Re: [Emc-users] Jerky jog in new 2.8 and 2.9 but not old 2.8 (onscreen buttons + mouse OK but not keyboard)

[Gene Heskett]

On Tuesday 07 July 2020 19:23:28 Phill Carter wrote:

> This post on the forum seemed to solve a similar issue.
>
> nc-2-9-jogging-velocity-fluctuations?start=10#165711>
>
That also makes perfect sense.  The stutter then is a false key-up before 
the next keydown. Somebody writing kbd software thought he was doing it 
right by making sure they stayed balanced. A pile of key-downs in the 
buffer would be guarded against just just because it seemed like the 
right thing to do.

But it still boils down to flaky hdwe. And its surprising to me that he 
found a way to control it on an individual key basis.  A play by play of 
how to do it would have been nice though.

> > On 8 Jul 2020, at 8:21 am, Gene Heskett 
> > wrote:
> >
> > On Tuesday 07 July 2020 17:25:21 andy pugh wrote:
> >> On Tue, 7 Jul 2020 at 22:14, N  wrote:
> >>> I do not consider it a big problem and will probably connect other
> >>> jogging method once machine is up and running but as it worked in
> >>> old version it would of course be good to get it perfect again.
> >>
> >> https://github.com/LinuxCNC/linuxcnc/commit/29f52a6e2be42f7785e965a
> >>700 2eaecf33f0b7aa#diff-5368256524ea7313310fa9c396bbbcf2
> >>
> >> Might have made a problem with a bouncy keyboard more obvious?
> >>
> >> Try reverting to e09ae64fb0a76355b4f559e28c91a29fb25af8ce and
> >> seeing if the behaviour changes.
> >>
> >> Is sounds like an easy problem to find, so a git bisect will
> >> probably work well (if i am allowed to mention git on the Users
> >> list)
> >
> > I'm moderately convinced the OP has flaky hdwe. I have only observed
> > this back when I was driving the sheldon with a pi3, and blamed the
> > occasional stutter on a traffic jam in the internal usb-2 hub since
> > all of that on the pi3 goes thru one internal hub.  Running the
> > exact same kernel on a pi4, I have not observed a stutter, ever.  On
> > the pi3 it was keyboard arrow keys only, mdi moves, or running
> > program code, zero stutters as that spi path doesn't go thru the
> > usb.  With the pi4, and its usb-3, its gone.
> >
> > I've not noted it on either of the D-525-MW mobo's, nor on an
> > elderly Dell that runs the GO704, but I believe all 3 of those have
> > more than one internal usb-2 hub.
> >
> > A good look at dmesg after a reboot would allow the number of hubs
> > to be discovered, and might be educational. I use (mostly logitek)
> > wireless keyboards and mice on everything.  And I'm surprised I
> > don't have problems with the Dell, as my portable house phones will
> > not work understandably within 10 feet of that Dell, its one old
> > noisy piece of junk, but it runs the mill just fine.
> >
> > 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)
> > If we desire respect for the law, we must first make the law
> > respectable. - Louis D. Brandeis
> > Genes Web page  > >
> >
> >
> > ___
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> > 
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> > 
>
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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)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


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Re: [Emc-users] Jerky jog in new 2.8 and 2.9 but not old 2.8 (onscreen buttons + mouse OK but not keyboard)

[Phill Carter]

This post on the forum seemed to solve a similar issue.



