Re: [Emc-users] 2.3.3

[Steve Stallings]

Gene,

I use an X1 style machine for my show demo unit. One
thing that helped an amazing amount at higher speeds
was adding an outboard support to the lead screw. I
cannot take credit for the idea, because frankly, I did
not originally think it would help much. We have several
guys in our local club with similar machines, and one
offered/forced me to let him add them to my machine.
It required making an extension to the lead screw, but
the result was worthwhile. My guess is that the screw
vibrates in the clearance in the nut and anchoring the
outboard end significantly reduced the ability of the
screw to move off axis as it vibrated. The task of
extending the screws was made easier for us because
there are longer screws available from Little Machine
Shop for the large table option on the X1, and because
we had the Y axis set up with the motor in the back
of the machine, something not easily done on the X2.

Regards,
Steve Stallings
 

> -Original Message-
> From: Gene Heskett [mailto:gene.hesk...@gmail.com] 
> Sent: Sunday, October 25, 2009 5:43 PM
> To: Enhanced Machine Controller (EMC)
> Subject: [Emc-users] 2.3.3
> 
> Greetings;
> 
> It seems 2.3.3 works ok for me, thanks a bunch guys.
> 
> One other Q though.  My x&y screws are 20 tip acme, and its 
> cooling down, even with a heater running the machine is maybe 
> at 55F right now, and the Y screw in particular is howling up 
> a storm.  Its wet, quite wet with a mixture that is part STP 
> and vactra.  I've had this problem before, and no lube I've 
> tried seems to really be _the_ fix.  Bar oil, 10w40, 3in1, 
> STP, wd-40 & some spray stuff different from wd-40 have all 
> been squirted rather liberally on it to no avail.  I now have 
> ball bearings in the bearing bosses on the end of the tables, 
> and a grease fitting drilled into the bore between them but 
> because of the clearance, grease applies very very slowly 
> there, and doesn't seem to effect the squeal at all.  The 
> bearings are mechanical seals, so theoretically I should be 
> able to blow grease right on through them given enough time.
> 
> Is there a magic panther pi$$ for this application other than 
> money for ball screws?
> 
> --
> 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)
> The NRA is offering FREE Associate memberships to anyone who 
> wants them.
> 
> 
> Old programmers never die, they just become managers.
> 
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Re: [Emc-users] 2.3.3

[Andy Pugh]

2009/10/25 Gene Heskett :

>  the Y
> screw in particular is howling up a storm.

Is it perfectly straight? I am wondering if it slender enough to be whipping?

-- 
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Re: [Emc-users] 2.3.3

[Dave]

I have a customer who processes foam and the foam dust is corrosive.   
They process the foam with saws in several locations in the plant and
they have become masters at using air blowoff and air pressurization to 
keep the dust out of the machinery.   I'd consider putting a small 
blower in the area of the ball screws to try and keep a positive 
pressure in the vicinity of the screws.  Source the air from an area 
away from the machine so it is relatively dust free or put a filter on 
the blower intake.

Dave

Gene Heskett wrote:
> On Monday 26 October 2009, Glenn Edwards wrote:
>   
>> Gene,
>>
>> Chris is right about the alignment being the place to start- make sure it's
>> right before you move on.  Second, what are the nut and screw materials?
>> Brass on steel is normal, but if you have something different then keep
>> that in mind.  While dry bearings do have their place, unless you are
>> generating a lot of dust like Chris I suggest you stay with grease.  There
>> are hundreds of varieties out there, but you should look in the following
>> places.  You may have to run a different grease for summer and winter. 
>> Look for additives that help with lubricity.  And get rid of the oils and
>> combinations you are trying.  A good place to start is with Moly wheel
>> bearing grease for the summer and lithium grease for the winter.  And
>> Machinery Handbook has a good section on lubricants.  At the rpm's found on
>> most machines, manually applying the grease to the screws and bearings
>> should last several months under hard labor.  Good luck.
>>
>> -- --
>> Glenn
>>
>> 
>>> One other Q though.  My x&y screws are 20 tip acme, and its cooling
>>> down, even with a heater running the machine is maybe at 55F right
>>> now, and the Y screw in particular is howling up a storm.  Its wet,
>>> quite wet with a mixture that is part STP and vactra.  I've had this
>>> problem before, and no lube I've tried seems to really be _the_ fix. 
>>> Bar oil, 10w40, 3in1, STP, wd-40 & some spray stuff different from
>>> wd-40 have all been squirted rather liberally on it to no avail.  I
>>> now have ball bearings in the bearing bosses on the end of the tables,
>>> and a grease fitting drilled into the bore between them but because of
>>> the clearance, grease applies very very slowly there, and doesn't seem
>>> to effect the squeal at all.  The bearings are mechanical seals, so
>>> theoretically I should be able to blow grease right on through them
>>> given enough time.
>>>
>>> Is there a magic panther pi$$ for this application other than money
>>> for ball screws?
>>>   
>> I guess you have a similar alignment uissue I had recently. Grease did not
>> solve my problem. To solve it, I loosened all screws that held / fixed the
>> end bearings, aligned them one by one and fixed them again using loctite.
>> My mill has roughly 1900x550x250 mm on xyz. So the main thing was on x
>> naturally. I also had to loosen the "nuts" that position the x axis,
>> turned them so they would show easy turning and refixed them again using
>> loctite for the fixing screws. Then I ran a simple code that uses full
>> extent of all axes for a couple of hours. That wears off the brims that
>> may have been left from thread production and now I am going at 1300mm/min
>> on all axes which is good enugh for me.
>>
>> I do cut wood mainly. Dust was an issue until I had my dust vent installed
>> (lots of air sucked in and only occasionally a rather large grain does not
>> get sucked in). Grease and dust bakes. My finding is, you are probably
>> better off using dry graphite than grease. I removed all grease and am now
>> on graphite.
>>
>> hth
>>
>> chris
>>
>> 
> Thanks Glenn.  I'll take that motor off and check that again in the next day 
> or so.
>
>   


