[Emc-users] My noise problem, continued.

[Gene Heskett]

In bringing this thing slowly back to life, I found a goodly bit of the 
noise this evening.

In the process of adding my single bolt ground, I had grounded the Z 
drives - rail from the psu by putting a 3" piece of wire that was handy 
leftovers, in the - rail of the driver, then clipped it to a run of 
braid about 4" from the bolt.  Totally bad dog as it was injecting about 
2.5 volts of noise into the run of braid headed for the lid of the box 
and the 7i90 & pi lived. I had a stray wire about that same length 
sticking off the bolt, so I wire nutted those two together. 2.5 volts of 
noise all over the lid stuff became 300 mv.

Thinking about that after the fact, I am wondering if an even better idea 
might be to put a pair of .1 mylars in series across the drivers power 
rail inputs, and take the junction of the two caps down to that bolt.  
Balancing the line so to speak.

Comments?

So now I am down to hooking it all back up. But I am having a heck of a 
time making good crimps that will plug into the 10 pair plastic headers.  
The tool mostly works although its leaving the pin squeezed a bit wide 
where the crimp is, and that makes it hell to get it pushed into the 
header plug, but theres no place to grip the female pin and crimp it at 
the same time. But I'm slowly learning how to partially close the 
crimper so it sort of gets a grip on the pin, and then insert the wire.  
Need younger, less arthritic fingers I think. :) But tomorrow should get 
me back to where I was 10 days ago.  With home & limit switches yet to 
install.

Cheers, Gene Heskett
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Stuart Stevenson]

Several times I have milled threads (both internal and external) with a
lathe ID threading tool. Instead of a single row this would be called a
single tooth thread mill.
Put it in an end mill adapter and voila you have a thread mill. You can
mill whatever pitch you can program and whatever diameter you can program.
easy peasy!

On Fri, Feb 3, 2017 at 8:57 PM, Jon Elson  wrote:

> On 02/03/2017 11:23 AM, Bengt Sjölund wrote:
> > Take a moment and think again ;)  It is a single row tool.
> > /Bengt
> >
> >
> > Den 2017-02-03 kl. 18:05, skrev Jon Elson:
> >> tool into a chunk of material at the thread pitch feedrate.
> >
> OK, you drill it down the center of the hole at a slow feed,
> and the thread milling teeth open the diameter up quite a
> bit more than the shank diameter.  Then, you deflect to the
> side and thread mill coming back up.  I've never run into a
> tool of this type before. I've used single-row thread mills,
> and use combo drill-taps a lot. Always something new!
>
> Jon
>
> 
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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Jon Elson]

On 02/03/2017 11:23 AM, Bengt Sjölund wrote:
> Take a moment and think again ;)  It is a single row tool.
> /Bengt
>
>
> Den 2017-02-03 kl. 18:05, skrev Jon Elson:
>> tool into a chunk of material at the thread pitch feedrate.
>
OK, you drill it down the center of the hole at a slow feed, 
and the thread milling teeth open the diameter up quite a 
bit more than the shank diameter.  Then, you deflect to the 
side and thread mill coming back up.  I've never run into a 
tool of this type before. I've used single-row thread mills, 
and use combo drill-taps a lot. Always something new!

Jon

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Re: [Emc-users] z...@lakeweb.net

[Jon Elson]

On 02/03/2017 11:11 AM, Jon Elson wrote:
> On 02/03/2017 09:43 AM, Dan Bloomquist wrote:
>>
>> Hi Jon,
>> A complete diagram would be neat if I ever had to repair 
>> one of these. I
>> did finally find a 38 page manual with partial diagrams.
>>
>> 
>>
>> Is that the same one you have? I'm ok with this one.
>>
>
OK, you mail server will only accept mail messages up to 360 
KB!!
So, here it is on my web server :

http://pico-systems.com/Manuals/ServoDynamics_1525.pdf

Mine is clearer, and has the schematic page folded out so 
you can see the whole page.

Jon

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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Jon Elson]

On 02/03/2017 10:37 AM, Valerio Bellizzomi wrote:
> On Fri, 2017-02-03 at 16:21 +, andy pugh wrote:
>> On 3 February 2017 at 16:13, Valerio Bellizzomi  wrote:
>>> I would like to know where to buy one tool to do that. :-)
>>
>> http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.Xthread+mill.TRS0&_nkw=thread+mill&_sacat=0
>>
>
> they look like standard taps :-)
>
Yes, but they have no helix.  All the teeth in one row are 
in a ring, not forming a thread.

Jon

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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Jon Elson]

On 02/03/2017 10:13 AM, Valerio Bellizzomi wrote:
> I would like to know where to buy one tool to do that. :-) 
> I am starting to build a new cnc machine, when finished I 
> will need one of those tools.
Not clear what tool you are asking for.  Micro 100 makes 
single-row thread milling cutters, and I have been very 
happy with mine.

Jon

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Re: [Emc-users] Tool holder threads?

[Gene Heskett]

On Friday 03 February 2017 17:01:57 Todd Zuercher wrote:

> Does anyone here know if it is possible or practical to salvage a tool
> holder that the threads have gotten messed up on? We have a Techniks
> HSK63F tool holder that some how got buggered up to the point I
> couldn't hardly get the nut off. The 1st 3 threads on the nut are
> galled up pretty bad. The things cost about $350, so I thought it
> might be worth asking. Unfortunately we are a wood working shop so I
> don't have any metal working machines, so I'll be stuck with sending
> this out to get done (if there is anything to be done.) Here is what
> it looks like.
> https://s28.postimg.org/e4ip0y57x/0203171628.jpg
>
Thats a bear Todd.  But I can't see the threads in the nut all that well. 
I get the impression the external threads on the tool holder are 
displaced/stretched toward the right, 1/4 of the thread maybe, or am I 
seeing things?  I  would also want to comment that at its size, 90 lb/ft 
is going to stress it eventually.  Like cracking concrete floors, the 
question isn't if, but when.

> Next question, Any guesses why it would have gone bad? We always
> tighten the nuts at a workbench with a torque wrench, to 90ft/lbs, so
> I don't think it was ever over torqued.

I might want to put some never-seize on it, and run the nut on a little 
farther with no tool in it to see if the nut can iron it back into 
shape.  But if I'm seeing what I think I'm seeing, you might have to 
reach for the card.

What type of torque wrench?  The bending beam type can hold its accuracy 
for a century or 2, as long as the root of the beam is still solidly 
mounted in the socket driver hub, all you have to do is bend the needle 
back to zero if somebody mucks it up.  The clicker/breakaway types, even 
if they cost 5x the bending beam version, and impress the frogs because 
they scream both precision and money, ought to be checked yearly, or 
more frequently. I've seen them off far enough that it wasn't the wrench 
clicking, but $3 each con rod bolts as he was torqueing them up. Turned 
out it wasn't breaking when set for 65 lb/ft, until the beam type said 
107 lb/ft. Expensive lesson for that mechanic because an engine he had 
just done came back on a tow hook, pan wasn't big enough for all the 
parts. He had to eat it of course, starting with a clean block.