> On 8 Jul 2020, at 8:21 am, Gene Heskett  wrote:
> 
> On Tuesday 07 July 2020 17:25:21 andy pugh wrote:
> 
>> On Tue, 7 Jul 2020 at 22:14, N  wrote:
>>> I do not consider it a big problem and will probably connect other
>>> jogging method once machine is up and running but as it worked in
>>> old version it would of course be good to get it perfect again.
>> 
>> https://github.com/LinuxCNC/linuxcnc/commit/29f52a6e2be42f7785e965a700
>> 2eaecf33f0b7aa#diff-5368256524ea7313310fa9c396bbbcf2
>> 
>> Might have made a problem with a bouncy keyboard more obvious?
>> 
>> Try reverting to e09ae64fb0a76355b4f559e28c91a29fb25af8ce and seeing
>> if the behaviour changes.
>> 
>> Is sounds like an easy problem to find, so a git bisect will probably
>> work well (if i am allowed to mention git on the Users list)
> 
> I'm moderately convinced the OP has flaky hdwe. I have only observed this 
> back when I was driving the sheldon with a pi3, and blamed the 
> occasional stutter on a traffic jam in the internal usb-2 hub since all 
> of that on the pi3 goes thru one internal hub.  Running the exact same 
> kernel on a pi4, I have not observed a stutter, ever.  On the pi3 it was 
> keyboard arrow keys only, mdi moves, or running program code, zero 
> stutters as that spi path doesn't go thru the usb.  With the pi4, and 
> its usb-3, its gone.
> 
> I've not noted it on either of the D-525-MW mobo's, nor on an elderly 
> Dell that runs the GO704, but I believe all 3 of those have more than 
> one internal usb-2 hub.
> 
> A good look at dmesg after a reboot would allow the number of hubs to be 
> discovered, and might be educational. I use (mostly logitek) wireless 
> keyboards and mice on everything.  And I'm surprised I don't have 
> problems with the Dell, as my portable house phones will not work 
> understandably within 10 feet of that Dell, its one old noisy piece of 
> junk, but it runs the mill just fine.
> 
> 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)
> If we desire respect for the law, we must first make the law respectable.
> - Louis D. Brandeis
> Genes Web page  >
> 
> 
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> 

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Re: [Emc-users] Jerky jog in new 2.8 and 2.9 but not old 2.8 (onscreen buttons + mouse OK but not keyboard)

[Gene Heskett]

On Tuesday 07 July 2020 17:25:21 andy pugh wrote:

> On Tue, 7 Jul 2020 at 22:14, N  wrote:
> > I do not consider it a big problem and will probably connect other
> > jogging method once machine is up and running but as it worked in
> > old version it would of course be good to get it perfect again.
>
> https://github.com/LinuxCNC/linuxcnc/commit/29f52a6e2be42f7785e965a700
>2eaecf33f0b7aa#diff-5368256524ea7313310fa9c396bbbcf2
>
> Might have made a problem with a bouncy keyboard more obvious?
>
> Try reverting to e09ae64fb0a76355b4f559e28c91a29fb25af8ce and seeing
> if the behaviour changes.
>
> Is sounds like an easy problem to find, so a git bisect will probably
> work well (if i am allowed to mention git on the Users list)

I'm moderately convinced the OP has flaky hdwe. I have only observed this 
back when I was driving the sheldon with a pi3, and blamed the 
occasional stutter on a traffic jam in the internal usb-2 hub since all 
of that on the pi3 goes thru one internal hub.  Running the exact same 
kernel on a pi4, I have not observed a stutter, ever.  On the pi3 it was 
keyboard arrow keys only, mdi moves, or running program code, zero 
stutters as that spi path doesn't go thru the usb.  With the pi4, and 
its usb-3, its gone.

I've not noted it on either of the D-525-MW mobo's, nor on an elderly 
Dell that runs the GO704, but I believe all 3 of those have more than 
one internal usb-2 hub.

A good look at dmesg after a reboot would allow the number of hubs to be 
discovered, and might be educational. I use (mostly logitek) wireless 
keyboards and mice on everything.  And I'm surprised I don't have 
problems with the Dell, as my portable house phones will not work 
understandably within 10 feet of that Dell, its one old noisy piece of 
junk, but it runs the mill just fine.

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)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


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Re: [Emc-users] Jerky jog in new 2.8 and 2.9 but not old 2.8 (onscreen buttons + mouse OK but not keyboard)

[andy pugh]

On Tue, 7 Jul 2020 at 22:14, N  wrote:

> I do not consider it a big problem and will probably connect other jogging 
> method once machine is up and running but as it worked in old version it 
> would of course be good to get it perfect again.

https://github.com/LinuxCNC/linuxcnc/commit/29f52a6e2be42f7785e965a7002eaecf33f0b7aa#diff-5368256524ea7313310fa9c396bbbcf2

Might have made a problem with a bouncy keyboard more obvious?

Try reverting to e09ae64fb0a76355b4f559e28c91a29fb25af8ce and seeing
if the behaviour changes.