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Re: [Emc-users] 2.3.3

[Chris Epicier]

Dear Steve

 
> I use an X1 style machine for my show demo unit. One
> thing that helped an amazing amount at higher speeds
> was adding an outboard support to the lead screw. I
> cannot take credit for the idea, because frankly, I did
> not originally think it would help much. We have several
> guys in our local club with similar machines, and one
> offered/forced me to let him add them to my machine.
> It required making an extension to the lead screw, but
> the result was worthwhile. ...

Could you point me to some pics / sketches /samples of this 'outboard' support? 
Maybe it could help me increase the speed along the x axis of my mill

thx 
chris


  

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Re: [Emc-users] 2.3.3

[Jon Elson]

Steve Stallings wrote:
> My guess is that the screw
> vibrates in the clearance in the nut and anchoring the
> outboard end significantly reduced the ability of the
> screw to move off axis as it vibrated.
Oh, wow!  This sounds like an equivalent of bearing whirl, where the
journal starts rolling around the inside of the bearing like a wheel
instead of just spinning on its axis.  More rigidity ought to help, but
Acme screws were just never designed to handle the speeds we see with
CNC, especially 16 TPI screws.

Jon

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[Emc-users] Comp problem

[Leonardo Marsaglia]

Hello everybody, i'm trying to use comp (i've already compiled a kernel
module with comp) but i can't make it work. It says that the comp command is
not recognized as a bash command, and may be the program comp is in the nmh
or mailutils-mh package, i installed the packages but i still can't make it
work.

I don't know if i'm missing some packages or something.. i don't remember if
the other time i used comp i got that problem.

So any help will be appreciated..

Thanks in advance.

Leonardo.
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Re: [Emc-users] 2.3.3 - mini-mill screw support

[Steve Stallings]

The machine is loaned out at the moment, and I don't
have any pictures. The leadscrew was extended by 
drilling and boring a hole in the end, and then pressing
in the turned down end of the extension. The other
end of the extension was turned down to fit a single
standard bearing, not a preloaded pair. This bearing
was mounted in a plate attached to the other end
of the table. All it does is keep the screw from whipping
around.

Steve Stallings  

> -Original Message-
> From: Chris Epicier [mailto:seuch...@yahoo.de] 
> Sent: Monday, October 26, 2009 10:28 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] 2.3.3
> 
> Dear Steve
> 
>  
> > I use an X1 style machine for my show demo unit. One thing 
> that helped 
> > an amazing amount at higher speeds was adding an outboard 
> support to 
> > the lead screw. I cannot take credit for the idea, because 
> frankly, I 
> > did not originally think it would help much. We have 
> several guys in 
> > our local club with similar machines, and one 
> offered/forced me to let 
> > him add them to my machine.
> > It required making an extension to the lead screw, but the 
> result was 
> > worthwhile. ...
> 
> Could you point me to some pics / sketches /samples of this 
> 'outboard' support? Maybe it could help me increase the speed 
> along the x axis of my mill
> 
> thx
> chris
> 
> 
>   
> 
> --
> 
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> ahead of the curve. Join us from November 9 - 12, 2009. Register now!
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Re: [Emc-users] Comp problem

[Kirk Wallace]

On Mon, 2009-10-26 at 13:47 -0300, Leonardo Marsaglia wrote:
> Hello everybody, i'm trying to use comp (i've already compiled a kernel
> module with comp) but i can't make it work. It says that the comp command is
> not recognized as a bash command, and may be the program comp is in the nmh
> or mailutils-mh package, i installed the packages but i still can't make it
> work.
> 
> I don't know if i'm missing some packages or something.. i don't remember if
> the other time i used comp i got that problem.
> 
> So any help will be appreciated..
> 
> Thanks in advance.
> 
> Leonardo.

