How about a magnetic dial indicator base? Unscrew the rod from the magnetic
base and tap a hole into the spindle casting to screw it in there instead. It
would give you fine adjustability anyway.
Scott
On Nov 22, 2013, at 11:32 AM, Gene Heskett ghesk...@wdtv.com wrote:
Greetings all;
I've been working to make general purpose threading scripts for the members at
our hackerspace. Scripts that face and turn down (or bore out) as well as
thread. My efforts at understanding and explaining CNC lathe threading are here:
I believe velocity is a scaled value of edges per second, so in quadrature
mode you'd need to multiply your slots by 4 to find the right scaling. Do
you numbers add up if you do that?
Scott
On Wed, Dec 12, 2012 at 8:14 PM, John figie zephyr9...@gmail.com wrote:
What is the sample rate of the
Thanks to everyone for the advice. Home/limits are working properly now.
My primary issue was that I had mis-configured the system so that after a
home operation in the positive direction the machine thought it was at the
negative soft limit, thus it would not let me jog off the hard limit even
Interestingly, this sort of sensor would have been helpful on my latest
problem with the lathe spindle Z pulse encoder I wanted to run on a pulley
at 3x the spindle rate, presuming there was software support for it. In my
case the pulse length accounting would have had to have been in the 7i33
All-
My Sieg KC4S lathe conversion is moving along, and I have a question about
driving a spindle motor controller using a Mesa 7i33 servo controller.
According to the docs, that daughter card uses sign/magnitude mode , which
will generate 0 to +10V analog out when the direction is positive and
solution.
Thanks!
Scott
On Sun, Nov 11, 2012 at 3:30 PM, andy pugh bodge...@gmail.com wrote:
On 11 November 2012 20:00, Scott Hasse scott.ha...@gmail.com wrote:
I plan on integrating the spindle control to be able to thread, but I am
wondering if the Z pulse needs to be strictly once per
Thanks all for the advice. I hadn't considered the case of reversing the
spindle a bit, that does shoot that idea down. Although I've enjoyed
Gene's spindle encoder adventures vicariously I don't think that's a path I
want to walk, so at this point my plan is to obtain a 1:1 timing belt
pulley
All-
I'm starting in the process of converting a Sieg SC2518 CNC lathe to
LinuxCNC control. I'll be using Mesa hardware, 5i23+7i33+7i37 and have had
good experience with that in the past. Incomplete in-process documentation
is here:
http://code.google.com/p/sector67-sandbox/wiki/SiegCNCLathe
Thanks, I should have been more accurate in my initial description. It is
a hall effect sensor.
Scott
On Sun, Nov 11, 2012 at 6:34 PM, Bruce Layne
linux...@thinkingdevices.comwrote:
On 11/11/2012 03:00 PM, Scott Hasse wrote:
...plus a magnetic reed switch that triggers once per chuck
generator I should be able to get a usable input once I am generating a
frequency appropriately.
Thanks everyone for their insight on this issue.
Scott
On Mon, Jul 2, 2012 at 9:01 AM, Jon Elson el...@pico-systems.com wrote:
Scott Hasse wrote:
John is correct. My logging could be more clear
30, 2012 at 7:10 PM, Peter C. Wallace p...@mesanet.com wrote:
On Sat, 30 Jun 2012, Scott Hasse wrote:
Date: Sat, 30 Jun 2012 18:01:02 -0500
From: Scott Hasse scott.ha...@gmail.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine
about 8000 ns on this
525mw with hyper threading disabled and the other recommended tweaks.
Scott
On Jul 1, 2012, at 11:38 AM, Jon Elson el...@pico-systems.com wrote:
Scott Hasse wrote:
Jun 30 17:48:41 scott-desktop kernel: [ 4078.255547] ENCODER runs between:
60
Jun 30 17:48:41 scott-desktop
John is correct. My logging could be more clear. The time between is
the since the last rising edge of the input pulse as detected by the update
function of the encoder running in the base thread. The counts between
is the number of base thread runs since the last rising edge input pulse.