Is sounds like an easy problem to find, so a git bisect will probably
work well (if i am allowed to mention git on the Users list)

-- 
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, 1912


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Re: [Emc-users] Jerky jog in new 2.8 and 2.9 but not old 2.8 (onscreen buttons + mouse OK but not keyboard)

[N]

> On 07/06/2020 07:05 PM, Leonardo Marsaglia wrote:
> > One thing I find my wireless keyboard does sometimes is that a key can get
> > "sticky wirelessly". Mostly when I'm typing I sometimes get a ""
> > until It suddenly stops. I'm mostly using the keyboard for signing in and
> > modify the tool table etc, but since I'm using axis I sometimes think it
> > would be a good idea to deactivate the keyboard from axis to avoid
> > uncontrolled motion.
> >
> >
> PC keyboards have key-up and key-down messages.  if a key-up 
> message is lost by the wireless link, that will do what you 
> have seen.  in a high-electrical-noise environment like a 
> CNC machine, wireless keyboards and mice could be a problem.

A lost key up event would certainly be a problem.

Problem could be seen in halscope even if motor is powered so no extra 
electrical noise, turned up error to avoid following error. Tried a wired 
keyboard and still the same problem. Then using on real machine it however 
seemed to move rather smoothly, this might be because dynamic response is 
slower.

Tried and did not spot the problem in older version with either of the 
keyboards but found it with both keyboards in newer version. Mouse is OK so I 
suspect auto repeat.


I do not consider it a big problem and will probably connect other jogging 
method once machine is up and running but as it worked in old version it would 
of course be good to get it perfect again.


Nicklas Karlsson


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Re: [Emc-users] has anyone retrofitted through spindle coolant onto a cnc mill yet with a rotary union.

[andrew beck]

Awesome thanks Scott.

I looks like my spindle needs some seals inside it above pull stud to work
Aldo which I'm not sure about.

It's getting complicated lol.

Regards

Andrew

On Wed, Jul 8, 2020, 1:06 AM Scott Harwell via Emc-users <
emc-users@lists.sourceforge.net> wrote:

>  We used them at work. K used them on production equipment and I
> remember only one failure and that was only a slight leak.
> Scott
>
>
> On Tuesday, July 7, 2020, 2:07:01 AM CDT, andrew beck <
> andrewbeck0...@gmail.com> wrote:
>
>  scott.  have you used these much?  I can design something to make sure
> that
> the rotary union is not subjected to direct thrust that should be pretty
> easy.  Just wondering how simple the rotary unions are to install.  eg do
> I just have to make sure they are running concentric and plumb them up and
> away we go.I can see having a leak on top of the spindle could be a
> very bad idea for spindle bearings lol
>
> regards
>
> Andrew
>
> On Sun, Jul 5, 2020 at 2:09 AM Scott Harwell via Emc-users <
> emc-users@lists.sourceforge.net> wrote:
>
> >  Andy,
> > https://www.deublin.com/en/Product-Series?series=1101
> > Deublin units work well. The problem is tool retention design they will
> > not take direct thrust. They may have other products you can adapt.
> >
> > Scott
> >
> >On Saturday, July 4, 2020, 5:54:27 AM CDT, andrew beck <
> > andrewbeck0...@gmail.com> wrote:
> >
> >  Hey everyone  just wondering if anyone has ever used a rotary union to
> > plumb through spindle high pressure coolant into their machine.  I am
> > thinking about doing it and just looking for advice.  I have the high
> > pressure pump already and there is a hole down the middle of my
> spindle.  I
> > just need a rotary union I think and need to do some machining to make it
> > all fit..
> >
> > I have no idea what type of rotary union I need though
> >
> > regards
> >
> > Andrew
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
>
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Re: [Emc-users] Jerky jog in new 2.8 and 2.9 but not old 2.8 (onscreen buttons + mouse OK but not keyboard)

[Jon Elson]

On 07/06/2020 07:05 PM, Leonardo Marsaglia wrote:

One thing I find my wireless keyboard does sometimes is that a key can get
"sticky wirelessly". Mostly when I'm typing I sometimes get a ""
until It suddenly stops. I'm mostly using the keyboard for signing in and
modify the tool table etc, but since I'm using axis I sometimes think it
would be a good idea to deactivate the keyboard from axis to avoid
uncontrolled motion.


PC keyboards have key-up and key-down messages.  if a key-up 
message is lost by the wireless link, that will do what you 
have seen.  in a high-electrical-noise environment like a 
CNC machine, wireless keyboards and mice could be a problem.


Jon


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Re: [Emc-users] PCIe vs Ethernet Mesa card?