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] Tool holder threads?

[john mcintyre]

Good day ,

We also have problems with hardened threads if they are  tightened up

without lubrication, we use the  stainless steel anti seize  paste.

Just a thin smear is all that is required .

The male thread, we have cleaned up with a small hand grinder, pita.

Usually the nut has to be replaced.

 john



From: Todd Zuercher 
Sent: Saturday, 4 February 2017 9:01 AM
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] Tool holder threads?

Does anyone here know if it is possible or practical to salvage a tool holder 
that the threads have gotten messed up on? We have a Techniks HSK63F tool 
holder that some how got buggered up to the point I couldn't hardly get the nut 
off. The 1st 3 threads on the nut are galled up pretty bad. The things cost 
about $350, so I thought it might be worth asking. Unfortunately we are a wood 
working shop so I don't have any metal working machines, so I'll be stuck with 
sending this out to get done (if there is anything to be done.)
Here is what it looks like.
https://s28.postimg.org/e4ip0y57x/0203171628.jpg

Next question, Any guesses why it would have gone bad? We always tighten the 
nuts at a workbench with a torque wrench, to 90ft/lbs, so I don't think it was 
ever over torqued.



--



Todd Zuercher
mailto:zuerc...@embarqmail.com


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[https://s28.postimg.org/e4ip0y57x/0203171628.jpg]
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Re: [Emc-users] Tool holder threads?

[Ed]

On 02/03/2017 04:01 PM, Todd Zuercher wrote:
> Does anyone here know if it is possible or practical to salvage a tool holder 
> that the threads have gotten messed up on? We have a Techniks HSK63F tool 
> holder that some how got buggered up to the point I couldn't hardly get the 
> nut off. The 1st 3 threads on the nut are galled up pretty bad. The things 
> cost about $350, so I thought it might be worth asking. Unfortunately we are 
> a wood working shop so I don't have any metal working machines, so I'll be 
> stuck with sending this out to get done (if there is anything to be done.)
> Here is what it looks like.
> https://s28.postimg.org/e4ip0y57x/0203171628.jpg
>
> Next question, Any guesses why it would have gone bad? We always tighten the 
> nuts at a workbench with a torque wrench, to 90ft/lbs, so I don't think it 
> was ever over torqued.
>
>
>
If your threads are dry they will gall. Any light lube will help. Any 
competent shop should be able to clean them up.

They will need a good carbide threading tool.

Ed.


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Re: [Emc-users] Tool holder threads?

[andy pugh]

On 3 February 2017 at 22:01, Todd  Zuercher
 wrote:
> Does anyone here know if it is possible or practical to salvage a tool holder 
> that the threads have gotten messed up on?

Not easily.

You could re-machine the socket (deeper) and take the damaged threads off.

I think that building up with weld and re-machining would probably
deform the conical bore.

You have little to lose by machining the holder in-situ on the
machine. Dremel (or similar) and a move in Z and Y at the (ER?) taper
angle.

This is Skunkworks doing the same thing with his actual machine taper.
https://www.youtube.com/watch?v=2BFTifZgQVs

Damage might have been caused by cranking down the nut without first
engaging the collet in the nut.

(ie, tool in collet, collet in holder, nut on top. That doesn't work.
(assuming ER collet))

-- 
atp
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designed for the especial use of mechanical geniuses, daredevils and
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Re: [Emc-users] VFD recommendations, pyprofibus?

[Chris Morley]

I believe it's Mitsubishi's own. It's similar to modbus. I have run A500 and 
E700 series. They are basically the same E series allows more status

- Reply message -
From: "Nicklas Karlsson" 
To: "Enhanced Machine Controller (EMC)" 
Subject: [Emc-users] VFD recommendations, pyprofibus?
Date: Fri, Feb 3, 2017 12:44 PM



It would of course be a very good idea to add, do you happen to know which 
protocol it use? Or what mitsubishe name it?

On Fri, 3 Feb 2017 18:53:09 +
Chris Morley  wrote:

>
> No I wrote a python HAL program that used the serial port. I used a converter 
> to convert from rs232 to 485.I referenced Mitsubishi papers for the protocol. 
> I can add it to linuxcnc if anyone is interested.
>
> Chris M
>
> - Reply message -
> From: "Nicklas Karlsson" 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: [Emc-users] VFD recommendations, pyprofibus?
> Date: Fri, Feb 3, 2017 8:43 AM
>
>
>
> pyprofibus?
>
>
> On Fri, 3 Feb 2017 02:02:23 +
> Chris Morley  wrote:
>
> > I use mitsubishi VFDs particularly the e700 series.
> >
> > They use a rs-485 serial connection.
> >
> > I have a python program to communicate with them.
> >
> >
> > I've also toyed with a Yaskawa drive with Classicladder over modbus.
> >
> >
> > These are expensive drives to buy new, but can be found on Ebay.
> >
> > Just other options available.
> >
> >
> > Chris M
> >
> > 
> > From: dragon 
> > Sent: February 2, 2017 2:35 AM
> > To: Enhanced Machine Controller (EMC)
> > Subject: [Emc-users] VFD recommendations
> >
> > I want to start looking for VFDs for my lathe and mill conversions. I
> > have two 2hp 3 phase motors to use for the spindles. Of course if I came
> > across a 3hp for the lathe some day it might get upgraded.
> >
> > Are there any drawbacks to using MODBUS instead of the usual analog 10v
> > interface?
> >
> > Does anyone have suggestions for particular brands or models of VFD? I
> > have worked with several Hitachi and one Toshiba VFD but that is all.
> > Remember that these are home/hobby machines and I do need to try to keep
> > costs down, but I don't want to be penny wise and pound foolish either.
> >
> > Thanks!
> >
> > --
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Re: [Emc-users] 6I24 PCI or 7I80 Ethernet?

[Andrew]

2017-02-03 23:42 GMT+02:00 Gene Heskett:

> Run the gpio port in .is_output, .open_drain mode, thats two setp
> statements in your hal file, feed your +5 volts to all the stepper
> driver + terminals, and your chosen output pin to the minus terminal of
> the opto input on the stepper.  Duplicate that for direction. Don't
> forget to set the signaling times in the .ini file. It should just work.
> Does on my 7i90HD anyway.
>

Great, thanks for the advice!
I've also purchased 7i90 recently to use with Pi 2.
Haven't touched it yet, though.
Are you satisfied with your Pi / 7i90 set?

Andrew
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Re: [Emc-users] 6I24 PCI or 7I80 Ethernet?

