Re: [Emc-users] Multi-spindle machines

[John Thornton]

Cool!

JT


On 6/20/2016 5:50 PM, andy pugh wrote:
> I have created a new feature-branch that supports up to 8 spindles.
> Spindle-synched moves such as threading and feed-per-rev can be
> synched with any spindle.
>
> The readme file for a sample config in the feature branch is here;
> https://github.com/LinuxCNC/linuxcnc/tree/andypugh/JA14_multispindle/configs/sim/axis/lathe_multispindle
>


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Re: [Emc-users] Multi-spindle machines

[andy pugh]

I have created a new feature-branch that supports up to 8 spindles.
Spindle-synched moves such as threading and feed-per-rev can be
synched with any spindle.

The readme file for a sample config in the feature branch is here;
https://github.com/LinuxCNC/linuxcnc/tree/andypugh/JA14_multispindle/configs/sim/axis/lathe_multispindle

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Re: [Emc-users] Multi-spindle machines

[Gregg Eshelman]

Old multi-spindle mills were used to cut multiple identical copies, usually 
with a hydraulic tracer running on a pattern. For that kind of use the code 
wouldn't need to be any different. Just load your 2+ workpieces then run the 
machine.
Another multi spindle machine that was used before CNC was the multi station 
pantograph. It had a large turntable in the middle with several stations where 
work pieces could be loaded. At each position around the edge was a pantograph 
arm with a milling spindle and a pattern to trace, or another thing like a 
drilling spindle if only a single hole had to be drilled at that step. The 
operator would remove the finished item then load in a new blank and hit the 
advance button. I suspect that at the "speed" hydraulic tracers could hit, one 
operator could service three or four such machines.
Such an amazing array of mechanically complicated machines made obsolete by the 
first numeric controlled single spindle milling machine with an automatic tool 
changer. Imagine doing a full CNC conversion of a K 2D mill... pretty 
pointless because the offset spindle rotation capability of the 2D can be 
copied by CNC movement of the table.

 
  From: andy pugh <bodge...@gmail.com>
 To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net> 
 Sent: Tuesday, May 24, 2016 2:59 PM
 Subject: [Emc-users] Multi-spindle machines
   
Has anyone here ever wanted multi-spindle support in LinuxCNC?
What is the use-case? What does multi-spindle G-code look like?

   
 
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Re: [Emc-users] Multi-spindle machines

[Todd Zuercher]

We several multi spindle wood carving routers already running Linuxcnc.  It was 
not hard to set up a little hal logic to enable/disable the spndle(s) you want 
to use.  I set up a few custom M-codes, for it.  Works like a charm.

Big heavy duty multi spindle woodworking machines used to be much more common, 
before multitool tool changers caught on.  In the 1980s and early 90s these 
machines would often be set up with 4 or more spindles and usually used 
individually like a tool changer.  But with the potential for parallel 
operation as well.  A quick google search will turn up quite a few old Heian, 
Shoda, Komo, or Northwood machines for sale of that vintage.  We have an old 
Heian built this way in 1984, that originally had 5 spindles over a 4x8ft table 
Only 3 remain).  It is quite the beast of a machine and is where I go to hide 
during a tornado warning.  These sort of machines have fallen out of favor of 
late, mostly because they are big, heavy, slow, and very expensive to build, 
but they can make excellent cuts, and are nearly indestructible.

- Original Message -
From: "andy pugh" <bodge...@gmail.com>
To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
Sent: Tuesday, May 24, 2016 4:59:03 PM
Subject: [Emc-users] Multi-spindle machines

Has anyone here ever wanted multi-spindle support in LinuxCNC?
What is the use-case? What does multi-spindle G-code look like?

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Re: [Emc-users] Multi-spindle machines

[Eric Keller]

we have a "lathe" at work that has a spindle that uses "S" codes and a
rotary "C" axis.  The rotary axis often is used as a spindle.  The
spindle feeds on Z and the C axis is mounted on X. But I suppose
that's not what you are asking about.

On Tue, May 24, 2016 at 4:59 PM, andy pugh  wrote:
> Has anyone here ever wanted multi-spindle support in LinuxCNC?
> What is the use-case? What does multi-spindle G-code look like?
>
> --
> atp
> "A motorcycle is a bicycle with a pandemonium attachment and is
> designed for the especial use of mechanical geniuses, daredevils and
> lunatics."
> — George Fitch, Atlanta Constitution Newspaper, 1916
>
> --
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Re: [Emc-users] Multi-spindle machines

[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 Caroline

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Re: [Emc-users] Multi-spindle machines

[andy pugh]

On 24 May 2016 at 23:24, Ralph Stirling  wrote:
> Don't know which kind of multispindle machine you were thinking of...

I was thinking in general terms

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Re: [Emc-users] Multi-spindle machines

[Ralph Stirling]

I would enjoy, given the opportunity, attempting to set up LCNC on
a turning center with a main spindle, subspindle, and multiple turrets.
These are very efficient machines for making turned parts (and
generally have live tooling as well).  I believe one typical way of
controlling these is with a separate G-code program for each turret,
with interlock M-codes to synchronize when doing things like pinch
turning.  With an upper turret and a lower turret, either turret can
work on either spindle, but you have to decide which operations
will be performed by which turret.  So in the CAM software you
drag your operations around to try to balance the machining time
for each turret, and get the syncs correct so you grab your part
with the subspindle before you cut it off, then move it off and
machine the back side with one turret while starting on the face
of the next part with the other turret.

