For probe compensation batch reading would be far more useful than compiled in,
then it becomes simple to read the compensation file for any stylus
you change too.
Dave Caroline
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"The computer I am using is showing it's age and the ancient version
of Debian I have been running won't even boot properly on my new
computer." implies some change to us, what?, changing OS will change
the latency too
Dave
New PC new possible latency problems?
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oops missed a link
http://www.archivist.info/cnc/wormtest/
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There are some odd uses that dont lend themselves to video
I have used Linuxcnc for Worm division accuracy testing
http://www.collection.archivist.info/searchv13.php?searchstr=pd+wormtest
another used it for antenna measuring
http://emcar.sourceforge.net/
Dave Caroline
As that one has a range then you turn to final diameter ans dont go
too deep with the insert, that leaves a flat on top.
Measure on the job with thread wires etc to check depth.
Dave Caroline
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There are two folds used in bellows both should be easy to find
a google images search for
bellows fold pattern
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Better off with helical or bevel gears for 90 degrees I think.
Else you will have to space widely and go over shaped rollers so it
arrives at the pulleys square and hope it does not wear too fast. flat
belts used some crafty alignment and crowned pulleys for this.
Dave Caroline
You could get an analogue in connected to stepgen.N.position-cmd to do this
with any scaling needed. What is the use case?
Dave Caroline
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Traditional pattern making was 3d built up, did not need subtractive
milling or 3d plastic printer
:)
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I have tried a SFH213 Photodiode with a comparator but it is a bit
fiddly and not that sensitive, will try a QSE159 when it arrives.
Dave Caroline
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(less than an inch to get a signal)
Results will be on the web soon.
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you dont need space for an edm machine the fella down the road
probably accepts folding paper, price depends on qty, I get taps burnt
out for a tenner
Dave
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probably easiest to EDM the square
Dave Caroline
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Classic metal transfer due to the arc
Dave Caroline
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I have started to do a mysql version
output at
http://www.archivist.info/cnc/gcode/
changes, added parameters, added an ID, fixed a few things, added some
missing codes
and not finished...
there is a link to the .sql at the bottom of the page
Dave Caroline
It perhaps would be useful as a .sql file so it can be placed in a
mysql/web database
Dave Caroline
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If you look at an old swiss cam auto then the concept of interleaved
moves was exactly how they optimised the speed of the cycle.
On my Bechler the tooling is on separate slides with accessory live
axes opposite the spindle.
Dave Caroline
Horribly broken web page javascript I see a blank white page
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That is very out of date, LinuxCNC having branching etc in the gcode
as well as rigid tapping, read the docs for real info not random
websites
Dave Caroline
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The differential gears are nothing to do with prime but to add the
traverse into the equation and also to add a rotation for a helical.
I have a diagram of one at
http://www.collection.archivist.info/hobbing.html
then you can wind the hob back along its cut traverse and it remains "in gear&q
And I used Andy's info and cnc'd a Barber Colman hobbing machine
http://www.collection.archivist.info/searchv13.php?searchstr=barber+colman+pd
Dave Caroline
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Maybe some kins so it is a real vector (I think that is what another
art installation did)
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the manual methods we were using
in the clockworks. I started with only 2 axes under cnc the rest
manual (rotary and cutter pass)
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HPC gears in the UK make pulleys in the same way as I do and list the
intermediate stage in their catalogue, see
http://www.hpcgears.com/n/products/15.toothed_bar_stock/toothed_bar_stock.php
or make a hub assembly and press fit any gear on
Dave Caroline
met that problem before
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. sorry no picture
of that area after cleaning.
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rchv13.php?searchstr=harrison+pd
I got that rusty anyway then stored the base outdoors
No before pictures but this was found outdoors in a puddle at a scrapyard
http://www.collection.archivist.info/searchv13.php?searchstr=dumore
after cleaning de rusting and tested, not been painted.
Dav
I have an LT02 with LP2 probe that I need the protocol to switch it on
although for a backup I got a standard socket (FC3 iirc) that the LP2
can fit in so normal wired connection can be used
Dave Caroline
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.php?searchstr=valeron
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I get around this sort of problem with various forms of travelling microscope
http://www.collection.archivist.info/searchv13.php?searchstr=travelling+pd
to measure an axis travel I used an accurate DTI in one plane
http://www.archivist.info/cnc/screw_error/
Dave Caroline
I get rid of the curled/rough edge by a bit of grinding/filing and
also I roll it with a ball bearing on a bit of ground flat steel with
a finger through the bearing pressing down.