[Peter C. Wallace]

On Sat, 4 Feb 2017, Andrew wrote:

> Date: Sat, 4 Feb 2017 00:00:11 +0200
> From: Andrew 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: Re: [Emc-users] 6I24 PCI or 7I80 Ethernet?
> 
> 2017-02-03 23:05 GMT+02:00 Peter C. Wallace:
>
>> You need a RS-422 interface to connect a sserial device to the FPGA, so
>> 7I44,
>> 7I52, 7I47, 7I47S, or RS-422 interface chip on a little board like our
>> 485X1
>> for just one channel
>>
>
>
>> But if you only have the OPTO racks and the step/dir pins, you should not
>> need
>> and sserial I/O expansion (unless it makes wiring easier to have the OPTO22
>> interface at some distance from the 7I80)
>>
>
> Yes, I think I don't really need sserial...
>
>
>> If its sinking current, yes, you can get 5V swings (so OK for drives with
>> common +5 on the Opto inputs) if sourcing, it can only swing to 3.3V or so
>> which is not so good.
>>
>
> Good for me, the desired drives have common +5V.
>
>>
>> Note that if you use bare FPGA I/O, a single wiring mistake will ruin your
>> day...
>>
>
> Sure, that's a risk...
> I would take 7i47S if I needed an analog output... or 7i47 if I needed
> encoders.
> 7i42TA would do the job either?
All would work

The 7I42 is just a I/O protector so doesnt change the FPGA drive capability
but will protect the FPGA I/O from mistakes up to +-12V

>
>
> Andrew
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Peter Wallace
Mesa Electronics

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Re: [Emc-users] 6I24 PCI or 7I80 Ethernet?

[Andrew]

2017-02-03 23:05 GMT+02:00 Peter C. Wallace:

> You need a RS-422 interface to connect a sserial device to the FPGA, so
> 7I44,
> 7I52, 7I47, 7I47S, or RS-422 interface chip on a little board like our
> 485X1
> for just one channel
>


> But if you only have the OPTO racks and the step/dir pins, you should not
> need
> and sserial I/O expansion (unless it makes wiring easier to have the OPTO22
> interface at some distance from the 7I80)
>

Yes, I think I don't really need sserial...


> If its sinking current, yes, you can get 5V swings (so OK for drives with
> common +5 on the Opto inputs) if sourcing, it can only swing to 3.3V or so
> which is not so good.
>

Good for me, the desired drives have common +5V.

>
> Note that if you use bare FPGA I/O, a single wiring mistake will ruin your
> day...
>

Sure, that's a risk...
I would take 7i47S if I needed an analog output... or 7i47 if I needed
encoders.
7i42TA would do the job either?


Andrew
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[Emc-users] Tool holder threads?

[Todd Zuercher]

Does anyone here know if it is possible or practical to salvage a tool holder 
that the threads have gotten messed up on? We have a Techniks HSK63F tool 
holder that some how got buggered up to the point I couldn't hardly get the nut 
off. The 1st 3 threads on the nut are galled up pretty bad. The things cost 
about $350, so I thought it might be worth asking. Unfortunately we are a wood 
working shop so I don't have any metal working machines, so I'll be stuck with 
sending this out to get done (if there is anything to be done.) 
Here is what it looks like. 
https://s28.postimg.org/e4ip0y57x/0203171628.jpg 

Next question, Any guesses why it would have gone bad? We always tighten the 
nuts at a workbench with a torque wrench, to 90ft/lbs, so I don't think it was 
ever over torqued. 



-- 

 

Todd Zuercher 
mailto:zuerc...@embarqmail.com 

 
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Re: [Emc-users] 6I24 PCI or 7I80 Ethernet?

[Gene Heskett]

On Friday 03 February 2017 15:53:11 Andrew wrote:

> 2017-02-03 22:41 GMT+02:00 Peter C. Wallace:
> > Yes, you can use OPTO22 racks with any of our 50 pin FPGA cards
> > (except the 4I68 since its I/O is not 5V tolerant). If you have a
> > lot of OPTO 22 racks, a
> > 7I90HD can be used as a sserial remote and drive 3x 24 I/O racks
>
> Thanks Peter.
> I looked at 7I69 too, because the machine has 2 extra opto22 racks
> (but they're almost empty).
>
> I guess 7i80hd_16_st12.bit should fit?
> Does it support sserial? How do I connect sserial board to 7i80HD,
> just in case?
>
> Also, is 7i80HD output voltage enough to drive an optocouple in a
> stepper drive?
>
> Andrew

Run the gpio port in .is_output, .open_drain mode, thats two setp 
statements in your hal file, feed your +5 volts to all the stepper 
driver + terminals, and your chosen output pin to the minus terminal of 
the opto input on the stepper.  Duplicate that for direction. Don't 
forget to set the signaling times in the .ini file. It should just work.  
Does on my 7i90HD anyway.


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Re: [Emc-users] VFD recommendations, pyprofibus?

[Gene Heskett]

On Friday 03 February 2017 13:53:09 Chris Morley wrote:

> No I wrote a python HAL program that used the serial port. I used a
> converter to convert from rs232 to 485.I referenced Mitsubishi papers
> for the protocol. I can add it to linuxcnc if anyone is interested.
>
> Chris M

Please do Chris.  I went out on a limb and bought a 5 pack of 
usb<->rs-485 gismo's thinking I could use them to talk to the VFD I have 
on the Sheldon.

Sure.  Unforch, its a fake VFD, and despite a full, every bolt teardown, 
there is not a rs-485 port anyplace on its pcb's. So I have one of these 
things hanging on a 10 foot USB cable plugged into the Dell running the 
G0704, and wondering what to do with it, although it does make a decent 
night light. :)

However, given the limitations of programming it from the front panel, it 
runs from a 10 volt signal from a SpinX1 just fine. I'm running the 
7i90's PWMGEN in PDM mode, smooth as silk with the only noticeable lag 
being the startup lag of about 1.5 seconds because the current safety 
stop, its too slow, is only about 1/2 Hz below the first step of 100 
revs, no back gear and 1st gear in the belts, stop is maybe .75 seconds 
from 200 hundred revs. I haven't measured the m3/m4/m3 vs any real speed 
above 100 revs yet. I don't want to unscrew that 7.75" chuck. :(  But I 
have a clamp for that about half made when I blew up the 7i90, so thats 
the rest of the first swarf project/test. I have it rewired except for 
the stuff that plugs into the 7i90 as of about 20 minutes ago. I'll have 
to finish the 7i90 i/o wiring before I can power any of the motors as I 
put a couple 40 Amp SSR's, to be controlled by LCNC's 
motion.motion-enable signal, in series with everything but the 5 volts 
for the pi & 7i90. I put a 20 amp Brick Wall filter at the line input of 
the VFD, and a big ferrite clamp-on at the output of it, and ANYthing 
carrying switch mode power is now either in well shielded and single 
bolt grounded cable, or in well gripped for shielding continuity, 
conduit or BX.