The
My base thread is 2 ns (50 khz) and my servo thread is 100 ns. I
am running the update-counters in the base thread. I was thinking that
should limit my sampling noise to ~2% but instead it is ~20%. I don't
think I'm getting bounce errors as the parallel port pins in halscope show
I've been working to create some integration between the reprap RAMPS
stepper driver board and LinuxCNC. One interesting thing some 3D printers
do is disable the Z stepper motor when it is not moving. This relies on
the friction of the Z axis assembly for keeping the head in place, but
allows
All-
I am starting in with some experiments using the RepRap RAMPS board (
http://reprap.org/wiki/Arduino_Mega_Pololu_Shield) (basically a 3-5 axis
small stepper driver board with additional heater outputs and temperature
inputs), but instead of using an Arduino with firmware like sprinter for
All-
I am starting in with some experiments using the RepRap RAMPS board (
http://reprap.org/wiki/Arduino_Mega_Pololu_Shield) (basically a 3-5 axis
small stepper driver board with additional heater outputs and temperature
inputs), but instead of using an Arduino with firmware like sprinter for
Of course there are some people and businesses for which a retrofit will
make no sense. For our organization (community group with almost no
capital to speak of but lots of volunteer time/interest), our LinuxCNC
retrofits have been great. We are a group of hackers, many of whom
subscribe to the
I presume many of you have seen the hype on the Raspberry Pi. Am I correct
in thinking that getting LinuxCNC to run on one of those would require an
arm-specific RTAI and drivers for the device-specific I/O? Has anyone else
given any thought to this potentially disruptive platform in the context
I did a somewhat similar machine (+-10V amps, encoders) with similar Mesa
hardware with some documentation here:
http://code.google.com/p/sector67-sandbox/wiki/ProjectSheetCake
Getting the machine to move under control should be fairly straightforward.
Integrating the limits/estop and servo
. ... I'd put my money on the sun and solar energy.
What a source of power! I hope we don't have to wait until oil and coal
run out before we tackle that. -Thomas Edison, inventor (1847-1931)
From: Scott Hasse scott.ha...@gmail.com
To: Enhanced Machine Controller
Glad I can give back to this incredible community and project in some way.
We've done another retrofit as well, but I'm still working on the
documentation for that.
As you have questions, let me know. If the documentation doesn't make
sense, I'm glad to clarify it.
Scott
On Sun, Apr 29, 2012
Unfortunately, this approach doesn't work well for things like plastic
extrusion where it can be difficult to control the extrusion rate precisely.
Repraps, etc are able to succeed in part because they take a very naive
approach to trajectory planning and can get away with it because of the
It seems to me that the likelihood of fixing all of the methods of gcode
generation such that they don't generate short line segments is
approximately zero. Also, it seems that even if a proprietary LinuxCNC
gcode extension allowed arbitrary plane arcs, splines, etc. that the
likelihood of CAM
Thanks much for the correction, and you're certainly welcome to stop by
Madison any time and check out what we're doing.
http://code.google.com/p/sector67-sandbox/wiki/FrequencyBasedAnalogInput
--
Better than sec? Nothing
...@gmail.com wrote:
On 9 March 2012 03:46, Scott Hasse scott.ha...@gmail.com wrote:
My question is about this analog input.
