machine mechanics to track
> position. The US digital box seems like
That price seems overkill to me too. I have been thinking about
trying to develop a product for just this kind of situation. The
solution seems simple, and inexpensive. Take an AVR microcontroller and
have it monitor the Q-encoder signals. The program would start out
counting the time bet
Dave you are correct, That was what I said. In one email I kicked around the
idea of removing the encoders from the motors and installing OEM tachs and
the installing scales or separate encoders on the machine mechanics to track
position. The US digital box seems like the way to go but I am stil
Them typos will get you every time! We have had some operators put the
decimal in the wrong spot on a tool offset and really do some damage. Them
decimal points get very expensive! It happens to the best. Live and learn.
Dave
- Original Message -
From: "Gene Heskett"
To: "Enhanced Mac
On 3/20/2010 2:12 PM, Gene Heskett wrote:
> On Saturday 20 March 2010, Paul Keeton wrote:
>
>> Gene,
>>
>> Do you (or anyone else) see any any issue with using a separate
>> encoder and leaving the tach on the motor alone? I have seen this done on
>> other servo systems with great r
Perhaps I didn't understand.
I thought you mentioned that you already have encoders on the motors and
that the existing GE controls derrived a velocity signal from that board
and fed that back to the existing servo amps?
If that is the case, you really only need one encoder to track the
motors
On Saturday 20 March 2010, Paul Keeton wrote:
>Luckily its not my money! Do you think that would work?
>
>Dave
>
Speak up the rest of you, this is beyond my experience.
>- Original Message -
>From: "Gene Heskett"
>To: "Enhanced Machine Controller (EMC)"
>Sent: Saturday, March 20, 2010 1
On Saturday 20 March 2010, Paul Keeton wrote:
>Gene,
>
>Do you (or anyone else) see any any issue with using a separate
>encoder and leaving the tach on the motor alone? I have seen this done on
>other servo systems with great reliability. Normally backlash is not an
>issue unless it is
I'd do it.
That US digital device updates at 7 khz and suspect your old drives will
be fine with the update rate that quick.
$195 per channel is not out of line for a commercial machine.
I just speced out a new BEI encoder for a custom machine and it was just
over $600 and that didn't include
Thanks for the reply Ray. This is a very large machine with very large
drives and motors. The travel limits are 120" in X, 58" in Y and 24 in Z. It
has (3) 20 HP spindles on 24 inch centers. High quality servo replacements
for this machine are quite expensive due to the torque requirements. Arou
Yes and there are others that build similar devices. There are some
limitations to the quality of the dc signal that depends upon the
quality of the converter and the way that it handles both rapid and very
slow motions.
We had this issue with the Mazak we converted as a group during
CNC-Works
Luckily its not my money! Do you think that would work?
Dave
- Original Message -
From: "Gene Heskett"
To: "Enhanced Machine Controller (EMC)"
Sent: Saturday, March 20, 2010 1:53 PM
Subject: Re: [Emc-users] G52 and Fanuc conversion to EMC
> On Saturday 20 March 2010, Paul Keeton wro
Gene,
Do you (or anyone else) see any any issue with using a separate
encoder and leaving the tach on the motor alone? I have seen this done on
other servo systems with great reliability. Normally backlash is not an
issue unless it is an excessive amount on those systems. You simply
On Saturday 20 March 2010, Paul Keeton wrote:
>Stephen,
>
> I think I have located the answer for keeping the encoders on
>the motors. Follow this link:
>
>http://www.usdigital.com/products/etach2/
>
> Please tell me what you think.
>
>Dave
>
Wyy out of my price range
On Saturday 20 March 2010, Paul Keeton wrote:
>So is there a converter that anyone is aware of or a method in emc that
>would allow you to take quadrature encoder signals and convert them into an
>analog tach signal? I have other Fanuc systems in the shop that use tach
>feed back on the motor and L
Stephen,
I think I have located the answer for keeping the encoders on
the motors. Follow this link:
http://www.usdigital.com/products/etach2/
Please tell me what you think.
Dave
- Original Message -
From: "Paul Keeton"
To: "Enhanced Machine Controller (
So is there a converter that anyone is aware of or a method in emc that
would allow you to take quadrature encoder signals and convert them into an
analog tach signal? I have other Fanuc systems in the shop that use tach
feed back on the motor and Linear Scales on the axis with no issues. Drive
Paul Keeton wrote:
>> If there's a tach on the motor, then you should be able to route that
>> directly to the drive. My understanding is that some controls would
>> synthesize the tach feedback from encoder feedback. If you have one of
>> those, then it gets more complex (and I don't know the an
> If there's a tach on the motor, then you should be able to route that
> directly to the drive. My understanding is that some controls would
> synthesize the tach feedback from encoder feedback. If you have one of
> those, then it gets more complex (and I don't know the answer)
I would think th
Paul Keeton wrote:
> Never mind on the Fanuc Motor and drive refit. I went through the Fanuc DC
> Servo Unit Manual and found the info I was looking for
>
> 1. I have the pinout and startup sequence for the connectors and
> drive.
>
> 2. The drive accepts analog VCMD signals
Never mind on the Fanuc Motor and drive refit. I went through the Fanuc DC
Servo Unit Manual and found the info I was looking for
1. I have the pinout and startup sequence for the connectors and
drive.
2. The drive accepts analog VCMD signals.
The only pit fall is the Tac
Thanks Robert,
Do you know if anyone might have used the old Fanuc
drives? If I could reuse mine it could save a big bundle!
Dave
- Original Message -
From: "robert"
To: "Enhanced Machine Controller (EMC)"
Sent: Saturday, March 20, 2010 10:00 AM
Subject: Re: [Emc-u
hi dave
the yet to be reelased V 2.4.x has a G10 update which lets you do a
incremental shift from a defind point, which works just the same as G52
does. this should do what you need todo.
see here
http://linuxcnc.org/docs/2.4/html/gcode_main.html#sec:G10-L20
as i do alot of programing on shee
Hi Chris
I use Linisteppers and have posted a couple videos of my initials tests on
Youtube.
I have a sherline mill with 2A steppers, so I changed the current limit
resistor on the boards to support 2A.
I used old CPU heatsinks and a fan on each board to keep them cool but also
the voltage you want
A couple of questions -
1. Does anyone know when G52 will be available for EMC?
2. I will be converting a large 3 spindle profiler to EMC after my
current refit to EMC on another machine is complete. The 3 spindle job
currently has a Fanuc 11m control with Fanuc DC drives an
forget color wrote:
> I installed EMC2 and Ubuntu using the live CD option about a year ago
> from this ISO:
>
> ubuntu-8.04-desktop-emc2-aj07-i386.iso
>
> It looks like the version of Ubuntu being used now hasn't changed but
> EMC2 has. Can I easily upgrade my copy of EMC2 or should I just start
I installed EMC2 and Ubuntu using the live CD option about a year ago
from this ISO:
ubuntu-8.04-desktop-emc2-aj07-i386.iso
It looks like the version of Ubuntu being used now hasn't changed but
EMC2 has. Can I easily upgrade my copy of EMC2 or should I just start
over with a new live CD?
thx
-
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