Re: [Emc-users] could Linux cnc control of unconventional mill design like this and general thoughts and comments.

[andy pugh]

On 6 November 2015 at 23:55, linden  wrote:

> Could linuxCNC something control this? or do I have 2 many variables with no
> fixed base position?

It is do-able, I think. You might  have redundant constraint, if so
the kinematics will need to be rather accurate.

It is a bit like a linear delta, and there is an existing
lineardeltakins out there. The difference is the lower arms, which
give you at least some more degrees of freedom for the effector. I am
not clear if twist of the plate is adequately separated from tilt of
the plate. I think your machine controls the height of each corner of
the triangle, but not the XY of each corner.

-- 
atp
If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

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[Emc-users] could Linux cnc control of unconventional mill design like this and general thoughts and comments.

[linden]

Hello All,

I have progressed a little with the design and modeling of the machine I 
asked for help simulating. It has evolved a little over the last few 
weeks. have a look at the pdf attached for pictures Another month and I 
will be back to the world of fast Internet and I should be able to try 
some of the previous suggestions for simulation.


 The big question is:

Could linuxCNC something control this? or do I have 2 many variables 
with no fixed base position?


A few other questions and thoughts I would like to pick your collective 
brains on.


How would you home something like this?
I stile haven't simulated the movement digitally yet or built a complete 
cardboard and drinking straw model, but i think i have finally settled 
on approximate geometry any questions or comments are gladly welcome.
Has any one seen any thing like this before I am sure I am not the 
first? Is there any grate big flaw with this logic that I have missed?


Advantages:

-  Uses relatively short ball screws for the motion envelope achieved.
-  Commonality and limited part count
-  If I can build the arms as hollow weldments  It should be possible to 
make the dynamic components very stiff and light allowing high speeds 
and acceleration.
   Still lots of work to do on this front. In the diagram attached 
things would bend like a wet noodle and I would soon get stress cracks.

- No spherical Joints (think it should work with out them not really sure)

Thanks in advance,

Linden

PS The model is made with FreeCad



hexaslide2.pdf
Description: Adobe PDF document
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Re: [Emc-users] could Linux cnc control of unconventional mill design like this and general thoughts and comments.

[John Dammeyer]

http://seemecnc.com/products/rostock-max-complete-kit

There are lots out there like that for 3D printing.

> -Original Message-
> From: linden [mailto:l...@island.net]
> Sent: November-06-15 3:55 PM
> To: emc-users@lists.sourceforge.net
> Subject: [Emc-users] could Linux cnc control of unconventional mill design
> like this and general thoughts and comments.
> 
> Hello All,
> 
> I have progressed a little with the design and modeling of the machine I
> asked for help simulating. It has evolved a little over the last few
> weeks. have a look at the pdf attached for pictures Another month and I
> will be back to the world of fast Internet and I should be able to try
> some of the previous suggestions for simulation.
> 
>   The big question is:
> 
> Could linuxCNC something control this? or do I have 2 many variables
> with no fixed base position?
> 
> A few other questions and thoughts I would like to pick your collective
> brains on.
> 
> How would you home something like this?
> I stile haven't simulated the movement digitally yet or built a complete
> cardboard and drinking straw model, but i think i have finally settled
> on approximate geometry any questions or comments are gladly welcome.
> Has any one seen any thing like this before I am sure I am not the
> first? Is there any grate big flaw with this logic that I have missed?
> 
> Advantages:
> 
> -  Uses relatively short ball screws for the motion envelope achieved.
> -  Commonality and limited part count
> -  If I can build the arms as hollow weldments  It should be possible to
> make the dynamic components very stiff and light allowing high speeds
> and acceleration.
> Still lots of work to do on this front. In the diagram attached
> things would bend like a wet noodle and I would soon get stress cracks.
> - No spherical Joints (think it should work with out them not really sure)
> 
> Thanks in advance,
> 
> Linden
> 
> PS The model is made with FreeCad



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Re: [Emc-users] could Linux cnc control of unconventional mill design like this and general thoughts and comments.

[TJoseph Powderly]

well it is like the rostock but has extra constraint in the extra 3 
tracks and arms
maybe this is to increase the rigidity.

the standard rostock looks and feels really wiggly to anyone used to 
tool room machines.

the drawings _suggest_ use of iron C channel, so I _guess_ rigidity is 
sought here.

there really only 1 position for the lower truck based on _all_ the 
upper trucks.

theres a lot of force on the joints to keep it rigid enough to mill metal.
https://www.youtube.com/watch?v=4xSkt9Fa8iQ

TomP tjtr33


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Re: [Emc-users] could Linux cnc control of unconventional mill design like this and general thoughts and comments.