The first thing that comes to my mind, you need to install the emc2-dev
package (System / Administration / Synaptic Package Manager).


-- 
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.wallacecompany.com/E45/index.html
California, USA


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[Emc-users] G68 coordinate system rotations (apparently it's been implemented?!?!)

[Colin MacKenzie]

According to this recent page...
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?action=browse&diff=3&id=EmcFeatures

...G68 has been implemented. However, I have 2.3.3 installed and it says 
"unknown gcode". I've been looking forward to this gcode for a long time. I 
would use it to easily correct any misalignments of the workpiece. For example, 
in drilling pcb's I would touch off at one drill point (or any reference 
point), go to an opposite drill point and compute the necessary rotation in the 
XY plane. I would automate this process in my drill file gcode generator.

Sure, there are ways of realigning the workpiece, but I often end up a few mils 
or so off and it takes longer.

Anyone know the true status of this feature? I heard a year ago it would be 
tough to implement because of the nature of emc's framework. (??)

C
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Re: [Emc-users] G68 coordinate system rotations (apparently it's been implemented?!?!)

[sam sokolik]

I do not know where you get the g68 code but coordinate rotation is 
implemented in the development version of emc2. -This is done using g10. 
   Direction for getting it here 
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Installing_EMC2#On_Ubuntu_6_06_or_8_04_from_source
definition here
http://www.linuxcnc.org/docs/devel/html/gcode_main.html#sub:G10:-Set-Coordinate
http://www.linuxcnc.org/docs/devel/html/gcode_main.html#sec:G10-L20

I have played with it -  Works great :)
http://www.electronicsam.com/images/KandT/testing/rotate1.png
http://www.electronicsam.com/images/KandT/testing/rotate.png

sam




Colin MacKenzie wrote:
> According to this recent page...
> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?action=browse&diff=3&id=EmcFeatures
>
> ...G68 has been implemented. However, I have 2.3.3 installed and it says 
> "unknown gcode". I've been looking forward to this gcode for a long time. I 
> would use it to easily correct any misalignments of the workpiece. For 
> example, in drilling pcb's I would touch off at one drill point (or any 
> reference point), go to an opposite drill point and compute the necessary 
> rotation in the XY plane. I would automate this process in my drill file 
> gcode generator.
>
> Sure, there are ways of realigning the workpiece, but I often end up a few 
> mils or so off and it takes longer.
>
> Anyone know the true status of this feature? I heard a year ago it would be 
> tough to implement because of the nature of emc's framework. (??)
>
> C
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>   

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Re: [Emc-users] 2.3.3

[Jack]

On another list, I have seen suggestion to use motorcycle chain grease if grease
is insisted on.  Mainly because it does not collect the fine dust
particles like regular
grease does.  It is designed for use in a very 'dirty' environment.

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Re: [Emc-users] 2.3.3 - mini-mill screw support

[John Kasunich]

On Mon, 26 Oct 2009 13:01 -0500, "Steve Stallings"
 wrote:
> The machine is loaned out at the moment, and I don't
> have any pictures. The leadscrew was extended by 
> drilling and boring a hole in the end, and then pressing
> in the turned down end of the extension. The other
> end of the extension was turned down to fit a single
> standard bearing, not a preloaded pair. This bearing
> was mounted in a plate attached to the other end
> of the table. All it does is keep the screw from whipping
> around.
> 

One way to tackle something like this would be to drill,
bore, and possibly ream the end of the shaft to take a
standard hardened and ground dowel pin.  Press the pin
into the shaft, leaving enough sticking out to serve as
a precision "stub shaft".  Then use a small, cheap needle
bearing to support the dowel.

John Kasunich
-- 
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  jmkasun...@fastmail.fm


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Re: [Emc-users] 2.3.3

[Gene Heskett]

On Monday 26 October 2009, Andy Pugh wrote:
>2009/10/25 Gene Heskett :
>>  the Y
>> screw in particular is howling up a storm.
>
>Is it perfectly straight? I am wondering if it slender enough to be
> whipping?
>
1/2 inch, and I've had it out, looks straight. Can't see any wobble when it 
turns if I shine a light in there either.  If there was room, I might put 
bigger, fasted screws in it but after a while I may as well go get an X3 & 
restart this 'project'. :)

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There is nothing wrong with abstinence, in moderation.