[Sam Sokolik]

I have been using mesa Ethernet cards from their inception.   I think I can
count on one hand the number of times linuxcnc couldn't find the card.  (
and they were probably my fault). Except for the really early days when you
had to build rt_preemp - I mostly use the linuxcnc stretch livecd for my
installs.  I am also using the 7i92 on the pi4 and don't remember it not
being found.

Sam

On Tue, Jul 7, 2020, 7:06 AM Ken Strauss  wrote:

> Possibly it is a DHCP timeout issue. The 7i92 has three choices for IP
> address: 192.168.1.121, BOOTP or configured in the EEPROM. The 192...
> address is the usual choice. Consider how the host determines the address
> if
> it is set using BOOTP.
>
> > -Original Message-
> > From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> > Sent: Monday, July 06, 2020 11:57 PM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] PCIe vs Ethernet Mesa card?
> >
> > Could the delay be caused by DHCP?  If the computer does a DHCP query and
> > does not find a DHCP server it will re-try perhaps many times.   The
> > solution would be "don't do that" and assign a fixed IP address.
> >
> > Has anyone actually tried using the same Ethernet for normal uses and
> > connected to Mesa at the same time or did you just assume it would not
> > work?   I wonder if a managed switch could make it work using a VLAN
> or
> > some other trick involving level of service priority
> >
> >
> >
> > On Mon, Jul 6, 2020 at 3:19 PM Jon Elson  wrote:
> >
> > > On 07/06/2020 03:51 PM, John Dammeyer wrote:
> > > >> From: andy pugh [mailto:bodge...@gmail.com]
> > > >> On Mon, 6 Jul 2020 at 21:22, Chris Albertson
> > 
> > > wrote:
> > > >>> Is there any advantage to using a bus connected Mesa card like the
> > > 6i25 vs
> > > >>> using one of the Ethernet-connected cards such as 7i92M or 7i93
> > > >> PCI might be more reliable. Not so much during runs, but at startup.
> > > >> It is quite easy to imagine something changing the network setup of
> > > >> your machine, and finding that you just can't get it to run.
> > > > No experience with the PCI cards but what I have noticed with my
> 7i92H
> > > is that after I boot and sign on into Linux it's important that I go
> and
> do
> > > something else for a few minutes.   Then come back and click on the
> icon
> > > that runs the actual LinuxCNC Axis program that uses the HAL file for
> the
> > > 7i92H.
> > > >
> > > > Seems otherwise the Ethernet connection to the 7i92H can't be found
> for
> > > the first few minutes.
> > > >
> > > > There may well be some parameter that can be set so the 7i92H
> Ethernet
> > > connection happens faster.
> > > >
> > > >
> > > This may be due to connmanctl trying to figure out what
> > > network is running on the port that is connected to the Mesa
> > > board.  There may be a way to tell connmanctl to not touch
> > > that port.
> > >
> > > Jon
> > >
> > >
> > > ___
> > > Emc-users mailing list
> > > Emc-users@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/emc-users
> > >
> >
> >
> > --
> >
> > Chris Albertson
> > Redondo Beach, California
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
>
>
>
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Re: [Emc-users] has anyone retrofitted through spindle coolant onto a cnc mill yet with a rotary union.

[Scott Harwell via Emc-users]

 We used them at work. K used them on production equipment and I remember 
only one failure and that was only a slight leak.
Scott


On Tuesday, July 7, 2020, 2:07:01 AM CDT, andrew beck 
 wrote:  
 
 scott.  have you used these much?  I can design something to make sure that
the rotary union is not subjected to direct thrust that should be pretty
easy.  Just wondering how simple the rotary unions are to install.  eg do
I just have to make sure they are running concentric and plumb them up and
away we go.    I can see having a leak on top of the spindle could be a
very bad idea for spindle bearings lol

regards

Andrew

On Sun, Jul 5, 2020 at 2:09 AM Scott Harwell via Emc-users <
emc-users@lists.sourceforge.net> wrote:

>  Andy,
> https://www.deublin.com/en/Product-Series?series=1101
> Deublin units work well. The problem is tool retention design they will
> not take direct thrust. They may have other products you can adapt.
>
> Scott
>
>    On Saturday, July 4, 2020, 5:54:27 AM CDT, andrew beck <
> andrewbeck0...@gmail.com> wrote:
>
>  Hey everyone  just wondering if anyone has ever used a rotary union to
> plumb through spindle high pressure coolant into their machine.  I am
> thinking about doing it and just looking for advice.  I have the high
> pressure pump already and there is a hole down the middle of my spindle.  I
> just need a rotary union I think and need to do some machining to make it
> all fit..
>
> I have no idea what type of rotary union I need though
>
> regards
>
> Andrew
>
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Re: [Emc-users] PCIe vs Ethernet Mesa card?