[TJoseph Powderly]

this describes the stiffness and joint aspects better
https://www.youtube.com/watch?v=SSSvKt92tnA
no ball joints!
a knuckle/nutating head on end of 'inverted rostock'



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Re: [Emc-users] Those $16 Chinese TTS tool holders

[MC Cason]

On 11/06/2015 02:48 AM, Gene Heskett wrote:
> On Friday 06 November 2015 00:10:53 MC Cason wrote:
>
>>
>> I don't have a tool changer, so my comment may not work, but why
>> not have LinuxCNC send a signal out to a microcontroller, let the
>> microcontroller do it's job, and then have the microcontroller send a
>> signal back to LinuxCNC to tell it when it's done?  I do not consider
>> myself a programmer, but I'm still able to make the Arduino software
>> give me what I want.
>>
>> If a stock Arduino board doesn't have enough pins, the Teensy
>> series of boards have more pins available.  For me, $20.00 for the
>> 3.2, and $12.00 for the LC, was fairly cheap, considering what other
>> boards on the market cost.  Both of them use the Arduino software
>> (with addon sofware) as it's IDE.
>> https://www.pjrc.com/teensy/teensy31.html
>> https://www.pjrc.com/teensy/teensyLC.html
>
> I've considered that approach, but its a new language to learn. But for a
> $20 bill, maybe worth the effort.

If you do decide to use the Teensy 3.2, and you need all of the 
available pins, solder the SMD pin header onto the bottom of the board 
first, then solder the through hole headers.  Use a scrap of perf board 
to keep the header properly aligned while soldering it.

   The LC does not need this extra step, as it doesn't have all of the 
additional pins of the 3.2.


-- 
MC Cason
Eagle3D - Created by Matthias Weißer
github.com/mcason/Eagle3D



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Re: [Emc-users] Those $16 Chinese TTS tool holders

[Gene Heskett]

On Friday 06 November 2015 00:10:53 MC Cason wrote:

> On 11/05/2015 09:31 PM, Gene Heskett wrote:
> > On Thursday 05 November 2015 21:55:00 MC Cason wrote:
> >> Gene,
> >>
> >> I uploaded some pictures to Flickr, to show you how I have mine
> >> done:
> >> https://www.flickr.com/photos/46689581@N03/albums/72157660780465122
> >
> > Neat. But I'll need to come up with a more compact mounting for a
> > bunch of them to run a tool changer.  Perf-board likely will be
> > about ideal but I'll need to find space on that size of perf-board
> > for at least a 5 pack of those.  I can still conserve I/O pins on a
> > 5i25 by useing 3 bits as an address generator and 3 more for
> > enable/step/dir.  I don't see more than one motor moving at a time,
> > but with conventional wiring, a 5 motor setup is 15 output pins.  I
> > think I can beat that down to 6 if only one motor at a time is to be
> > moving.  3 to address which motor gets the signals, and 3 for
> > enable,dir,step.  All dir and step can be shared, but the 3 bit
> > address only enables the one addressed.
>
>I don't have a tool changer, so my comment may not work, but why
> not have LinuxCNC send a signal out to a microcontroller, let the
> microcontroller do it's job, and then have the microcontroller send a
> signal back to LinuxCNC to tell it when it's done?  I do not consider
> myself a programmer, but I'm still able to make the Arduino software
> give me what I want.
>
>If a stock Arduino board doesn't have enough pins, the Teensy
> series of boards have more pins available.  For me, $20.00 for the
> 3.2, and $12.00 for the LC, was fairly cheap, considering what other
> boards on the market cost.  Both of them use the Arduino software
> (with addon sofware) as it's IDE.
> https://www.pjrc.com/teensy/teensy31.html
> https://www.pjrc.com/teensy/teensyLC.html


I've considered that approach, but its a new language to learn. But for a 
$20 bill, maybe worth the effort.