Next is go kill the main breaker for it in the service, mount the new 
7i90, and see if I can control the SSR's.

But its getting on toward nose bag time, so I better go see what the 
better half wants for dinner. :)

[...]

Thanks Chris M.

Cheers, Gene Heskett
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Re: [Emc-users] 6I24 PCI or 7I80 Ethernet?

[Peter C. Wallace]

On Fri, 3 Feb 2017, Andrew wrote:

> Date: Fri, 3 Feb 2017 22:53:11 +0200
> From: Andrew 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: Re: [Emc-users] 6I24 PCI or 7I80 Ethernet?
> 
> 2017-02-03 22:41 GMT+02:00 Peter C. Wallace:
>
>> Yes, you can use OPTO22 racks with any of our 50 pin FPGA cards (except the
>> 4I68 since its I/O is not 5V tolerant). If you have a lot of OPTO 22
>> racks, a
>> 7I90HD can be used as a sserial remote and drive 3x 24 I/O racks
>>
>
> Thanks Peter.
> I looked at 7I69 too, because the machine has 2 extra opto22 racks (but
> they're almost empty).
>
> I guess 7i80hd_16_st12.bit should fit?
> Does it support sserial? How do I connect sserial board to 7i80HD, just in
> case?

You need a RS-422 interface to connect a sserial device to the FPGA, so 7I44, 
7I52, 7I47, 7I47S, or RS-422 interface chip on a little board like our 485X1 
for just one channel

But if you only have the OPTO racks and the step/dir pins, you should not need 
and sserial I/O expansion (unless it makes wiring easier to have the OPTO22 
interface at some distance from the 7I80)
>
> Also, is 7i80HD output voltage enough to drive an optocouple in a stepper
> drive?


If its sinking current, yes, you can get 5V swings (so OK for drives with 
common +5 on the Opto inputs) if sourcing, it can only swing to 3.3V or so 
which is not so good.

Note that if you use bare FPGA I/O, a single wiring mistake will ruin your 
day...

>
> Andrew
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Peter Wallace
Mesa Electronics

(\__/)
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Re: [Emc-users] 6I24 PCI or 7I80 Ethernet?

[Andrew]

2017-02-03 22:41 GMT+02:00 Peter C. Wallace:

> Yes, you can use OPTO22 racks with any of our 50 pin FPGA cards (except the
> 4I68 since its I/O is not 5V tolerant). If you have a lot of OPTO 22
> racks, a
> 7I90HD can be used as a sserial remote and drive 3x 24 I/O racks
>

Thanks Peter.
I looked at 7I69 too, because the machine has 2 extra opto22 racks (but
they're almost empty).

I guess 7i80hd_16_st12.bit should fit?
Does it support sserial? How do I connect sserial board to 7i80HD, just in
case?

Also, is 7i80HD output voltage enough to drive an optocouple in a stepper
drive?

Andrew
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Re: [Emc-users] 6I24 PCI or 7I80 Ethernet?

[Peter C. Wallace]

On Fri, 3 Feb 2017, Andrew wrote:

> Date: Fri, 3 Feb 2017 22:23:52 +0200
> From: Andrew 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: Re: [Emc-users] 6I24 PCI or 7I80 Ethernet?
> 
> 2017-01-14 17:20 GMT+02:00 John Thornton :
>
>> The cool thing about the 5/5i24 is you can connect an Opto 22 base to
>> one port and have a lot of I/O.
>>
>
> I encountered a 30-year-old machine with two opto22 boards (24 channels
> each, IDC50 connectors) and 3 steppers.
> So I'm thinking 7i80HD. Should it work as is with the opto22 boards?
>
> Thanks,
> Andrew
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Yes, you can use OPTO22 racks with any of our 50 pin FPGA cards (except the 
4I68 since its I/O is not 5V tolerant). If you have a lot of OPTO 22 racks, a 
7I90HD can be used as a sserial remote and drive 3x 24 I/O racks

Peter Wallace
Mesa Electronics

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Re: [Emc-users] VFD recommendations, pyprofibus?

[Nicklas Karlsson]

It would of course be a very good idea to add, do you happen to know which 
protocol it use? Or what mitsubishe name it?

On Fri, 3 Feb 2017 18:53:09 +
Chris Morley  wrote:

> 
> No I wrote a python HAL program that used the serial port. I used a converter 
> to convert from rs232 to 485.I referenced Mitsubishi papers for the protocol. 
> I can add it to linuxcnc if anyone is interested.
> 
> Chris M
> 
> - Reply message -
> From: "Nicklas Karlsson" 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: [Emc-users] VFD recommendations, pyprofibus?
> Date: Fri, Feb 3, 2017 8:43 AM
> 
> 
> 
> pyprofibus?
> 
> 
> On Fri, 3 Feb 2017 02:02:23 +
> Chris Morley  wrote:
> 
> > I use mitsubishi VFDs particularly the e700 series.
> >
> > They use a rs-485 serial connection.
> >
> > I have a python program to communicate with them.
> >
> >
> > I've also toyed with a Yaskawa drive with Classicladder over modbus.
> >
> >
> > These are expensive drives to buy new, but can be found on Ebay.
> >
> > Just other options available.
> >
> >
> > Chris M
> >
> > 
> > From: dragon 
> > Sent: February 2, 2017 2:35 AM
> > To: Enhanced Machine Controller (EMC)
> > Subject: [Emc-users] VFD recommendations
> >
> > I want to start looking for VFDs for my lathe and mill conversions. I
> > have two 2hp 3 phase motors to use for the spindles. Of course if I came
> > across a 3hp for the lathe some day it might get upgraded.
> >
> > Are there any drawbacks to using MODBUS instead of the usual analog 10v
> > interface?
> >
> > Does anyone have suggestions for particular brands or models of VFD? I
> > have worked with several Hitachi and one Toshiba VFD but that is all.
> > Remember that these are home/hobby machines and I do need to try to keep
> > costs down, but I don't want to be penny wise and pound foolish either.
> >
> > Thanks!
> >
> > --
> > Check out the vibrant tech community on one of the world's most
> > engaging tech sites, SlashDot.org! http://sdm.link/slashdot
> > ___
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Re: [Emc-users] 6I24 PCI or 7I80 Ethernet?

[Andrew]

2017-01-14 17:20 GMT+02:00 John Thornton :

> The cool thing about the 5/5i24 is you can connect an Opto 22 base to
> one port and have a lot of I/O.
>

I encountered a 30-year-old machine with two opto22 boards (24 channels
each, IDC50 connectors) and 3 steppers.
So I'm thinking 7i80HD. Should it work as is with the opto22 boards?

