Re: [Emc-users] Thing with a square hole.

[Gregg Eshelman]

Use a rotary broach. The cutters can be found at reasonable prices. The holders 
tend to be stupid expensive. Fortunately there's plenty of DIY info on how to 
build your own.
--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Thing with a square hole.

[andy pugh]

On 20 March 2017 at 17:43, John Figie  wrote:
> I just saw this last week.  Hemingway kits has a compact rotary broach
> kit.  I am not sure if it can handle a 10mm square.

That was my next plan. AvE has a very quick and dirty variant on Youtube too.

But for this project, buying them seems more sensible.

-- 
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

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Thing with a square hole.

[John Figie]

I just saw this last week.  Hemingway kits has a compact rotary broach
kit.  I am not sure if it can handle a 10mm square.

https://youtu.be/O2glVyU0_C0

John

On Mar 20, 2017 12:03 PM, "Jon Elson"  wrote:

> On 03/20/2017 10:26 AM, andy pugh wrote:
> > On 20 March 2017 at 14:37, Dave Caroline 
> wrote:
> >> you dont need space for an edm machine the fella down the road
> >> probably accepts folding paper, price depends on qty, I get taps burnt
> >> out for a tenner
> > Well, I just found some with a google search I haven't tried before,
> > and  found these at £14 each and decided to save some time and
> > trouble.
> > http://www.gatemachinery.com/product/cam-d1-4
> > (£8 + VAT + £12.50 fixed-rate postage)
> >
> Ummm, that's a VERY good deal!
>
> Jon
>
> 
> --
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>
--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Thing with a square hole.

[Jon Elson]

On 03/20/2017 10:26 AM, andy pugh wrote:
> On 20 March 2017 at 14:37, Dave Caroline  wrote:
>> you dont need space for an edm machine the fella down the road
>> probably accepts folding paper, price depends on qty, I get taps burnt
>> out for a tenner
> Well, I just found some with a google search I haven't tried before,
> and  found these at £14 each and decided to save some time and
> trouble.
> http://www.gatemachinery.com/product/cam-d1-4
> (£8 + VAT + £12.50 fixed-rate postage)
>
Ummm, that's a VERY good deal!

Jon

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Thing with a square hole.

[andy pugh]

On 20 March 2017 at 14:37, Dave Caroline  wrote:
> you dont need space for an edm machine the fella down the road
> probably accepts folding paper, price depends on qty, I get taps burnt
> out for a tenner

Well, I just found some with a google search I haven't tried before,
and  found these at £14 each and decided to save some time and
trouble.
http://www.gatemachinery.com/product/cam-d1-4
(£8 + VAT + £12.50 fixed-rate postage)

-- 
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

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Thing with a square hole.

[Gene Heskett]

On Monday 20 March 2017 10:19:49 andy pugh wrote:

> On 20 March 2017 at 14:14, Dave Caroline  
wrote:
> > probably easiest to EDM the square
>
> I would need to find space for the EDM machine.

I do EDM on my little HF mill Andy. But I connect the EDN power wires so 
the currant doesn't have to flow thru the spindle bearings. Most of the 
time I either use a small wire, which is a pain keeping it on target as 
it burns away, or for bigger holes a brass tube, both spinning so theres 
enough jiggle to keep it from sticking.

Or the last time, I mounted a 3" diameter brass disk about .0325" thick, 
and used it as a saw blade to cut a bored hole, already taper threaded, 
think pipe thread but 50 tpi, so I had 6 metal petals the nut could 
squeeze down onto a piece of ball screw. It might as well be welded, and 
that was the idea.  Crossfeed screw for this old Sheldon I'm converting.  

The off intended use of the end tapering of the g76 was used for that.  
Discussed on this list at the time.

For this, I'd mill the shape on a carbon stick long enough you could 
afford the length loss when you face the end square to get fresh, sharp 
corners, and drill a central hole so you could pump fresh 
distilled/deionized water into the gap for debris flushing. The central 
post left by the dielectric flushing hole can be milled off easily 
enough when the needed depth has been reached.

A smaller, but still square carbon rod could also be driven in a square 
pattern in the xy at a high enough rate to circulate the water for 
debris control, while descending a few microns per loop would also work 
and wouldn't leave the hole sticking up. Turn off path blending of 
course. I've not tried that on my small mill as its still doing SW 
stepping at about a 8 to 10 ipm rate, and probably not fast enough to 
circulate the water well. I need to get off my duff and put a 5i25 card 
in it.  And another 12 to 15 volts of motor voltage so it can move. 