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Re: [Emc-users] 2.3.3 - mini-mill screw support

[Gene Heskett]

On Monday 26 October 2009, John Kasunich wrote:
>On Mon, 26 Oct 2009 13:01 -0500, "Steve Stallings"
>
> wrote:
>> The machine is loaned out at the moment, and I don't
>> have any pictures. The leadscrew was extended by
>> drilling and boring a hole in the end, and then pressing
>> in the turned down end of the extension. The other
>> end of the extension was turned down to fit a single
>> standard bearing, not a preloaded pair. This bearing
>> was mounted in a plate attached to the other end
>> of the table. All it does is keep the screw from whipping
>> around.
>
>One way to tackle something like this would be to drill,
>bore, and possibly ream the end of the shaft to take a
>standard hardened and ground dowel pin.  Press the pin
>into the shaft, leaving enough sticking out to serve as
>a precision "stub shaft".  Then use a small, cheap needle
>bearing to support the dowel.
>
>John Kasunich
>
I considered such an approach, didn't because I couldn't figure out how to 
make it quickly removable so the table itself could be removed by simply 
unscrewing the drive bolt from the nut.  Which also means there is no way to 
install it that I can imagine, short of drilling into the table and putting 
in cap screws to hold the bearing boss in place. :(

It seems to do it worse when the y table is out near the end of the screw.

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Re: [Emc-users] 2.3.3

[Hubert Bahr]

Gene
From the drift in this thread it sounds like you have an X2 using 
stock screws.  In my case I abandoned the stock screws and went with 
lower cost rolled ball screws.  I decided the X2 wasn't rigid enough to 
justify precision screws.  Of course at 5 tpi I get plenty of 
longitudinal motion without super high rotating speeds.  I used .625 
inch screws.  I did have to remove some metal for clearance on the 
table, saddle and base.  I chose to move on to an X3 as it would provide 
more rigidity and X, Y and Z motion.  There, I am still using the stock 
screws, just until I get some other things under control, like emc2 
control of spindle speed and change to belt drive for greater speed 
range.  I already have the screw stock and nuts on hand, It is just 
things are working well enough that the other changes take higher 
priority.  I did find the X3 much easier to convert although the Z axis 
takes a much larger motor.   I guess I am confused at what kind of speed 
you would have on the Y axis with less than 4" of travel that would 
cause bearing noise.

Hubert  

Gene Heskett wrote:
> On Monday 26 October 2009, Andy Pugh wrote:
>   
>> 2009/10/25 Gene Heskett :
>> 
>>>  the Y
>>> screw in particular is howling up a storm.
>>>   
>> Is it perfectly straight? I am wondering if it slender enough to be
>> whipping?
>>
>> 
> 1/2 inch, and I've had it out, looks straight. Can't see any wobble when it 
> turns if I shine a light in there either.  If there was room, I might put 
> bigger, fasted screws in it but after a while I may as well go get an X3 & 
> restart this 'project'. :)
>
>   


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Re: [Emc-users] 2.3.3

[Gene Heskett]

On Monday 26 October 2009, Hubert Bahr wrote:
>Gene
>From the drift in this thread it sounds like you have an X2 using
>stock screws.  In my case I abandoned the stock screws and went with
>lower cost rolled ball screws.  I decided the X2 wasn't rigid enough to
>justify precision screws.  Of course at 5 tpi I get plenty of
>longitudinal motion without super high rotating speeds.  I used .625
>inch screws.  I did have to remove some metal for clearance on the
>table, saddle and base.  I chose to move on to an X3 as it would provide
>more rigidity and X, Y and Z motion.  There, I am still using the stock
>screws, just until I get some other things under control, like emc2
>control of spindle speed and change to belt drive for greater speed
>range.  I already have the screw stock and nuts on hand, It is just
>things are working well enough that the other changes take higher
>priority.  I did find the X3 much easier to convert although the Z axis
>takes a much larger motor.   I guess I am confused at what kind of speed
>you would have on the Y axis with less than 4" of travel that would
>cause bearing noise.

I don't believe its bearing noise, but the screw chattering in the nut.  