Thanks,
Andrew
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Re: [Emc-users] VFD recommendations, pyprofibus?

[Sebastian Kuzminsky]

On 02/03/2017 11:53 AM, Chris Morley wrote:
>
> No I wrote a python HAL program that used the serial port. I used a
> converter to convert from rs232 to 485.I referenced Mitsubishi papers
> for the protocol. I can add it to linuxcnc if anyone is interested.

I think it would be a good addition (especially if it has a manpage).

If it's just adding a driver, without messing too much with any existing 
stuff, then please add it to 2.7.


-- 
Sebastian Kuzminsky

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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Valerio Bellizzomi]

Thanks


Valerio Bellizzomi




On Fri, 2017-02-03 at 10:50 -0600, Jon Elson wrote:
> On 02/03/2017 01:59 AM, Valerio Bellizzomi wrote:
> > http://www.infodelta.it/foto/film/filettatura%20interpolata.mp4
> >
> >
> This is thread milling.  You use a cutter that looks sort of 
> like a tap, but the rows of teeth are actually rings, not a 
> helix.  You place the tool into a hole that is large enough 
> for it to pass straight through, and then move toward the 
> side and preform a helical move.  Generally, you plunge 
> straight to the bottom of the hole and then make the helix 
> back out in Z,
> this climb mills the thread.  You make slightly more than 
> one turn of the helical move, and the entire hole is threaded.
> 
> Pretty much all modern CNC controls can do helical 
> interpolation.
> 
> thread mills are expensive tools, and can only do one thread 
> pitch, although they can be used for a range of thread 
> diameters.  There is an alternative, a single row thread 
> mill.  This can do a wide range of thread pitches, but as it 
> only has one row of teeth, you need to make the helix follow 
> the entire number of turns of the thread. But, for special 
> threads where you don't have either a conventional tap or a 
> thread mill, and can't fit the part in a lathe, it can make 
> it possible to put the thread in.
> 
> Jon
> 
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Re: [Emc-users] VFD recommendations

[Chris Morley]

Modbus worked fine enough for testing.Speed and direction is all I was 
controlling. It was quite a while ago that I did this.

Chris M

- Reply message -
From: "Andrew" 
To: "Enhanced Machine Controller (EMC)" 
Subject: [Emc-users] VFD recommendations
Date: Fri, Feb 3, 2017 8:42 AM



2017-02-03 4:02 GMT+02:00 Chris Morley:

> I've also toyed with a Yaskawa drive with Classicladder over modbus.
>

Was it a success?
I have a few Yaskawa VFDs so I would be interested in some details.


Andrew
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Re: [Emc-users] VFD recommendations, pyprofibus?

[Chris Morley]

No I wrote a python HAL program that used the serial port. I used a converter 
to convert from rs232 to 485.I referenced Mitsubishi papers for the protocol. I 
can add it to linuxcnc if anyone is interested.

Chris M

- Reply message -
From: "Nicklas Karlsson" 
To: "Enhanced Machine Controller (EMC)" 
Subject: [Emc-users] VFD recommendations, pyprofibus?
Date: Fri, Feb 3, 2017 8:43 AM



pyprofibus?


On Fri, 3 Feb 2017 02:02:23 +
Chris Morley  wrote:

> I use mitsubishi VFDs particularly the e700 series.
>
> They use a rs-485 serial connection.
>
> I have a python program to communicate with them.
>
>
> I've also toyed with a Yaskawa drive with Classicladder over modbus.
>
>
> These are expensive drives to buy new, but can be found on Ebay.
>
> Just other options available.
>
>
> Chris M
>
> 
> From: dragon 
> Sent: February 2, 2017 2:35 AM
> To: Enhanced Machine Controller (EMC)
> Subject: [Emc-users] VFD recommendations
>
> I want to start looking for VFDs for my lathe and mill conversions. I
> have two 2hp 3 phase motors to use for the spindles. Of course if I came
> across a 3hp for the lathe some day it might get upgraded.
>
> Are there any drawbacks to using MODBUS instead of the usual analog 10v
> interface?
>
> Does anyone have suggestions for particular brands or models of VFD? I
> have worked with several Hitachi and one Toshiba VFD but that is all.
> Remember that these are home/hobby machines and I do need to try to keep
> costs down, but I don't want to be penny wise and pound foolish either.
>
> Thanks!
>
> --
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> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Bengt Sjölund]

Take a moment and think again ;)  It is a single row tool.
/Bengt


Den 2017-02-03 kl. 18:05, skrev Jon Elson:
> tool into a chunk of material at the thread pitch feedrate.


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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Jon Elson]

On 02/03/2017 07:25 AM, TJoseph Powderly wrote:
> very nice idea, bore & thread with 1 tool
> but i _thought_
> "this puts a lot of work on the lead edge, and the circular
> interpolation avoided that"
> but then i read that it was meant for non-ferrous materials
> so no heart attack
> until
> i read the price... 62Euro!?
>
>
Oh, I missed the part about the boring.  I didn't take the 
time to puzzle through the German text.

I'm sure I paid the equivalent of about 62 Euro for my Micro 
100 single-row thread mill.  And, I have not gotten my money 
out of it, yet.  It is slow, but for a piece that is hard to 
fit or locate in the lathe, and you have no tap for that 
combination of diameter and thread pitch, there's no other 
way to do it.  So, I'm happy to have it.

I'm a bit skeptical about plunging a spindly little 62 Euro 
tool into a chunk of material at the thread pitch feedrate.
I know how that works out on $8 combo drill-taps.  
(snap-crunch).  I do love the combo drill taps, though, for 
spotting-drilling-tapping thinner materials with one tool.  
It does take a spindle reversal at the bottom, but that is 
no big deal.
I generally drill at 1000 RPM and feed of 3 IPM until the 
tip breaks through, then back up and engage the G33.1 cycle 
to thread the hole. Just a couple seconds per hole.

Jon

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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Jon Elson]

On 02/03/2017 05:53 AM, Bengt Sjölund wrote:
>
> https://shop.vhf.de/articleGroups/Circular-thread-cutters-W_GW_BGF.htm
>
> I am very fond of the one above = 2 tools in 1
>
>
Yes, that is called a single-row thread mill in the US.

Jon

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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Jon Elson]

On 02/03/2017 05:28 AM, andy pugh wrote:
> On 3 February 2017 at 11:19, Valerio Bellizzomi  wrote:
>> With this interpolated motion there is no need for spindle reversal when
>> tapping
> Yes, but, unless there is something very clever going on in those
> animations, you need a cutting tool with zero lead.
> I am about 80% convinced that you can#t do it with a standard tap.
>
Absolutely correct.  these thread mills have rows of cutting 
teeth, that are not on a helix.