[Ken Strauss]

Possibly it is a DHCP timeout issue. The 7i92 has three choices for IP
address: 192.168.1.121, BOOTP or configured in the EEPROM. The 192...
address is the usual choice. Consider how the host determines the address if
it is set using BOOTP.

> -Original Message-
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> Sent: Monday, July 06, 2020 11:57 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] PCIe vs Ethernet Mesa card?
>
> Could the delay be caused by DHCP?  If the computer does a DHCP query and
> does not find a DHCP server it will re-try perhaps many times.   The
> solution would be "don't do that" and assign a fixed IP address.
>
> Has anyone actually tried using the same Ethernet for normal uses and
> connected to Mesa at the same time or did you just assume it would not
> work?   I wonder if a managed switch could make it work using a VLAN
or
> some other trick involving level of service priority
>
>
>
> On Mon, Jul 6, 2020 at 3:19 PM Jon Elson  wrote:
>
> > On 07/06/2020 03:51 PM, John Dammeyer wrote:
> > >> From: andy pugh [mailto:bodge...@gmail.com]
> > >> On Mon, 6 Jul 2020 at 21:22, Chris Albertson
> 
> > wrote:
> > >>> Is there any advantage to using a bus connected Mesa card like the
> > 6i25 vs
> > >>> using one of the Ethernet-connected cards such as 7i92M or 7i93
> > >> PCI might be more reliable. Not so much during runs, but at startup.
> > >> It is quite easy to imagine something changing the network setup of
> > >> your machine, and finding that you just can't get it to run.
> > > No experience with the PCI cards but what I have noticed with my 7i92H
> > is that after I boot and sign on into Linux it's important that I go and
do
> > something else for a few minutes.   Then come back and click on the icon
> > that runs the actual LinuxCNC Axis program that uses the HAL file for
the
> > 7i92H.
> > >
> > > Seems otherwise the Ethernet connection to the 7i92H can't be found
for
> > the first few minutes.
> > >
> > > There may well be some parameter that can be set so the 7i92H Ethernet
> > connection happens faster.
> > >
> > >
> > This may be due to connmanctl trying to figure out what
> > network is running on the port that is connected to the Mesa
> > board.  There may be a way to tell connmanctl to not touch
> > that port.
> >
> > Jon
> >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
>
>
> --
>
> Chris Albertson
> Redondo Beach, California
>
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Re: [Emc-users] Jerky jog in new 2.8 and 2.9 but not old 2.8 (onscreen buttons + mouse OK but not keyboard)

[N]

> One thing I find my wireless keyboard does sometimes is that a key can get
> "sticky wirelessly". Mostly when I'm typing I sometimes get a ""
> until It suddenly stops. I'm mostly using the keyboard for signing in and
> modify the tool table etc, but since I'm using axis I sometimes think it
> would be a good idea to deactivate the keyboard from axis to avoid
> uncontrolled motion.

Ordinary keyboard with cable is the same, older version jogged smoothly and 
mouse still do so I suspect auto repeat.

> I don't know if this is an easy task or if it requires recompiling or
> something.

Compiling is rather simple if/then problem have been found. Will try spot the 
problem using a diff on code.


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Re: [Emc-users] PCIe vs Ethernet Mesa card?

[Gene Heskett]

On Tuesday 07 July 2020 03:36:22 N wrote:

> > Could the delay be caused by DHCP?  If the computer does a DHCP
> > query and does not find a DHCP server it will re-try perhaps many
> > times.   The solution would be "don't do that" and assign a fixed IP
> > address.
>
> I have assigned static IP address and even so some kind of messages
> are sent periodically, it work well enough maybe even with margin but
> they are not supposed to be there.
>
> In an older version I had some kind of IP rule restricting access to
> ohters.
>
> > Has anyone actually tried using the same Ethernet for normal uses
> > and connected to Mesa at the same time or did you just assume it
> > would not work?   I wonder if a managed switch could make it
> > work using a VLAN or some other trick involving level of service
> > priority
>
> I have tried and it run well but are uncertain but guess there is
> nothing restricting Ethernet messages for other purposes interrupting
> these for machine. Guess the only good possibility here is two
> Ethernet cards and maybe some kind of IP rule to restrict access to
> others.
>
I have seen situations where the arp daemon was issueing "who has" 
queries frequently when that address isn't properly known to the system.
wireshark should catch the offender in any case.
>
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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)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


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Re: [Emc-users] PCIe vs Ethernet Mesa card?