One way to do this that I keep meaning to experiment with is to use a
PWM output to create a reference voltage, and a comparator to detect
whether it is above or below
I think there might be some confusion about what we are reading in via
voltage to frequency using a software encoder velocity in this case. The
analog value read as a frequency between 500 and 1000Hz is a scaled version
of the voltage of the EDM process itself. Our relatively naive
understanding
I must have been making some silly mistake. Adding the thread before the
EMCMOT is working for me now, and I have reasonable analog values being
read now. Thanks for the double check. The frequency capability is still
not as high as I calculated would be possible, but it is high enough to
avoid
15, 2012 at 11:43 AM, Kirk Wallace
kwall...@wallacecompany.comwrote:
On Thu, 2012-03-15 at 10:56 -0500, Scott Hasse wrote:
I'd prefer not to use the mesa encoder primarily because I want to use
the optical isolation I already have on the 7i37. Additionally with
the firmware setup I have (4
As a relative LinuxCNC newbie, I can say that a more clear presentation of
the capabilities of the system would have made it less daunting to choose
LinuxCNC. As a hobby CNC user, I had been exposed to probably 20
half-baked open source CAM tools/packages and been impressed with a total
of zero.
sub-hal files in the custom hal.
On Sat, Mar 17, 2012 at 9:31 AM, Viesturs Lācis viesturs.la...@gmail.comwrote:
2012/3/17 Scott Hasse scott.ha...@gmail.com:
[HAL]
HALUI = halui
HALFILE = 3300_mill.hal
HALFILE = custom.hal
POSTGUI_HALFILE = custom_postgui.hal
SHUTDOWN = shutdown.hal
, Peter C. Wallace p...@mesanet.com wrote:
On Sat, 17 Mar 2012, Scott Hasse wrote:
snip--
It acts like it is sampling the encoder at the servo-thread frequency,
despite the update-counters function being bound to the base
It just makes difficult for any observer to understand, what is going on
there.
If it works and You understand it - very good. But remember that if
You will ever want somebody else to understand it, then it can cause
frustration. I think that in situations like this it is best to stick
to
this? Would I also want to do it for
hm2_5i23.0.write
or is there no need?
Thanks much,
Scott
On Sat, Mar 17, 2012 at 10:55 AM, Peter C. Wallace p...@mesanet.com wrote:
On Sat, 17 Mar 2012, Scott Hasse wrote:
Date: Sat, 17 Mar 2012 10:43:56 -0500
From: Scott Hasse scott.ha...@gmail.com
Reply
Stopped down to the shop tonight to try:
addf hm2_5i23.0.read_gpio base-thread
Debug file information:
HAL: ERROR: function 'hm2_5i23.0.read_gpio' needs FP
analog-in.hal:4: addf failed
To me this implies it is not a real time capable function? I tried
creating a separate thread, but I get:
sending,
Thanks,
Scott
On Mar 15, 2012, at 2:50 AM, Viesturs Lācis viesturs.la...@gmail.com wrote:
2012/3/15 Scott Hasse scott.ha...@gmail.com:
with the frequency out going to an isolated I/O daughter
card input (Mesa 7i37 I believe) of a Mesa 5i23. The problem to me seems
to be the software
If you just want to go from analog to LinuxCNC, have you considered
using an ATmega to parallel port interface? The AVR can accept pure
analog or some pulsed variety, such frequency counting , PWM or PDM. A
dual parallel port PCI card is ~$15, Arduino Pro Mini for $20:
it is unclear, if the problem is with the hardware, or with the signal
handling within LinuxCNC...
Really both, but I've gotten solid advice on both as well. Hardware-wise,
the Mesa board looks good for my application.
Signal-handling-wise, I thought that an M66 analog read could be set to
I'm doing some volunteer work for a local hackerspace (sector67.org). We
recently completed conversion of two anilam knee mills to LinuxCNC, including
adding a 4th rotary stepper axis for one of the mills. We now want to do some
simple plunge EDM'ing, and ideally would reuse the LinuxCNC z
I must admit I've I've watched this thread unfold with a bit
of apprehension. Certainly the current direction has evolved to the point
where the result will likely not be usable for my purposes. I don't see a
way of using a flex/bison-based parser from python apart from native
bindings, so in
I see no need for anything pythonesk in machine control. This just
adds an obscure level of abstraction from the real machine.
I too wrote a gcode generator for some of my standard shapes but found
it was more elegant to do it in gcode
as I could use sensible(ish) variable names. why enter
?