>This is how the RepRap guys mount their boards:
> http://reprap.org/wiki/A4988_vs_DRV8825_Chinese_Stepper_Driver_Boards
>
>The perf board is just for prototyping, and I'm a couple of mods
> beyond the one in the pictures.  When I'm finally satisfied, I will
> have a few circuit boards made.  I know two people here locally that
> are interested in their own boards.  $48.00 for 3 from OSH Park, or
> $47.00 for 10 directly from China.  Decisions, decisions...
>
> > But I'm going to be out of pocket for a bit, tomorrow I get the
> > brakes redone on my GMC, If amazon manages to deliver Saturday, I'll
> > be busy putting our local AM'er back on the air at full power. 
> > Monday I am scheduled for a pair of saddle block shots in whats left
> > of my back, and if amazon doesn't deliver till Monday, I'll have to
> > see if I can finish that transmitter after I get back from the
> > shots.  Might not be able to pull that off till after the shots have
> > taken effect.  I was informed I'd need a driver.  Last time I drove
> > myself home.  But that was 2 years ago.  As a friend was fond of
> > saying, I'm not the man I once was, even once. ;-)
> >
> > Thanks, MC Cason.
> >
> > Cheers, Gene Heskett
>
>I know what you mean about having back problems.  I've been
> disabled for 14 years now, and live in constant pain.  I bought all of
> my machine tools to keep me from going crazy.

Thanks, MC Cason

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] Linux Mint

[John Thornton]

Hi Tim,

Thanks so much, can't wait to try it.

JT

On 11/5/2015 7:13 PM, tjma...@charter.net wrote:
>
>   - Original Message -
>>> To: emc-users@lists.sourceforge.net [1] >> From: j...@gnipsel.com [2]
>>> Date: Mon, 2 Nov 2015 14:26:43 -0600 >> Subject: [Emc-users] Linux
> Mint >> I have Linux Mint 17.2 and like the interface, are there any
>>> instructions on how to patch the kernel for real time? I ran uname
> -r >> and it reports 3.16.0-38 generic in 17.2. Cinnamon and Mate seem
> to be >> the best for me, I could not figure out where the turn off
> button was in >> XFCE lol. Finally found it and the name choice was
> poor. >> I've done a lot of things on computers but building or
> patching a kernel >> is not on that list so any advice is appreciated.
>>> Thanks >> JT
>   >> I would be interested in this too. >> I use RTAI >> Chris M
>
> John & Chris
> This will get you start with linuxmint-17.2-xfce-32bit read
> linuxcnc_readme all the way through and use setup.sh script. No need
> to compile new kernel
>
> Enjoy
> Tim March
>
>   
>
> Links:
> --
> [1] mailto:emc-users@lists.sourceforge.net
> [2] mailto:j...@gnipsel.com
>
>
>
> --
>
>
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Re: [Emc-users] linuxcnc-dev in Synaptic when using uspace (was Carousel Component)

[Rick Lair]

And there it is,

Thanks Jeff,



On 11/5/2015 8:32 PM, Jeff Epler wrote:
> You need to look for the properly named package:
>
> linuxcnc-uspace-dev - PC based motion controller for real-time Linux
>
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Thanks


Rick Lair
Superior Roll & Turning LLC
399 East Center Street
Petersburg MI, 49270
PH: 734-279-1831
FAX: 734-279-1166
www.superiorroll.com


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Re: [Emc-users] Those $16 Chinese TTS tool holders

[Gene Heskett]

On Friday 06 November 2015 05:34:56 MC Cason wrote:

> On 11/06/2015 02:48 AM, Gene Heskett wrote:
> > On Friday 06 November 2015 00:10:53 MC Cason wrote:
> >> I don't have a tool changer, so my comment may not work, but
> >> why not have LinuxCNC send a signal out to a microcontroller, let
> >> the microcontroller do it's job, and then have the microcontroller
> >> send a signal back to LinuxCNC to tell it when it's done?  I do not
> >> consider myself a programmer, but I'm still able to make the
> >> Arduino software give me what I want.
> >>
> >> If a stock Arduino board doesn't have enough pins, the Teensy
> >> series of boards have more pins available.  For me, $20.00 for the
> >> 3.2, and $12.00 for the LC, was fairly cheap, considering what
> >> other boards on the market cost.  Both of them use the Arduino
> >> software (with addon sofware) as it's IDE.
> >> https://www.pjrc.com/teensy/teensy31.html
> >> https://www.pjrc.com/teensy/teensyLC.html
> >
> > I've considered that approach, but its a new language to learn. But
> > for a $20 bill, maybe worth the effort.
>
> If you do decide to use the Teensy 3.2, and you need all of the
> available pins, solder the SMD pin header onto the bottom of the board
> first, then solder the through hole headers.  Use a scrap of perf
> board to keep the header properly aligned while soldering it.
>
>The LC does not need this extra step, as it doesn't have all of the
> additional pins of the 3.2.