Sharp scissors or best tins nips
Dave Caroline
Polygon turning https://www.youtube.com/watch?v=KMdBIBzGtKI
multi spindle cnc https://www.youtube.com/watch?v=97JZX1JkYQk
sliding head with a back spindle
https://www.youtube.com/watch?v=TkYNLlk6EE0
and for the greedy multi spindle milling
https://www.youtube.com/watch?v=_IYFMfM7dYk
Dave
I am on gmail and did see the pic
Dave Caroline
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They did not say no, were not saying no, were not implying no,
You misunderstood, jepler was merely asking for a pull request to make
the review process easy.
He wants to help.
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Mobile security can be
I a picture of the machine and setup could have helped, it could be
vibration of tool, machine or work.
You also did not mention the material, Some materials have grain due
to how they are made.
Dave Caroline
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Interesting that someone else is looking at this subject. A few days
ago I dug out an old machine I rescued from factory about to be
redeveloped, it has no grooves and also rotation is from above if
wanted.
http://www.collection.archivist.info/searchv13.php?searchstr=cooke+polishing
Dave Caroline
It mostly gets in the way so is usually off the bed.
Dave
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The denford starturn has the switch on the saddle and a sliding member
gripping the bed just visible under the chuck to the rear
http://www.collection.archivist.info/archive/DJCPD/PD/2009/2009_09_10_Starturn_cnc_lathe/P1010045.JPG
So you can put it where you need for a setup
Dave Caroline
Also please be aware of
http://www.micromo.com/microstepping-myths-and-realities
a consistent amount of movement from a microstep is not going to happen
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about 800 grit and reassembled, no problem since.
it is the regular oiling and keeping dirt out that keeps old stuff running.
http://www.middleton-leawood.org.uk/leawood/photos.html
Dave Caroline
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Find and fix
lift the two surfaces apart on a film of lubricant.
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And a reading list if you have a good local library
http://www.collection.archivist.info/searchv13.php?searchstr=621.822
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This is a deep subject named tribology. some lubricant makers also
provide recommendations.
see refs at bottom
https://en.wikipedia.org/wiki/Tribology
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we are all saying it makes NO difference how many trailing 0s you have
the accuracy is machine and its maths, see Andy's answer
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see http://wiki.linuxcnc.org/cgi-bin/wiki.pl?TrajectoryControl
and
http://linuxcnc.org/docs/2.6/html/gcode/gcode.html#sec:G64
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the extensions to the right are correct for this probe
No makers name or model on the outside
numbers inside 1444 0,25
It has limit switches if deflected too far.
I wonder if anyone know the actual maker and model so I can hunt a bit
more for information
Dave Caro
Actually tapered gibs are a pain if they dont have a screw both ends,
Those with a single screw are in a slot so they can resist the gibs
tendency to self tighten and for removal of the gib. Broken or bent
gib screws seem to be a regular problem with taper gibs.
Dave Caroline
them
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I used to create my gears with a bit of php but then is became obvious
that the same maths could be done in gcode, one less step, so the
preamble in the gcode has a tooth qty/whatever is needed for that
class of work.
Dave Caroline
gn%20Monitor&utm_term=Read%20More#overlay-context=news/servotrends/new-ethercat-io-controller/
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What I did was reduce the maximum acceleration so the motor took less
current coming up to speed.
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Dewey I had no idea that size limit existed, same default for negative?
Maybe time for an update to the docs? even removal of the standard
from stepconf (or at least ask the user)
Dave
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Here is an example of with and without limits in a trunnion design
http://www.ebay.co.uk/itm/CNC-Rotary-Table-Dividing-Head-Rotational-Axis-4th-5th-Axis-A-B-Axis-100MM-Chuck-/161679996211
Dave
On 05/01/2016, andy pugh wrote:
> On 5 January 2016 at 04:37, Cecil Thomas wrote:
>> By the way if the
needed.
There are rotaries with mechanical limits and rotaries without limits,
an arbitrary large number used as a limit is a kludge waiting to bite
the unsuspecting.
Dave Caroline
number of "standards" swiss,black forest and
the british one based on the swiss.
http://www.clock-works.clara.net/cata/wnpc3.html
Dave Caroline
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I would see a problem if I did not nod the a axis to remove the backlash.
Dave Caroline
On 03/01/2016, Cecil Thomas wrote:
> I guess I wasn't as clear as I had hoped about my question.
> To be more specific:
> When the commanded value for a move is converted
m and that was in naval brass for a tower clock, it is
closer to a bronze.
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And another thing, almost all rotaries have backlash, do make sure
this is removed in gcode before you start cutting this will result in
a single tooth error.
Dave Caroline
I forgot to mention, I had no accumulated step loss in my tests, I
started each test with encoders at 0 and they completed with 48000 and
2, not even a +-1 digit error which surprised me.