And I have, with the LMS table kit, about a 5.25 by ~12" motion envelope, so 
it can do its current G0 speed of 25.2"/min with less than a 3 turns of the 
motor accel ramp.  I re-designed the z axis completely, and with a 425 motor 
on the z screw with a 17/42 belt reduction, I can now put 155 pounds on a 
drill bit, whereas with a 262 on the original setup, the head gibs bound and 
locked at about 5 pounds.  Screws behind the post are a very bad design 
unless the z ways are 2 or 3 times longer.  But you are right about the 
rigidity, its rather sorely lacking, as one would expect in a sub 100 pound 
machine.  With all my mods, it might weigh 100 lbs now, but the basic frame 
is still as flexible as ever.

Thanks Hubert

-- 
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Re: [Emc-users] 2.3.3

[Hubert Bahr]

Gene
I was dissatisfied with both the speed and the backlash so I 
abandoned the stock screw and went to the ballscrew. I now arbitrarily 
set the max speed at 80" per minute.  During this change I upgraded to 
the G540 drives as well.  I haven't measured the force on the drill bit, 
but can easily snap one when things go wrong.  The engineering data on 
the Ball Screw site indicates you can push 3 times the load with a ball 
screw over an acme screw.  My experience to date supports that claim.  
On the Z axis  I am using a 280 oz/in direct drive.  Could it be 
drive/stepper noise.  I certainly noticed that my steppers are much 
quieter now since the upgrade.
Hubert

Gene Heskett wrote:
> On Monday 26 October 2009, Hubert Bahr wrote:
>   
>> Gene
>>From the drift in this thread it sounds like you have an X2 using
>> stock screws.  In my case I abandoned the stock screws and went with
>> lower cost rolled ball screws.  I decided the X2 wasn't rigid enough to
>> justify precision screws.  Of course at 5 tpi I get plenty of
>> longitudinal motion without super high rotating speeds.  I used .625
>> inch screws.  I did have to remove some metal for clearance on the
>> table, saddle and base.  I chose to move on to an X3 as it would provide
>> more rigidity and X, Y and Z motion.  There, I am still using the stock
>> screws, just until I get some other things under control, like emc2
>> control of spindle speed and change to belt drive for greater speed
>> range.  I already have the screw stock and nuts on hand, It is just
>> things are working well enough that the other changes take higher
>> priority.  I did find the X3 much easier to convert although the Z axis
>> takes a much larger motor.   I guess I am confused at what kind of speed
>> you would have on the Y axis with less than 4" of travel that would
>> cause bearing noise.
>> 
>
> I don't believe its bearing noise, but the screw chattering in the nut.  
>
> And I have, with the LMS table kit, about a 5.25 by ~12" motion envelope, so 
> it can do its current G0 speed of 25.2"/min with less than a 3 turns of the 
> motor accel ramp.  I re-designed the z axis completely, and with a 425 motor 
> on the z screw with a 17/42 belt reduction, I can now put 155 pounds on a 
> drill bit, whereas with a 262 on the original setup, the head gibs bound and 
> locked at about 5 pounds.  Screws behind the post are a very bad design 
> unless the z ways are 2 or 3 times longer.  But you are right about the 
> rigidity, its rather sorely lacking, as one would expect in a sub 100 pound 
> machine.  With all my mods, it might weigh 100 lbs now, but the basic frame 
> is still as flexible as ever.
>
> Thanks Hubert
>
>   


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[Emc-users] EMC at NAMES, 2010

[Dale Grover]

This spring a few folks put together a booth at the North American 
Model Engineering Expo in Toledo, Ohio.  We had a 10' x 10' booth 
with two 8' tables, an Emco F1 CNC machine running EMC (mostly 
cutting wax and/or air), and some great, large-format photos of 
various machines that run EMC.  (Not to mention a great banner!)  We 
had 200 CDs of EMC to hand out, and had a ton of interested folks 
stop by.  (See the wiki for more details: 
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?EMC2AtNAMES )

NAMES is moving (back) to the Detroit area (Southgate--see 
http://www.modelengineeringsoc.com/expo.htm) for 2010, and will run 
April 24-25.

Is anyone else interested in putting together a booth or other 
activity to promote EMC at NAMES in 2010?  Or have ideas?  This year 
we reserved a booth rather late in the game--we might have other 
options in 2010, including

--seminar(s)?
--more space for demos?  Multiple machines?
--classes?
--coordinating location-wise with other EMC-related folks who will be 
exhibiting (e.g., Jon Elson and Steve Stallings)
--handouts?  CDs?


Thanks,

--Dale

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Re: [Emc-users] EMC at NAMES, 2010

[Steve Stallings]

Dale,

PMDX would certainly be interested in coordinating booths
with any EMC related presence at NAMES. We had a choice
site at the last show, but due to the move, all bets are off.
The sooner we can ask for a group placement, the better.