Jon

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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Jon Elson]

On 02/03/2017 05:19 AM, Valerio Bellizzomi wrote:
> With this interpolated motion there is no need for spindle reversal when
> tapping
>
> it is also faster as the tool can move out from the hole rapidly
>
Right, the typical cycle is you plunge down the center of 
the hole, move to the side, helix up one turn, move back to 
the center and pull straight up.  it can be a very fast cycle.

Jon

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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Jon Elson]

On 02/03/2017 05:06 AM, TJoseph Powderly wrote:
> i've not done it with linuxcnc
> we did it a lot in heidenhain tnc controls for sink edm
The 6th program described here :  
http://pico-systems.com/gcode.html
writes the G-code to do arbitrary thread milling moves.  It 
was written specifically for LinuxCNC, but should work on 
most CNC controls.  You can download the C source code or a 
DOS executable for this.  It can write the code for either 
single-row or conventional thread mills.

Jon

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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Jon Elson]

On 02/03/2017 01:59 AM, Valerio Bellizzomi wrote:
> http://www.infodelta.it/foto/film/filettatura%20interpolata.mp4
>
>
This is thread milling.  You use a cutter that looks sort of 
like a tap, but the rows of teeth are actually rings, not a 
helix.  You place the tool into a hole that is large enough 
for it to pass straight through, and then move toward the 
side and preform a helical move.  Generally, you plunge 
straight to the bottom of the hole and then make the helix 
back out in Z,
this climb mills the thread.  You make slightly more than 
one turn of the helical move, and the entire hole is threaded.

Pretty much all modern CNC controls can do helical 
interpolation.

thread mills are expensive tools, and can only do one thread 
pitch, although they can be used for a range of thread 
diameters.  There is an alternative, a single row thread 
mill.  This can do a wide range of thread pitches, but as it 
only has one row of teeth, you need to make the helix follow 
the entire number of turns of the thread. But, for special 
threads where you don't have either a conventional tap or a 
thread mill, and can't fit the part in a lathe, it can make 
it possible to put the thread in.

Jon

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Re: [Emc-users] VFD recommendations

[Nicklas Karlsson]

I also have two yaskawa drives but are working on replacing them, I got them 
running but need to get parameters correct.


On Fri, 3 Feb 2017 18:36:15 +0200
Andrew  wrote:

> 2017-02-03 4:02 GMT+02:00 Chris Morley:
> 
> > I've also toyed with a Yaskawa drive with Classicladder over modbus.
> >
> 
> Was it a success?
> I have a few Yaskawa VFDs so I would be interested in some details.
> 
> 
> Andrew
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Re: [Emc-users] VFD recommendations, pyprofibus?

[Nicklas Karlsson]

pyprofibus?


On Fri, 3 Feb 2017 02:02:23 +
Chris Morley  wrote:

> I use mitsubishi VFDs particularly the e700 series.
> 
> They use a rs-485 serial connection.
> 
> I have a python program to communicate with them.
> 
> 
> I've also toyed with a Yaskawa drive with Classicladder over modbus.
> 
> 
> These are expensive drives to buy new, but can be found on Ebay.
> 
> Just other options available.
> 
> 
> Chris M
> 
> 
> From: dragon 
> Sent: February 2, 2017 2:35 AM
> To: Enhanced Machine Controller (EMC)
> Subject: [Emc-users] VFD recommendations
> 
> I want to start looking for VFDs for my lathe and mill conversions. I
> have two 2hp 3 phase motors to use for the spindles. Of course if I came
> across a 3hp for the lathe some day it might get upgraded.
> 
> Are there any drawbacks to using MODBUS instead of the usual analog 10v
> interface?
> 
> Does anyone have suggestions for particular brands or models of VFD? I
> have worked with several Hitachi and one Toshiba VFD but that is all.
> Remember that these are home/hobby machines and I do need to try to keep
> costs down, but I don't want to be penny wise and pound foolish either.
> 
> Thanks!
> 
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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Valerio Bellizzomi]

On Fri, 2017-02-03 at 16:21 +, andy pugh wrote:
> On 3 February 2017 at 16:13, Valerio Bellizzomi  wrote:
> > I would like to know where to buy one tool to do that. :-)
> 
> 
> http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.Xthread+mill.TRS0&_nkw=thread+mill&_sacat=0
> 


they look like standard taps :-)





Valerio Bellizzomi


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Re: [Emc-users] VFD recommendations

[Andrew]

2017-02-03 4:02 GMT+02:00 Chris Morley:

> I've also toyed with a Yaskawa drive with Classicladder over modbus.
>

Was it a success?
I have a few Yaskawa VFDs so I would be interested in some details.


Andrew
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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Gene Heskett]

On Friday 03 February 2017 08:40:43 andy pugh wrote:

> On 3 February 2017 at 13:25, TJoseph Powderly  wrote:
> > until
> > i read the price... 62Euro!?
>
> Stolen from someone else's web site:
>
> "A terrifying ordeal
>
> Much as one might try (and I did!), it is virtually impossible to cut
> a thread in Ti using a tap.
>
> This led to several problems with the M2X0.4 bolt threads in the rods.
> I don’t have a an M2X0.4 threadmill, there hasn’t been one on EBay in
> over 2 years, they cost about 130 quid new, the shank is so bloody
> thin it looks like it would break as soon as it touched anything and
>  the FP2 won’t do helical interpolation in the Y axis / horizontal
> spindle. I had to bite the bullet and order a threadmill from Isacr in
> the end. I then had to sit down and write a section in the post
> processor to take care if the helical interpolation in different tool
> planes. To see that tiny cutter disappearing up a 1.6mm hole for the
> first time was indeed a terrifying ordeal!"

I can well imagine, I had goosebumps the first time I stuck an 0-80 
conventional tap into the hole,  The hole was in A2, but was in OOTB 
condition. Having 3 holes to tap at the time, I ordered 3 taps. I did 
manage to break one with some stupid code later, but have since tapped 
at least 20 more holes in mild steel, and probably 100 or more in 
micarta.  And still have 2 taps left. :)

Cheers, Gene Heskett
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[andy pugh]

On 3 February 2017 at 16:13, Valerio Bellizzomi  wrote:
> I would like to know where to buy one tool to do that. :-)


http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.Xthread+mill.TRS0&_nkw=thread+mill&_sacat=0

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designed for the especial use of mechanical geniuses, daredevils and
lunatics."
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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Valerio Bellizzomi]

On Fri, 2017-02-03 at 10:40 -0500, Gene Heskett wrote:
> On Friday 03 February 2017 02:59:21 Valerio Bellizzomi wrote:
> 
> > http://www.infodelta.it/foto/film/filettatura%20interpolata.mp4
> 
> We can already do that, if we had the tap tool. And it would be a great 
> way but there will always be some tightening of the fit toward the 
> bottom of the hole due to tool flex if using the longer conventional tap 
> form.  I liked that short, only 2 or 3 cutting teeth in the last section 
> of the video.
> 
> Use a G2 or G3, with z and p calculated to do the correct pitch. I have a 
> single groove, 6 HSS teeth at a time tool, but I've not used it, its 
> 3/4" in diameter but I've not needed a tapped hole that big, yet.  
> Someday...
> 
> If Delta was trying to make us jealous?  Nah, couldn't happen. :) But 
> where do we source tooling optimized for that?
> 
> Cheers, Gene Heskett



I would like to know where to buy one tool to do that. :-)

I am starting to build a new cnc machine, when finished I will need one
of those tools.