[N]

> Could the delay be caused by DHCP?  If the computer does a DHCP query and
> does not find a DHCP server it will re-try perhaps many times.   The
> solution would be "don't do that" and assign a fixed IP address.

I have assigned static IP address and even so some kind of messages are sent 
periodically, it work well enough maybe even with margin but they are not 
supposed to be there.

In an older version I had some kind of IP rule restricting access to ohters.

> Has anyone actually tried using the same Ethernet for normal uses and
> connected to Mesa at the same time or did you just assume it would not
> work?   I wonder if a managed switch could make it work using a VLAN or
> some other trick involving level of service priority

I have tried and it run well but are uncertain but guess there is nothing 
restricting Ethernet messages for other purposes interrupting these for 
machine. Guess the only good possibility here is two Ethernet cards and maybe 
some kind of IP rule to restrict access to others.


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Re: [Emc-users] has anyone retrofitted through spindle coolant onto a cnc mill yet with a rotary union.

[andrew beck]

scott.  have you used these much?  I can design something to make sure that
the rotary union is not subjected to direct thrust that should be pretty
easy.   Just wondering how simple the rotary unions are to install.  eg do
I just have to make sure they are running concentric and plumb them up and
away we go.I can see having a leak on top of the spindle could be a
very bad idea for spindle bearings lol

regards

Andrew

On Sun, Jul 5, 2020 at 2:09 AM Scott Harwell via Emc-users <
emc-users@lists.sourceforge.net> wrote:

>  Andy,
> https://www.deublin.com/en/Product-Series?series=1101
> Deublin units work well. The problem is tool retention design they will
> not take direct thrust. They may have other products you can adapt.
>
> Scott
>
> On Saturday, July 4, 2020, 5:54:27 AM CDT, andrew beck <
> andrewbeck0...@gmail.com> wrote:
>
>  Hey everyone  just wondering if anyone has ever used a rotary union to
> plumb through spindle high pressure coolant into their machine.  I am
> thinking about doing it and just looking for advice.  I have the high
> pressure pump already and there is a hole down the middle of my spindle.  I
> just need a rotary union I think and need to do some machining to make it
> all fit..
>
> I have no idea what type of rotary union I need though
>
> regards
>
> Andrew
>
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Re: [Emc-users] has anyone retrofitted through spindle coolant onto a cnc mill yet with a rotary union.

[andrew beck]

hey everyone just replying now

andy yes I have normal ATC with a air cylinder and bevel washers.  I think
I could machine up everything required to allow a toolchange while still
letting the rotary union float on top of the spindle.

my problem is i don't know what rotary union to buy.  which is what I am
really asking about.

On Sun, Jul 5, 2020 at 4:02 AM Thomas J Powderly  wrote:

> You can look at gun drills ( very little to do with guns, but very much
> high pressure drilling )
>
> Used in mold shops for deep coolant holes. They cut straight and fast.
>
> If you blow a coolant line on these its dangerous.
>
> the drill doesnt look like those in your toolbox
>
> wayback machine has
>
>
> https://web.archive.org/web/20161102005306/http://www.unisig.com/information-and-resources/what-is-deep-hole-drilling/what-is-gun-drilling/
>
> hth tomp
>
> On 7/4/20 9:06 PM, Scott Harwell via Emc-users wrote:
> >   Andy,
> > https://www.deublin.com/en/Product-Series?series=1101
> > Deublin units work well. The problem is tool retention design they will
> not take direct thrust. They may have other products you can adapt.
> >
> > Scott
> >
> >  On Saturday, July 4, 2020, 5:54:27 AM CDT, andrew beck <
> andrewbeck0...@gmail.com> wrote:
> >
> >   Hey everyone  just wondering if anyone has ever used a rotary union to
> > plumb through spindle high pressure coolant into their machine.  I am
> > thinking about doing it and just looking for advice.  I have the high
> > pressure pump already and there is a hole down the middle of my
> spindle.  I
> > just need a rotary union I think and need to do some machining to make it
> > all fit..
> >
> > I have no idea what type of rotary union I need though
> >
> > regards
> >
> > Andrew
> >
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