Shoemakers kids comes to mind. :(

Tomp can advise how much power you would need to get a decent erosion 
rate.  The most I've ever used in a purely rc circuit was 80 volts and 
about 3 amps into some 1/4" OD brass tubing to drill some holes in an 
Avanti table saw blade, so I could mount it to a rotary table and 
sharpen it. 10 uf discharge cap, a huge paper/oil transmitter spare, and 
2 50 ohm 200 watt r's in parallel for an rc discharge.  Noisy, you could 
hear it for blocks & I put my -30db shooting muffs on.  But it also made 
those holes in the saw blade in about 15 minutes a hole. 

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 

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Thing with a square hole

[John Alexander Stewart]

Andy -

The guys at the shop where I last worked beside used to slightly grind the
flutes of a standard end mill, leaving (say) 6mm of flute length for
cutting pockets.

That way, the "higher up" flutes did not re-cut swarf, and thus deflect the
tool, and there was no tool rubbing on the higher up sections, either.

They cut many complex shapes used in space, air, water, and underground, so
they were well worth asking for advice.

Maybe that would do for you?
--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Thing with a square hole.

[Dave Caroline]

you dont need space for an edm machine the fella down the road
probably accepts folding paper, price depends on qty, I get taps burnt
out for a tenner

Dave

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Thing with a square hole.

[Ken Strauss]

It won't be quite square but how about drilling small (1mm?) holes in the 
corners, milling out the centre and cleaning up with a small endmill? It will 
be at least as good as a typical 3/8-inch socket.

> -Original Message-
> From: John Kasunich [mailto:jmkasun...@fastmail.fm]
> Sent: Monday, March 20, 2017 10:21 AM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Thing with a square hole.
>
> You could mill a 10mm wide x 5mm deep slot in two rectangular bars, then
> silver-braze them together.
> Might not be strong enough, depends on if the OD is big enough to leave a
> reasonable joint area.
> Welding would probably leave a hardened zone and be miserable to machine
> afterwards.
>
> John
>
>
> On Mon, Mar 20, 2017, at 09:58 AM, andy pugh wrote:
> > I want to make some D1-4 cams for a 4th-axis project.
> > These need a 10mm square hole (but 3/8 would be fine too).
> > I don't think I can polygon-bore a square, it needs too much
> > tool-relief. (I guess I should try, though).
> >
> > If I could find something like a 3/8" drive socket with no hole in it
> > that would be a good starting point. Any ideas?
> >
> > I have thought of having a hex hole and starting from an M24 grub
> > screw (setscrew). But those cost about the same as an actual cam.
> > (though the only source of cams I have found in the UK have no stock,
> > or I would have bought them).
> > http://spares.xyzmachinetools.com/XYZ-TRAINER-1330-1340/products/29/
> > lists zero stock at £7.77
> >
> >
> > --
> > 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
> >
> > --
> >  Check out the vibrant tech community on one of the world's
> > most engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
>
> --
>   John Kasunich
>   jmkasun...@fastmail.fm
>
> --
> Check out the vibrant tech community on one of the world's most engaging
> tech sites, Slashdot.org! http://sdm.link/slashdot
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users



--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Thing with a square hole.

[John Kasunich]

You could mill a 10mm wide x 5mm deep slot in two rectangular bars, then 
silver-braze them together.
Might not be strong enough, depends on if the OD is big enough to leave a 
reasonable joint area.
Welding would probably leave a hardened zone and be miserable to machine 
afterwards.

John


On Mon, Mar 20, 2017, at 09:58 AM, andy pugh wrote:
> I want to make some D1-4 cams for a 4th-axis project.
> These need a 10mm square hole (but 3/8 would be fine too).
> I don't think I can polygon-bore a square, it needs too much
> tool-relief. (I guess I should try, though).
> 
> If I could find something like a 3/8" drive socket with no hole in it
> that would be a good starting point. Any ideas?
> 
> I have thought of having a hex hole and starting from an M24 grub
> screw (setscrew). But those cost about the same as an actual cam.
> (though the only source of cams I have found in the UK have no stock,
> or I would have bought them).
> http://spares.xyzmachinetools.com/XYZ-TRAINER-1330-1340/products/29/
> lists zero stock at £7.77
> 
> 
> -- 
> 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
> 
> --
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users


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

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Thing with a square hole.

[andy pugh]

On 20 March 2017 at 14:14, Dave Caroline  wrote:
> probably easiest to EDM the square

I would need to find space for the EDM machine.

-- 
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

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Thing with a square hole.

[andy pugh]

On 20 March 2017 at 14:09, Eric Keller  wrote:
> make a square broach? https://www.youtube.com/watch?v=MYI1slVGziU

It's a blind hole (and needs to be).

I have thought about making a wobble-broach.

-- 
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

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Thing with a square hole.

[Dave Caroline]

probably easiest to EDM the square

Dave Caroline

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

Re: [Emc-users] Thing with a square hole.