Steve Stallings 

> -Original Message-
> From: Dale Grover [mailto:dgro...@redcedar.com] 
> Sent: Monday, October 26, 2009 7:24 PM
> To: EMC User List
> Subject: [Emc-users] EMC at NAMES, 2010
> 
> This spring a few folks put together a booth at the North 
> American Model Engineering Expo in Toledo, Ohio.  We had a 
> 10' x 10' booth with two 8' tables, an Emco F1 CNC machine 
> running EMC (mostly cutting wax and/or air), and some great, 
> large-format photos of various machines that run EMC.  (Not 
> to mention a great banner!)  We had 200 CDs of EMC to hand 
> out, and had a ton of interested folks stop by.  (See the 
> wiki for more details: 
> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?EMC2AtNAMES )
> 
> NAMES is moving (back) to the Detroit area (Southgate--see
> http://www.modelengineeringsoc.com/expo.htm) for 2010, and 
> will run April 24-25.
> 
> Is anyone else interested in putting together a booth or 
> other activity to promote EMC at NAMES in 2010?  Or have 
> ideas?  This year we reserved a booth rather late in the 
> game--we might have other options in 2010, including
> 
> --seminar(s)?
> --more space for demos?  Multiple machines?
> --classes?
> --coordinating location-wise with other EMC-related folks who 
> will be exhibiting (e.g., Jon Elson and Steve Stallings) 
> --handouts?  CDs?
> 
> 
> Thanks,
> 
> --Dale
> 
> --
> 
> Come build with us! The BlackBerry(R) Developer Conference in SF, CA
> is the only developer event you need to attend this year. 
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> developing skills, take BlackBerry mobile applications to 
> market and stay 
> ahead of the curve. Join us from November 9 - 12, 2009. Register now!
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> 


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Re: [Emc-users] 2.3.3

[Gene Heskett]

On Monday 26 October 2009, Hubert Bahr wrote:
>Gene
>I was dissatisfied with both the speed and the backlash so I
>abandoned the stock screw and went to the ballscrew. I now arbitrarily
>set the max speed at 80" per minute.  During this change I upgraded to
>the G540 drives as well.  I haven't measured the force on the drill bit,
>but can easily snap one when things go wrong.  The engineering data on
>the Ball Screw site indicates you can push 3 times the load with a ball
>screw over an acme screw.  My experience to date supports that claim.
>On the Z axis  I am using a 280 oz/in direct drive.  Could it be
>drive/stepper noise.  I certainly noticed that my steppers are much
>quieter now since the upgrade.
>Hubert
>
So where does one get ball screws cheap enough to use on an X1 upgrade?
As far as drills or milling bits go, I have blown a VSD fuse and snapped off 
a 1/4" solid carbide 4 fluter a couple of times now.

Thanks Hubert.

-- 
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)
The NRA is offering FREE Associate memberships to anyone who wants them.


A little experience often upsets a lot of theory.

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[Emc-users] Hobby users near Nashville TN?

[Jack]

Are there other EMC2 users near Nashville TN, especially avocational users?

><> ... Jack

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Re: [Emc-users] 2.3.3

[Andy Pugh]

2009/10/27 Gene Heskett :

> So where does one get ball screws cheap enough to use on an X1 upgrade?

Depends how cheap is cheap enough. eBay is one source, I got my 8mm
Y-axis from there. I got the others from here:
http://www.slidesandballscrews.com/r1605-ballscrew-p-120.htmlcPath=39&osCsid=a8fb38ca49d7a4f1ccaf2d30ceb1e09a

And I have found few places as cheap.


-- 
atp

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Re: [Emc-users] EMC at NAMES, 2010

[Jon Elson]

Steve Stallings wrote:
> Dale,
>
> PMDX would certainly be interested in coordinating booths
> with any EMC related presence at NAMES. We had a choice
> site at the last show, but due to the move, all bets are off.
> The sooner we can ask for a group placement, the better.
>
>   
Yeah, I'm still trying to decide whether to go to NAMES.
What are the plans for the EMC codefest
next year?  Will we be in Ann Arbor with Village Press's CNC Workshop?
About 2 months between them, so that's good to catch up on other stuff.

I don't think Dale has been to Southgate Community Center, it will be 
NOTHING
like Toledo.  Plywood sheets over hockey ice, and two rooms much smaller 
than
the big room in Toledo.  It may be a REAL mess, as everyone has gotten 
used to
being able to sprawl out in Toledo.  Some of the vendors brought 
everything smaller
than a VBM or a 1:1 scale locomotive from their inventory.  Also, they 
have only 3
TINY meeting rooms.  I am expecting something pretty close to a disaster 
without the
Parkinsons keeping things running smoothly.