Dave Caroline
tooth error average
for the 48 tooth gear and the high resolution microstepping error,
which currently shows as regular noise on the upper graphs.
Dave Caroline
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Emc-
motion.spindle-at-speed IN BIT
the IN states it is an input so you already found it.
that pin being in the pins section of
http://linuxcnc.org/docs/html/man/man9/motion.9.html
Dave Caroline
resistance too if you can.
Others are likely to mention you have two grounds rather than a star
ground. Make sure cases are tight to frame to guarantee continuity
Dave Caroline
any capacitive or inductive coupling.
Dave Caroline
On 20/12/2015, John Thornton wrote:
> I have a BP knee mill with an Anilam 1100M CNC kit on it. I've removed
> all the Anilam controls a while back. I've retained the drives and power
> supply and added a GS2 VFD for the spi
://www.ebay.co.uk/itm/Hilger-Watts-Optical-Square-30-Degree-Polygon-TP125-S-No-91335-/161898795565
Dave Caroline
On 15/12/2015, Rafael wrote:
> I was wondering what is the easiest way to make a T-slot aluminum based
> frame for CNC square?
>
> No matter how good is the cross cut, it
design problem.
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Hobs can be ground to generate cycloidal teeth as well as involute,
the key word here is "generate" which is the process of making the
required curve.
Dave Caroline
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_
While the index will be in the same place, any tooth form error will
affect hobbing.
Must write this subject up one day.
Dave
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Hobbing it is the easy bit, keeping the backlash and tooth form error
out much harder
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I have the mechanical version on one of the lathes too, it is job
specific I dont see how a proximity switch could know all possible
errors of eg hitting jaws, chuck body or work or even the headstock.
The little denford cnc lathe has the electrical stop movable on the
bed.
Dave
-
I have seen this on my machine which still has 2.4 on, it is on a
machine with not enough ram. I make sure unwanted background stuff is
not running to avoid it.
Dave
On 29/10/2015, Stuart Stevenson wrote:
> Gentlemen,
> re: the cinci at MPM
> When they push the arrow key to move an axis the ma
the tensator style are also used as constant force for tool balance
purposes and can be almost any size to suit.
Dave
On 27/10/2015, andy pugh wrote:
> On 27 October 2015 at 15:35, Dave Caroline
> wrote:
>> These are not much more than a version of a plain clock spring. I
>>
These are not much more than a version of a plain clock spring. I
imagine a bit of modification to a large clock spring or get a spring
from one of the pull out barriers used in public areas trade name was
tensator iirc
Dave
On 27/10/2015, andy pugh wrote:
> Does anyone know a cost-effective sou
A good make from near me (30 miles ish,) I imagine a cnced version
would be useful
Dave
On 06/10/2015, Marshland Engineering wrote:
> I've just purchased an old but good Jones and Shipman grinder. While
> stripping
> it all for sand blasting and repainting, it looks like a great candidate
> for
Actually this problem touches the independent axes problem that I
foresee in my sliding head lathe where an axis that will be cutting
later needs to start part way though another's coordinated move in
order to save time.
Dave Caroline
On 24/09/2015, andy pugh wrote:
> On 24 September 20
might be better to let the two talk to each other in some way so move
starts/runs are really synchronised properly rather than rely on
buffers.
eg classic ladder or some clocking or whatever
Dave Caroline
On 24/09/2015, Jerry Scharf wrote:
> Hi,
>
> I have hacked up a simple program t
too.
I do use small lathes (watch (DC) and clockmaker (AC induction motor)
sizes) and need to get the RPM up a lot for small stuff.
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.25 thou before seeing the encoder edge. not something I would try.
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machine dependent(and its settings) and I doubt anyone can
write a general specification.
I wonder if the tap makers have any numbers for machine taps.
Dave Caroline
On 11/08/2015, Jon Elson wrote:
> On 08/10/2015 06:38 PM, David Bagby wrote:
>> Hi,
>> I'm planning a mill co
about half a degree iirc.
On the Barber Colman, see the ball handle upper middle to the rear of the head
http://www.collection.archivist.info/archive/DJCPD/PD/2014/2014_09_17_Barber_Colman_cnc/IMG_1830.JPG
That has a vernier marked to allow estimation to 5 min
"squiffy" One also needs to take into account the face width of the
cutter so it is not always possible to do that.
Also while dreaming of applications and methods, worm wheels need a
plunge rather than go across the face, one could also use a special
path to match a prospective worm with the curv
remains as a feature.