__
John Harris
E-Mail jdhhar...@customstage.net
On 1/22/2012 2:46 AM, Michael Haberler wrote:
Am 22.01.2012 um 04:36 schrieb Scott Hasse:
I agree there is a large and difficult problem with respect to the
semantic
checking if the desire is to assure
All-
I'm thinking about writing some gcode filters for EMC2 in python, and want
to make these as robust and flexible as possible. To that end, I'm
wondering if there is a typical approach to parsing and validating
arbitrary-format gcode into some sort of canonical form so that a
text-based
I understand the basic parsing for the majority of common cases can be done
fairly easily, but this seems rather error-prone for something that will
eventually be moving a machine. I am hoping to build something that is
more robust for handling, e.g. inline comments and all of the other special
In the absence of an existing solution that is basically my plan as stated
above with antlr, which can generate a python parser. Although once the
grammar is codified, there is no shortage of parser generators that could
be applied. Some of the reasons Chris points out above lie at the heart of
On Wed, Nov 9, 2011 at 3:17 PM, Thomas Powderly tomp4...@gmail.com wrote:
On 11/8/11, Karl Cunningham ka...@keckec.com wrote:
On 11/06/2011 08:36 PM, Scott Hasse wrote:
It seems the normal way to do this would be to take the input to the
existing estop-ext signal put
I am working on the finishing touches of an Anilam 1100 knee mill
conversion to EMC2, with details here:
http://code.google.com/p/sector67-sandbox/wiki/ProjectSheetCake
Over the last couple of months our spindle VFD (a Compumotor SpindleBlok)
has faulted 5 or 6 times (a description of that
No problem at all. PNCconf was still an absolute time saver, and this issue
was a good reason to get more into some lower-level aspects of EMC2. I now
understand PID feedback a lot better than I did before, and I think that
knowledge will serve me very well as I complete this conversion project.
the drive and the controller?
I'll take some photos of my cabinets and put them on the forum later.
John
On 8/17/2011 2:48 PM, Scott Hasse wrote:
John: Thanks, I'm hoping the documentation will turn out to be useful.
We got the mill second or third hand, so we don't have the conversion
That was absolutely the bug I was hitting. After manually changing the I'm
now moving forward with the PID tuning!
Thanks all!
Scott
On Thu, Aug 18, 2011 at 8:18 PM, Scott Hasse scott.ha...@gmail.com wrote:
I'm running 2.4.3 per the live CD. I'll try manually making the max output
positive
.
Manually changing the ini file to have a positive MAX_OUTPUT resolved the
issue.
Thanks to all who helped resolve this.
Scott
On Thu, Aug 18, 2011 at 8:26 PM, Scott Hasse scott.ha...@gmail.com wrote:
That was absolutely the bug I was hitting. After manually changing the I'm
now moving forward
I'm in the shop working on this right now and am wondering how to verify the
PID loop is providing feedback to each axis. I've been using pncconf to
generate the configuration, and assumed since it allows you to set PID that
it would configure it to feedback automatically. However, since I've
I typed this up last night but realized I forgot to send it:
Thanks to all for the feedback so far. I'll try to answer all the
questions in one thread:
Peter: The servos are not getting enabled too soon, in fact they are
getting enabled later than is typical due to an extra servo reset
signal
. There are several possible ways of nesting
loops and combining control terms beside PID, so don't fall for the add a
little of this and then a little of that approach.
Jim
-Original Message-
From: Scott Hasse [mailto:scott.ha...@gmail.com]
Sent: Wednesday, August 17, 2011 2:32 PM
All-
I'm about a month into retrofitting an older Anilam 1100M 3-axis mill to
EMC2 using a Mesa 5i23 PCI board with a 7i33TA for servo interfacing and
7i37TA for general I/O. I'm documenting the build here:
http://code.google.com/p/sector67-sandbox/wiki/ProjectSheetCake
with my build notes
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