Jon

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Re: [Emc-users] EMC at NAMES, 2010

[Dave]

Any idea why they moved it to Southgate?  I thought the Seagate center 
was pretty nice.

Dave

Jon Elson wrote:
> Steve Stallings wrote:
>   
>> Dale,
>>
>> PMDX would certainly be interested in coordinating booths
>> with any EMC related presence at NAMES. We had a choice
>> site at the last show, but due to the move, all bets are off.
>> The sooner we can ask for a group placement, the better.
>>
>>   
>> 
> Yeah, I'm still trying to decide whether to go to NAMES.
> What are the plans for the EMC codefest
> next year?  Will we be in Ann Arbor with Village Press's CNC Workshop?
> About 2 months between them, so that's good to catch up on other stuff.
>
> I don't think Dale has been to Southgate Community Center, it will be 
> NOTHING
> like Toledo.  Plywood sheets over hockey ice, and two rooms much smaller 
> than
> the big room in Toledo.  It may be a REAL mess, as everyone has gotten 
> used to
> being able to sprawl out in Toledo.  Some of the vendors brought 
> everything smaller
> than a VBM or a 1:1 scale locomotive from their inventory.  Also, they 
> have only 3
> TINY meeting rooms.  I am expecting something pretty close to a disaster 
> without the
> Parkinsons keeping things running smoothly.
>
> Jon
>
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>   


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Re: [Emc-users] 2.3.3

[Gene Heskett]

On Monday 26 October 2009, Andy Pugh wrote:
>2009/10/27 Gene Heskett :
>> So where does one get ball screws cheap enough to use on an X1 upgrade?
>
>Depends how cheap is cheap enough. eBay is one source, I got my 8mm
>Y-axis from there. I got the others from here:
>http://www.slidesandballscrews.com/r1605-ballscrew-p-120.htmlcPath=39&osCsi
>d=a8fb38ca49d7a4f1ccaf2d30ceb1e09a

Error 404, not found

>And I have found few places as cheap.

I went to the home page and found them.  The screws are at a good price, but 
the nuts are beyond my reach.  And shipping?  I'm in the U.S.

-- 
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"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
The NRA is offering FREE Associate memberships to anyone who wants them.


Anyone stupid enough to be caught by the police is probably guilty.

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[Emc-users] Hobby users near Nashville TN?

[Cecil Thomas]

Jack,
I'm in Lenoir City, TN.  Within a Stone's throw of the I-40 / I-75 
Junction southwest of Knoxville.

I am using EMC2 to run a 10 mm Derbyshire  instrument lathe and a 
Millrite vertical Mill with xyz and a axes.

Not exactly near Nashville but I have been there a few times.

Cecil


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Re: [Emc-users] Comp problem

[Leonardo Marsaglia]

Thank you very much kirk, i downloaded the package and worked.

2009/10/26 Kirk Wallace 

> On Mon, 2009-10-26 at 13:47 -0300, Leonardo Marsaglia wrote:
> > Hello everybody, i'm trying to use comp (i've already compiled a kernel
> > module with comp) but i can't make it work. It says that the comp command
> is
> > not recognized as a bash command, and may be the program comp is in the
> nmh
> > or mailutils-mh package, i installed the packages but i still can't make
> it
> > work.
> >
> > I don't know if i'm missing some packages or something.. i don't remember
> if
> > the other time i used comp i got that problem.
> >
> > So any help will be appreciated..
> >
> > Thanks in advance.
> >
> > Leonardo.
>
> The first thing that comes to my mind, you need to install the emc2-dev
> package (System / Administration / Synaptic Package Manager).
>
>
> --
> Kirk Wallace
> http://www.wallacecompany.com/machine_shop/
> http://www.wallacecompany.com/E45/index.html
> California, USA
>
>
>
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Re: [Emc-users] 2.3.3

[Hubert Bahr]

Gene
I used Roton 
http://www.roton.com/ballscrews-ballnuts-nav.aspx?line=Recirculating  
for both my X2 and X3 unfortunately I only found the 5/8 screws 
reasonable.   Yes the ball nuts are a major cost as I use 2 for each 
axis.  Nuts less than $25 each.  I don't know how they would fit in an X1.