Dave Caroline
On 30/07/2015, John Kasunich wrote:
>
>
> On Wed, Jul 29, 2015, at 09:35 PM, richsh...@comcast.net wrote:
>> I am adapting a version of the "little hobber" and want to use linux-CNC
>> to do the ratio division between the hob and the
+colman
and http://www.archivist.info/cnc/hob2/
there are some more thoughts I wrote up some years ago
http://www.collection.archivist.info/hobbing.html
in that diagram there is a differential, a hal comp has recently been
implemented so that is now possible
Dave Caroline
On 30/07/2015, richsh
Linuxcnc supports subroutines with a different syntax
http://linuxcnc.org/docs/html/gcode/o-code.html
Dave Caroline
On 26/07/2015, John Thornton wrote:
> Just because code is available in other controls doesn't automagicly
> mean it is included in LinuxCNC. That is an unrealistic
Use a collet chuck with auto closing.
I have seen one machine where the wood was pushed through a square
driven collet and over a grinding head similar to a swiss lathe. was
making fishing floats in balsa
Dave Caroline
/watch parts, getting the edge on
centre is critical for good work
Dave Caroline
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I only found something called XP mode for a printer port
Dave
On 29/06/2015, Gene Heskett wrote:
> On Monday 29 June 2015 11:07:24 Todd Zuercher wrote:
>> Does any one know of any breakout boards that will work with X-mode? I
>> mean besides simple straight through terminal blocks. Preferably
>>
what X-mode
Dave Caroline
On 29/06/2015, Todd Zuercher
wrote:
> Does any one know of any breakout boards that will work with X-mode? I mean
> besides simple straight through terminal blocks. Preferably something with
> isolation and
Just waiting is a symptom of not seeing the index pulse
Dave Caroline
On 23/06/2015, Marius Liebenberg wrote:
> Any suggestions please gents?
>
>>I am testing a wizard that Robert Adams is doing for threading with
>>Linuxcnc. There are problems with the Gcode but I am not clue
If you have it wired, just rotate n turns and watch the variable get
updated in halmeter
should come to some sensible number I wouldnt be surprised to see it
being n*(700 or 8000 clue in the part number)* 4
Dave Caroline
On 21/05/2015, Rick Lair wrote:
> I have a Fanuc spindle motor on the
While mentioning the top speed no one is mentioning the acceleration
rate, try slowing that down. Also increase supply voltage to the
motor/drive as this also gives a faster more powerful response from
the motor drive combination.
Dave Caroline
On 05/05/2015, Tom Easterday wrote:
> Thanks, I
+0 -0 is an ok number for climb milling, which most CAM thinks it is
ok to do for best finish, else you should program your paths for
conventional milling where the play is taken up by the cutting force.
Dave Caroline
On 07/04/2015, Karl Jacobs wrote:
> just for correctness: 0.1mm is abou
ompound or
surface rust off cast iron without the damage a sharp wire brush can
inflict.
Some surfaces need a fine wet and dry paper(880-1200 grit) to make
them pretty again.
an example
http://www.collection.archivist.info/searchv13.php?searchstr=barber+colman
Dave Caroline
On 29/03/2015, Pe
Looks like a nice casting to start a project from.
I had rear nuts on the Hobbymat MD65, utter pain.
Other thing to think about collets and taper, I usually use cheap
morse taper collets but that often gives problems for long stuff.
The good side was selling off the junk parts I no longer wanted
(causing ringing or worse). This comes from my
experience as part of a team working on a video switcher.
Dave Caroline
I just did a RF probing then a rf pcb probing google search
On 18/03/2015, Philipp Burch wrote:
> Hello everyone!
>
> Thanks for all the great responses. I looks like it
Explained at
http://linuxcnc.org/docs/html/gcode/overview.html#sec:messages
debug being a special case of msg
Dave Caroline
On 17/03/2015, Marius Liebenberg wrote:
> Can someone please tell me where does the debug statement in Gcode
> print its
within specification and used for some gear
cutting masters I made. The Vertex 90:1 I use seems ok not done the
full test I did on the 72:1.
Method was angle dekkor and precision polygon.
Dave Caroline
On 03/03/2015, Tomaz T. wrote:
> What could be the reason that stepper is losing steps at very
That physical example I showed is actually just an A plus index, it
was original fitment on my Starturn cnc lathe that I upgraded to
linuxcnc, even the optos are original.
Screw on chucks too
Dave
On 01/03/2015, Martin Dobbins wrote:
>
>
>
>> >
>> If you are interfacing the encoder directly thro
If using a parallel port I would say that has a rather high count,
This sort can he home brewed (48 slot) :-
http://www.collection.archivist.info/archive/DJCPD/PD/2013/2013_08_04_starturn_encoder/IMG_1631.JPG
and still give the through hole
Dave Caroline
On 01/03/2015, andy pugh wrote:
> O
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