Good to know, thanks, MC Cason

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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[Emc-users] Linuxcnc pre installed, (imrovments --> copyright)

[Karlsson & Wang]

They got the code for free and now they must share improvements for free. 

If a pre installed version of linuxcnc is found somewhere we should not forget 
the most important to check if they added someting useful. 




Nicklas Karlsson

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Re: [Emc-users] Linuxcnc pre installed, (imrovments --> copyright)

[Jack Coats]

Most good companies understand and are pretty good about giving back
appropraitely.  Bad companies are the ones that need to be harangued,
and even suggest they use a different software 

On Fri, Nov 6, 2015 at 11:15 AM, Karlsson & Wang
 wrote:
> They got the code for free and now they must share improvements for free.
>
> If a pre installed version of linuxcnc is found somewhere we should not 
> forget the most important to check if they added someting useful.
>
>
>
>
> Nicklas Karlsson
>
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-- 
><> ... Jack

The Four Boxes of Liberty - "There are four boxes to be used in the
defense of liberty: soap, ballot, jury and ammo. Please use in that
order."
"Whatever you do, work at it with all your heart"... Colossians 3:23
"Anyone who has never made a mistake, has never tried anything new." -
Albert Einstein
"You don't manage people; you manage things. You lead people." -
Admiral Grace Hopper, USN
"Tell me and I forget. Teach me and I remember. Involve me and I
learn." - Ben Franklin

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Re: [Emc-users] OT - Newsgroup email

[Karlsson & Wang]

For me it is normal to get my own emails back on this list on gEDA however it 
is the opposite.

Nicklas Karlsson

>Is it normal to NOT get your own emails back when posting to this 
> list?  My settings on the mailserver have "Receive your own post to the 
> list?" set to "Yes"
> 
>  I'm subscribed to over a dozen lists, and this is the only one that 
> it doesn't work on.
> 
> -- 
> MC Cason
> Eagle3D - Created by Matthias Weißer
> github.com/mcason/Eagle3D
> 
> 
> 
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[Emc-users] Off Topic Cron and FTP

[John Thornton]

I'm trying to upload some files to my web site to share using a cron job 
and ftp. The cron part looks simple enough from crontab, where I need 
help is the ftp part. Here is what I have so far and the error I get. Of 
course xxx yyy and zzz have the correct info in them.

#!/bin/sh
USERNAME="xxx"
PASSWORD="yyy"
SERVER="ftp.zzz.com"
# local directory to pickup *.tar.gz file
FILE="/home/john/cron/upload"
# remote server directory to upload backup
DIR="/zzz/files/splitter/cad"
echo USER $USERNAME
echo FILE $FILE/*.*
# login to remote server
ftp -n -i $SERVER 

Re: [Emc-users] Off Topic Cron and FTP

[Jerry Scharf]

John,

This is dusty past stuff, but I don't think mput likes a path. Try the
following ftp commands instead:
lcd /home/john/cron/upload
mput *.*

jerry

On Fri, Nov 6, 2015 at 12:59 PM, John Thornton  wrote:

> I'm trying to upload some files to my web site to share using a cron job
> and ftp. The cron part looks simple enough from crontab, where I need
> help is the ftp part. Here is what I have so far and the error I get. Of
> course xxx yyy and zzz have the correct info in them.
>
> #!/bin/sh
> USERNAME="xxx"
> PASSWORD="yyy"
> SERVER="ftp.zzz.com"
> # local directory to pickup *.tar.gz file
> FILE="/home/john/cron/upload"
> # remote server directory to upload backup
> DIR="/zzz/files/splitter/cad"
> echo USER $USERNAME
> echo FILE $FILE/*.*
> # login to remote server
> ftp -n -i $SERVER < user $USERNAME $PASSWORD
> cd $DIR
> mput $FILE/*.*
> quit
> EOF
> I get this error
> john@cave:~/cron$ ./upload.sh
> USER xxx
> FILE /home/john/cron/upload/golang.png
> /home/john/cron/upload/golang.png: No such file or directory
>
> Thanks
> JT
>
>
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-- 
Jerry Scharf
FINsix IT
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650.279.7017 m
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