Valerio Bellizzomi



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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Gene Heskett]

On Friday 03 February 2017 06:28:08 andy pugh wrote:

> On 3 February 2017 at 11:19, Valerio Bellizzomi  
wrote:
> > With this interpolated motion there is no need for spindle reversal
> > when tapping
>
> Yes, but, unless there is something very clever going on in those
> animations, you need a cutting tool with zero lead.
> I am about 80% convinced that you can#t do it with a standard tap.

You couldn't Andy. Unless you could somehow synchronize the spindle with 
the g2/g3 motion so it always presented the same cutting edge to the 
cut.  But with a single point, multi-toothed tool, tapping a BIG hole is 
just some math. I have a tool but its minimum hole size for the start 
would likely be at least 100mm as its about .7500" across its tips.  Any 
smaller than that and the threads would be widened by the tips of the 
cutter swinging into and back out of max diameter of the threads. That, 
for a decent thread, whole require the hole diameter to be at least 5x 
its diameter. Either that, or have the spindle mounted on some sort of a 
circle wobulator so the lead was simulated by tipping the spindle in 
time with the circular progression.

Those tools in the video were obviously without any lead IOW.  And likely 
not a 60 degree v.

Cheers, Gene Heskett
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] VFD recommendations

[Sebastian Kuzminsky]

On 02/03/2017 07:34 AM, dragon wrote:
> I just re-read this... If modbus is correctly implemented in the GT
> series, could you just use MB2HAL?

I think the Huanyang GT VFD should talk to any Modbus Master, including 
MB2HAL.


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Re: [Emc-users] Fwd: Re: Eagle mill retro fit

[Dan Bloomquist]

Jon Elson wrote:
>
> Servo Dynamics used to have  a legacy products section that
> had the manuals (not a complete circuit diagram, but did
> have the diagram of the input section, which is what you
> need to make the connections). Some of these manuals may
> still be floating around on the web.  I do have a copy of
> this manual (1525) saved in pdf format, I could send it to you.

Hi Jon,
A complete diagram would be neat if I ever had to repair one of these. I 
did finally find a 38 page manual with partial diagrams.



Is that the same one you have? I'm ok with this one.
Thanks, Dan.



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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Gene Heskett]

On Friday 03 February 2017 02:59:21 Valerio Bellizzomi wrote:

> http://www.infodelta.it/foto/film/filettatura%20interpolata.mp4

We can already do that, if we had the tap tool. And it would be a great 
way but there will always be some tightening of the fit toward the 
bottom of the hole due to tool flex if using the longer conventional tap 
form.  I liked that short, only 2 or 3 cutting teeth in the last section 
of the video.

Use a G2 or G3, with z and p calculated to do the correct pitch. I have a 
single groove, 6 HSS teeth at a time tool, but I've not used it, its 
3/4" in diameter but I've not needed a tapped hole that big, yet.  
Someday...

If Delta was trying to make us jealous?  Nah, couldn't happen. :) But 
where do we source tooling optimized for that?

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] VFD recommendations

[dragon]

I just re-read this... If modbus is correctly implemented in the GT
series, could you just use MB2HAL?



On 02/02/2017 10:51 AM, Sebastian Kuzminsky wrote:
> On 02/02/2017 09:34 AM, Kirk Wallace wrote:
>> On 02/02/2017 07:02 AM, Sebastian Kuzminsky wrote:
>>
>> ... snip
>>
>>> 2.  The LinuxCNC Huanyang driver only works with the older style of
>>> Huanyang VFDs.  It does not work with the newer GT-series models.  I'm
>>> working on a new driver for Huanyang GT VFDs, but it's not ready yet.
>>
>>
>> Did you have a plan or an overview of the update. I could look at it so
>> then two of us probably won't get around to it.
> 
> The GT-series use a totally different wire protocol from the earlier 
> non-GT VFDs.  Huanyang's manuals calls both protocols "Modbus", but the 
> older non-GT VFD protocol is definitely not Modbus, it's some unique 
> protocol Huanyang made up.  It was reverse engineered by someone named 
> "scotta" on CNC Zone, for which we owe a debt of gratitude.
> 
> The Huanyang GT-series VFDs implement Modbus correctly, so they will be 
> much easier to write a driver for.
> 
> The VFD we got unfortunately lacked the switch on the circuit board that 
> enables Modbus ("SW1"), instead it had a jumper wire there disabling 
> Modbus.  Wat.  After communicating with Huanyang we desoldered this 
> jumper wire and soldered it back in the "enable Modbus" position, and 
> that got it communicating.
> 
> So now it's just a small matter of programming, and writing some docs on 
> how to modify the hardware to allow it to communicate via Modbus.  I 
> should have something ready for testing in a few weeks.
> 
> Those Huanyang VFDs sure are inexpensive, but they're also the most 
> wonky and obstinate VFDs I've ever worked with.
> 
> 



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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Bengt Sjölund]

Not OK for bottom threaded holes ;)
/Bengt


Den 2017-02-03 kl. 14:25, skrev TJoseph Powderly:
> well its a lot more than the old draps and dreamers
> http://www.dreamertool.com/drapreg.html
>
> tomp tjtr33


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Re: [Emc-users] VFD recommendations

[dragon]

If you think that a driver is doable and not far off, it probably
doesn't really matter which version I get. For my use I could just
manually control spindle speed until the driver is ready.


On 02/02/2017 04:21 PM, Sebastian Kuzminsky wrote:
> On 02/02/2017 03:04 PM, dragon wrote:
>> how do you tell the difference between the older models and the GT series?
>>
>> I don't see an actual model number on most of the ebay listings
> 
> I think you have to ask the seller.
> 
> The VFD we got came with a manual that says "Huyanyang GT-series" on the 
> front cover, that was our first clue that the old hy_vfd driver might 
> not work.
> 
> The manual says that the name plate on the VFD will have a model number 
> that begins with "GT-", but our VFD had no name plate.
> 
> 



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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[andy pugh]

On 3 February 2017 at 13:25, TJoseph Powderly  wrote:
> until
> i read the price... 62Euro!?