Don't know which kind of multispindle machine you were thinking of...

-- Ralph

From: andy pugh [bodge...@gmail.com]
Sent: Tuesday, May 24, 2016 1:59 PM
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] Multi-spindle machines

Has anyone here ever wanted multi-spindle support in LinuxCNC?
What is the use-case? What does multi-spindle G-code look like?

--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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Re: [Emc-users] Multi-spindle machines

[Gene Heskett]

On Tuesday 24 May 2016 17:42:46 John Thornton wrote:

> In my case no as only one spindle is being used at a time. I assume
> for multi-spindle routers where they are making several copies of the
> same part that one speed for all is OK.
>
> JT

I have such a multiple copy machine about 30 miles away,  It bores the 
rectangular holes in oak fence posts for split rail fencing, which I 
have about 150 feet of here.  In 2, or 3 plunges depending on a 2 rail 
or 3 rail fence, it bores the rail holes in ten posts at a time.  Then 
the green oak goes into the treatment tank. About 4 seconds per 10 holes 
in 10 posts.  Takes a lot longer than that to unload the posts and put 
fresh ones in.  With enough spindle power that a visibly badly worn tool 
doesn't do anything but make the splinters in the edges of the holes 
worse.  The tapered end of the split rail doesn't care.
>
> On 5/24/2016 4:19 PM, andy pugh wrote:
> > On 24 May 2016 at 22:07, John Thornton  wrote:
> >> I've seen some talk about multi-spindle routers and I'm fixing to
> >> start working on one. The main thing is being able to turn the
> >> spindles off and on as needed.
> >
> > Would you need different speeds on different spindles? I rather
> > suspect not, in the multi-head router case.
>
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> Employees who bring their own devices (BYOD) to work are irked by the
> imposition of MDM restrictions. Mobile Device Manager Plus allows you
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Re: [Emc-users] Multi-spindle machines

[John Thornton]

In my case no as only one spindle is being used at a time. I assume for 
multi-spindle routers where they are making several copies of the same 
part that one speed for all is OK.

JT


On 5/24/2016 4:19 PM, andy pugh wrote:
> On 24 May 2016 at 22:07, John Thornton  wrote:
>> I've seen some talk about multi-spindle routers and I'm fixing to start
>> working on one. The main thing is being able to turn the spindles off
>> and on as needed.
> Would you need different speeds on different spindles? I rather
> suspect not, in the multi-head router case.
>


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Re: [Emc-users] Multi-spindle machines, used for?

[andy pugh]

On 24 May 2016 at 22:16, Nicklas Karlsson  wrote:
> I have seen old multi spindle for sale cheap but not been able to figure any 
> good use for it.

Just to be clear, I am not talking about multi-spindle screw-machines
here. Those are cool, but not relevant.
Those machines typically do one operation per spindle while rotating
each spindle past each station, with all the spindles turning at the
same speed. (so several operations happen in parallel on several
workpieces)

I am talking about CNC machines (if there are any) with multiple
independently controlled spindles.

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Re: [Emc-users] Multi-spindle machines

[andy pugh]

On 24 May 2016 at 22:07, John Thornton  wrote:
> I've seen some talk about multi-spindle routers and I'm fixing to start
> working on one. The main thing is being able to turn the spindles off
> and on as needed.

Would you need different speeds on different spindles? I rather
suspect not, in the multi-head router case.

-- 
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Re: [Emc-users] Multi-spindle machines, used for?

[Nicklas Karlsson]

I have seen old multi spindle for sale cheap but not been able to figure any 
good use for it. I have suspected there have been good sales person.

On another occasion I could see CNC machine sold "not used since bought from 
seller"


On Tue, 24 May 2016 16:07:35 -0500
John Thornton  wrote:

> I've seen some talk about multi-spindle routers and I'm fixing to start 
> working on one. The main thing is being able to turn the spindles off 
> and on as needed. The last one I did I used digital out IIRC.
> 
> JT
> 
> 
> On 5/24/2016 3:59 PM, andy pugh wrote:
> > Has anyone here ever wanted multi-spindle support in LinuxCNC?
> > What is the use-case? What does multi-spindle G-code look like?
> >
> 
> 
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Re: [Emc-users] Multi-spindle machines

[John Thornton]

I've seen some talk about multi-spindle routers and I'm fixing to start 
working on one. The main thing is being able to turn the spindles off 
and on as needed. The last one I did I used digital out IIRC.

JT


On 5/24/2016 3:59 PM, andy pugh wrote:
> Has anyone here ever wanted multi-spindle support in LinuxCNC?
> What is the use-case? What does multi-spindle G-code look like?
>


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[Emc-users] Multi-spindle machines

[andy pugh]

Has anyone here ever wanted multi-spindle support in LinuxCNC?
What is the use-case? What does multi-spindle G-code look like?

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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