Hubert

Gene Heskett wrote:
> On Monday 26 October 2009, Andy Pugh wrote:
>   
>> 2009/10/27 Gene Heskett :
>> 
>>> So where does one get ball screws cheap enough to use on an X1 upgrade?
>>>   
>> Depends how cheap is cheap enough. eBay is one source, I got my 8mm
>> Y-axis from there. I got the others from here:
>> http://www.slidesandballscrews.com/r1605-ballscrew-p-120.htmlcPath=39&osCsi
>> d=a8fb38ca49d7a4f1ccaf2d30ceb1e09a
>> 
>
> Error 404, not found
>
>   
>> And I have found few places as cheap.
>> 
>
> I went to the home page and found them.  The screws are at a good price, but 
> the nuts are beyond my reach.  And shipping?  I'm in the U.S.
>
>   


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Re: [Emc-users] 2.3.3

[Gene Heskett]

On Monday 26 October 2009, Hubert Bahr wrote:
>Gene
>I used Roton
>http://www.roton.com/ballscrews-ballnuts-nav.aspx?line=Recirculating
>for both my X2 and X3 unfortunately I only found the 5/8 screws
>reasonable.   Yes the ball nuts are a major cost as I use 2 for each
>axis.  Nuts less than $25 each.  I don't know how they would fit in an X1.
>
Yes, their bronze nut for 1/2-10 looks exactly like the ones I got from MSC, 
but paid over $30 ea for 2 about 3 years ago.  I have them screwed into a 
piece of steel and use the thread pitch diffs as a backlash takeup mechanism.  
They both can be seen here:


Which is a picture of the whole mill with the new z axis kluge from the right 
side.

In this case the screw does not turn, the nut(s) do, trapped between some 
good sized thrust type ball bearings sitting in the alu blocks.
>Hubert
>
>Gene Heskett wrote:
>> On Monday 26 October 2009, Andy Pugh wrote:
>>> 2009/10/27 Gene Heskett :
 So where does one get ball screws cheap enough to use on an X1 upgrade?
>>>
>>> Depends how cheap is cheap enough. eBay is one source, I got my 8mm
>>> Y-axis from there. I got the others from here:
>>> http://www.slidesandballscrews.com/r1605-ballscrew-p-120.htmlcPath=39&os
>>>Csi d=a8fb38ca49d7a4f1ccaf2d30ceb1e09a
>>
>> Error 404, not found
>>
>>> And I have found few places as cheap.
>>
>> I went to the home page and found them.  The screws are at a good price,
>> but the nuts are beyond my reach.  And shipping?  I'm in the U.S.
>
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Re: [Emc-users] EMC at NAMES, 2010

[Jon Elson]

Dave wrote:
> Any idea why they moved it to Southgate?  I thought the Seagate center 
> was pretty nice.
>   
There have been warring parties within the NAMES leadership for a number 
of years.
The only reason they moved to Toledo was that Barbara and Truman 
Parkinson got in
charge of selecting a venue, and I think they sprung the Toledo thing on 
the rest of
the leadership as a done deal, with a several year contract.  The 
Parkinsons live East of Toledo,
so it was a great thing for them.  The rest of the leadership is from 
the Detroit area, very
hooked in with the auto industry.  I also heard (from Barb) that Toledo 
gave them a deal that
was too good to pass up.  Anyone who went to the 2006 NAMES knows that 
Toledo was
ABSOLUTELY DEAD that year.  It was just eerie to walk out on the streets 
during the day and
there were NO, ZERO people out.  I was glad to see this had REALLY 
changed this last year,
there were all sorts of night spots open, etc.  A lot of the perks the 
hotels were giving away in the first
years have gone away, too.  My guess is part of it was the Seagate was 
asking for a lot more money
for next year.


My first visit to NAMES (2001?) it was in the Yack arena, which was 
literally a Quonset hut that
looked like it was used to store feedbags the rest of the year.  They 
packed 1000+ people into
the area of a big basement!  It was AWFUL, you could be marooned in a 
sea of people for 15 minutes
until a couple people all moved in the same direction at the same time.  
Fortunately, that was the LAST
year for the Yack.  (Well, OK, the Yack Arena is actually big enough to 
fit a regulation hockey rink,
but I guess the extreme crowding just made it seem half that size or 
even less.  The poor lighting also
made it seem smaller.)

So, they were in the Southgate Civic Center from 2002 through 2006.  The 
first year they only had
one rink and the lobby area, later they got both rinks.  One big problem 
is they usually have a hockey game
Sunday night, so they have like FOUR HOURS to tear down the entire show 
so at least one rink can be
used.  That is an insane mess for the NAMES crew.  A lot of people 
didn't like standing for 8 hours on a
sheet of ice, even with a little plywood on top.  The warped plywood was 
pretty bad to roll heavy gear on,
also.  There is also a dearth of hotels in the Southgate area, including 
some really BAD ones.


Jon

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