Stolen from someone else's web site:

"A terrifying ordeal

Much as one might try (and I did!), it is virtually impossible to cut
a thread in Ti using a tap.

This led to several problems with the M2X0.4 bolt threads in the rods.
I don’t have a an M2X0.4 threadmill, there hasn’t been one on EBay in
over 2 years, they cost about 130 quid new, the shank is so bloody
thin it looks like it would break as soon as it touched anything and
 the FP2 won’t do helical interpolation in the Y axis / horizontal
spindle. I had to bite the bullet and order a threadmill from Isacr in
the end. I then had to sit down and write a section in the post
processor to take care if the helical interpolation in different tool
planes. To see that tiny cutter disappearing up a 1.6mm hole for the
first time was indeed a terrifying ordeal!"

-- 
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] Does anybody know about this interpolated tapping ?

[TJoseph Powderly]

very nice idea, bore & thread with 1 tool
but i _thought_
"this puts a lot of work on the lead edge, and the circular 
interpolation avoided that"
but then i read that it was meant for non-ferrous materials
so no heart attack
until
i read the price... 62Euro!?

well its a lot more than the old draps and dreamers
http://www.dreamertool.com/drapreg.html

tomp tjtr33

On 02/03/17 18:53, Bengt Sjölund wrote:
> https://shop.vhf.de/catalogs/Thread-cutters-W_GW.htm
>
> https://shop.vhf.de/articleGroups/Circular-thread-cutters-W_GW_BGF.htm
>
> I am very fond of the one above = 2 tools in 1
>
> Cheers
> Bengt
>

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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Bengt Sjölund]

https://shop.vhf.de/catalogs/Thread-cutters-W_GW.htm

https://shop.vhf.de/articleGroups/Circular-thread-cutters-W_GW_BGF.htm

I am very fond of the one above = 2 tools in 1

Cheers
Bengt


Den 2017-02-03 kl. 12:46, skrev Valerio Bellizzomi:
> On Fri, 2017-02-03 at 11:28 +, andy pugh wrote:
>> On 3 February 2017 at 11:19, Valerio Bellizzomi  wrote:
>>> With this interpolated motion there is no need for spindle reversal when
>>> tapping
>> Yes, but, unless there is something very clever going on in those
>> animations, you need a cutting tool with zero lead.
>> I am about 80% convinced that you can#t do it with a standard tap.
>>
>>
>>
>
> It needs a special tool
>
> http://www.infodelta.it/foto/Filettatura%20interpolata.jpg
>
>
>
>
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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Valerio Bellizzomi]

On Fri, 2017-02-03 at 11:28 +, andy pugh wrote:
> On 3 February 2017 at 11:19, Valerio Bellizzomi  wrote:
> > With this interpolated motion there is no need for spindle reversal when
> > tapping
> 
> Yes, but, unless there is something very clever going on in those
> animations, you need a cutting tool with zero lead.
> I am about 80% convinced that you can#t do it with a standard tap.
> 
> 
> 


It needs a special tool

http://www.infodelta.it/foto/Filettatura%20interpolata.jpg




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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[andy pugh]

On 3 February 2017 at 11:19, Valerio Bellizzomi  wrote:
> With this interpolated motion there is no need for spindle reversal when
> tapping

Yes, but, unless there is something very clever going on in those
animations, you need a cutting tool with zero lead.
I am about 80% convinced that you can#t do it with a standard tap.



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designed for the especial use of mechanical geniuses, daredevils and
lunatics."
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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[Valerio Bellizzomi]

With this interpolated motion there is no need for spindle reversal when
tapping

it is also faster as the tool can move out from the hole rapidly




On Fri, 2017-02-03 at 18:06 +0700, TJoseph Powderly wrote:
> i've not done it with linuxcnc
> we did it a lot in heidenhain tnc controls for sink edm
> 
> google thread milling
> 
> you need a tool with the correct pitch on smaller shank than the drilled 
> hole
> 
> how the metal is attacked can be:
>   goto to the bottom before interpolating an expanding circle
> or
>   helix down at the desired radius
> 
> multiple passes can do roughing and finishing
> 
> Linuxcnc has the primitives to do this
> this is an application not a special motion ( afaict )
> 
> the problem in sink edm was that the leading edge of the tool wore out 
> quickly if the tapping was plunged
> versus
> if the path was interpolated (expanded laterally from center),
>   then the tool wear was evenly distributed over the tool face
> 
> i'd think the same advantages occur in chip machining
> 
> also a larger cutting interface occurs ( not a single leading point )
> 
> it was a real advantage when making large diameter threaded plugs ( > 
> 100mm dia )
> and its really simple program
> 
> tomp tjtr33
> 
> 
> 
> On 02/03/17 14:59, Valerio Bellizzomi wrote:
> > http://www.infodelta.it/foto/film/filettatura%20interpolata.mp4
> >
> >
> >
> >
> >
> >
> > --
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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[TJoseph Powderly]

i've not done it with linuxcnc
we did it a lot in heidenhain tnc controls for sink edm

google thread milling

you need a tool with the correct pitch on smaller shank than the drilled 
hole

how the metal is attacked can be:
  goto to the bottom before interpolating an expanding circle
or
  helix down at the desired radius

multiple passes can do roughing and finishing

Linuxcnc has the primitives to do this
this is an application not a special motion ( afaict )

the problem in sink edm was that the leading edge of the tool wore out 
quickly if the tapping was plunged
versus
if the path was interpolated (expanded laterally from center),
  then the tool wear was evenly distributed over the tool face

i'd think the same advantages occur in chip machining

also a larger cutting interface occurs ( not a single leading point )

it was a real advantage when making large diameter threaded plugs ( > 
100mm dia )
and its really simple program

tomp tjtr33



On 02/03/17 14:59, Valerio Bellizzomi wrote:
> http://www.infodelta.it/foto/film/filettatura%20interpolata.mp4
>
>
>
>
>
>
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Re: [Emc-users] Does anybody know about this interpolated tapping ?

[andy pugh]

On 3 February 2017 at 07:59, Valerio Bellizzomi  wrote:
> http://www.infodelta.it/foto/film/filettatura%20interpolata.mp4

It isn't easy to tell what they are showing.
Initially it looks like thread-milling with a conventional tap.

If you attempt thread-milling with a conventional tap and ignore the
lead then you will just mill a cylindrical face due to the lead.

I can imagine that you could move the X-axis down synchronised with
the tap lead, but I imagine that if you were thread-milling you would
very soon run out of tap length.

Later sections show cutters which are definitely thread-mills.


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[Emc-users] Does anybody know about this interpolated tapping ?

[Valerio Bellizzomi]

http://www.infodelta.it/foto/film/filettatura%20interpolata.mp4






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