[Eric Keller]

make a square broach? https://www.youtube.com/watch?v=MYI1slVGziU

On Mon, Mar 20, 2017 at 9:58 AM, andy pugh  wrote:
> I want to make some D1-4 cams for a 4th-axis project.
> These need a 10mm square hole (but 3/8 would be fine too).
> I don't think I can polygon-bore a square, it needs too much
> tool-relief. (I guess I should try, though).
>
> If I could find something like a 3/8" drive socket with no hole in it
> that would be a good starting point. Any ideas?
>
> I have thought of having a hex hole and starting from an M24 grub
> screw (setscrew). But those cost about the same as an actual cam.
> (though the only source of cams I have found in the UK have no stock,
> or I would have bought them).
> http://spares.xyzmachinetools.com/XYZ-TRAINER-1330-1340/products/29/
> lists zero stock at £7.77
>
>
> --
> 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
>
> --
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

[Emc-users] Thing with a square hole.

[andy pugh]

I want to make some D1-4 cams for a 4th-axis project.
These need a 10mm square hole (but 3/8 would be fine too).
I don't think I can polygon-bore a square, it needs too much
tool-relief. (I guess I should try, though).

If I could find something like a 3/8" drive socket with no hole in it
that would be a good starting point. Any ideas?

I have thought of having a hex hole and starting from an M24 grub
screw (setscrew). But those cost about the same as an actual cam.
(though the only source of cams I have found in the UK have no stock,
or I would have bought them).
http://spares.xyzmachinetools.com/XYZ-TRAINER-1330-1340/products/29/
lists zero stock at £7.77


-- 
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

--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

[Emc-users] 2.8 pre interpreter ignoring commands during pure python M6 remap

[Bevins, Bob]

Hi,

We are trying to get a remap done purely in python and we are running into an 
issue in that the interpreter is ignoring our commands. We know the interpreter 
is receiving them because if we send it a bad gcode command, it will spit at us 
that the gcode is invalid. We tested the status right before we send it a 
command and it returns idle. We tried with mdi command and with the execute 
command and in both cases ti just ignores us and continues on like it has made 
the move and everything is valid. Well, that reeks havoc if we let it go, cause 
it will think it is where it is suppose to be and drop the tool thinking 
everything is ok.

Below is the commands we are sending it. We have not done any tracing to find 
out what the interpreter is doing internally frankly because we just don't know 
how... But what we do know is it ignores our commands.

def ok_for_mdi(self):
self.stat.poll()
return not self.stat.estop and self.stat.enabled and self.stat.homed 
and _
  (self.stat.interp_state == self.cnc.INTERP_IDLE)


if self.ok_for_mdi():
 self.command.mode(self.cnc.MODE_MDI)
 self.command.wait_complete() # wait until mode switch executed
   self.command.mdi("G1 G53 F%d X%f Y%f Z0.0" % 
(self.feedSpeed, posX, posY))
Here we are checking to see if it is ok to send mdi commands and the command 
gets sent... IGNORED

So we try with execute:

self.execute("G1 G53 F%d X%f Y%f" % (10, 20.0, -9.0))
The command gets sent.. IGNORED

We checked the status of the interpreter before we send the command and it is 
IDLE.

stat.interp_state == linuxcnc.INTERP_IDLE
stat.task_mode == linuxcnc.MODE_MANUAL

INI file:
[RS274NGC]
REMAP=M6 modalgroup=6 prolog=change_prolog python=change_remap 
epilog=change_epilog


We spent all weekend working on this and are back at square one with no 
results. The manual clearly states the remapping can be done purely in python 
and we tested exactly what the manual says to do also to no prevail.


What are we doing wrong?

Thanks in advance  for any help, would greatly appreciate it.




Bob Bevins
Senior Technical Service Specialist

Allegion Canada Inc.
9450 Henri-Bourassa Ouest
Montréal, QC, H4S 1N8
Office / Bureau: 514.385.0005
Mobile / Portable: 514.231.6241
Email / Courriel: bob.bev...@allegion.com

[ALLE_RGB_V]


The information contained in this message is privileged and intended only for 
the
recipients named. If the reader is not a representative of the intended 
recipient,
any review, dissemination or copying of this message of the information it 
contains
is prohibited. If you have received this message in error, please notify the 
sender
and delete the original email and any attachments.

L'information contenue dans ce message est strictement confidentielle et est à 
l'usage
exclusif de son destinataire. Si le lecteur n'est pas un représentant du 
destinataire indiqué ou prévu,
il est strictement interdit de consulter, reproduire ou distribuer ce message 
et les renseignements
qu'il contient.  Si vous avez reçu cette communication par erreur, veuillez 
aviser l'expéditeur
immédiatement et supprimez ce message ainsi que tous documents en pièces 
jointes.


--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users

[Emc-users] Emc setup

[Johann Beukes]

Hi Guys
Can someone help me with the nr of Prof Rudy du Preez please, I have
difficulty setting up my machine?
Thanks.
--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users