Re: [Emc-developers] I wish I had a super size 8i20

[Gene Heskett]

On Saturday 27 February 2021 08:08:49 Curtis Dutton wrote:

> I've recently purchased a Fadal VMC 15 and I'll be retrofitting it and
> replacing servos and electronics. The last machine I retrofitted was
> an old miyano gang lathe and I'm driving the spindle and servos with
> 8i20's. I just love them they are great.
>
> Is there any plan for a larger capacity 8i20? I wish I didnt have to
> buy vfd's for large spindles and could use a super size 8i20. say up
> to 10hp or so.
>
> Has this ever been discussed before?
>
I expect it has, but you get a lot more control bang per buck in the 
average VFD. I am continually impressed with what you can make a vfd do.

I have a 1.5 horse model running an elderly 1 hp 3 phase on my 11x56 
Sheldon, and with an 8" 4 jaw chuck mounted, nearly 40 lbs, I can tap an 
m4 on the keyboard and the overtravel shown by some hal & pyvcp code, at 
100 spindle revs is nominally .25 turns. That $130 clone vfd simply does 
what I tell it to do. And once I learned its limits, it hasn't 
complained in 3+ years.

Or I can type s600m3, and less than a second later the pyvcp tach dial, 
driven by an encoder watching the bull gear, says 600 rpms. CSS works 
like magic. Type an m5 and its stopped dead in about 3 turns.  Upping 
that to a 10hp would probably dim the neighborhood lights for that 
fraction of a second, but it would be done. No PID's in that config, the 
encoder is only used for threading and some timing on a spindle 
direction change sequence, and for some G33 stuffs. And its only an 
rpi3b, now a 2 meg rpi4b, doing all that.

Whats not to like? You can't of course do that OOTB, but they are 
programmable, so teach it the Russian step dance. :)

> -Curt
>
> ___
> Emc-developers mailing list
> Emc-developers@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-developers


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 


___
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers

Re: [Emc-developers] I wish I had a super size 8i20

[Feral Engineer]

Thank you, sir.

I'm in process of doing an Emco pc turn 55 for myself and first order at
the school is a prolight conversion... along with freshening up some old
microkinetics hunks of junk that I'd rather not talk about .

I was thinking of keeping it fairly simple with the one at the school. DMM
servos, 7i76e, see if I could reuse the old spindle drive somehow.
Considering the shape the old girl is in now, anything would be an upgrade.
Mechanically, it's still very sound but the operator panel looks like she
came out of a back alley on an episode of Cops. The school board ordered a
new Haas for the machining class (*cries in DMG Mori*), but I want the
engineering students to get a taste of real world instead of just poking at
a plc pegboard with a traffic light attached to it. The educational power
of Linuxcnc alone is worth its weight.

Admittedly, I'm just a lurker on the dev email as the only "programming"
experience I have, besides 25 years of G code, is with Fanuc, Mitsubishi
and Siemens macro logic (I'm still a proponent of goto statements in macro,
btw ) , but LinuxCNC has inspired me to do so many new things, like learn
plc circuitry and just the other day, crack open my old book on C
programming. I'm an AE for DMG Mori, but never got into the electrical side
of things until just recent, all because of the power of Linuxcnc. I can't
thank all of you guys enough for your contribution to this. I hope my
YouTube tutorials and contributions at my school help bring in a lot of
eager new users and developers to the project.

Thanks again 


On Sat, Feb 27, 2021, 12:48 PM Curtis Dutton  wrote:

> I'd be happy to show how the conversion goes.
>
> I need to do a writeup on the lathe I just finished too. I have yaskawa
> encoder modules written for mesa and hostmot2 drivers for those in
> linuxcnc. I'm getting ready to publish them soon.
>
> The machine is being delivered next weekend so I haven't gotten to tear
> into it yet. From what I can tell it may have the same bolt pattern as the
> 900W yaskawa servos that I used on the lathe. If so I'll be using them.
> Those yaskawas perform so very well with the 8i20 and 2097152 count
> encoders.
>
> On Sat, Feb 27, 2021 at 12:27 PM Feral Engineer <
> theferalengin...@gmail.com>
> wrote:
>
> > Curt,
> >
> > Can you please document your progress with the Fadal? There's one at my
> old
> > school I want to dig into eventually with some of the students. It's
> also a
> > VMC 15.
> >
> > Thanks!
> >
> > Phil
> >
> >
> > On Sat, Feb 27, 2021, 8:09 AM Curtis Dutton  wrote:
> >
> > > I've recently purchased a Fadal VMC 15 and I'll be retrofitting it and
> > > replacing servos and electronics. The last machine I retrofitted was an
> > old
> > > miyano gang lathe and I'm driving the spindle and servos with 8i20's. I
> > > just love them they are great.
> > >
> > > Is there any plan for a larger capacity 8i20? I wish I didnt have to
> buy
> > > vfd's for large spindles and could use a super size 8i20. say up to
> 10hp
> > or
> > > so.
> > >
> > > Has this ever been discussed before?
> > >
> > > -Curt
> > >
> > > ___
> > > Emc-developers mailing list
> > > Emc-developers@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/emc-developers
> > >
> >
> > ___
> > Emc-developers mailing list
> > Emc-developers@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-developers
> >
>
> ___
> Emc-developers mailing list
> Emc-developers@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-developers
>

___
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers

Re: [Emc-developers] I wish I had a super size 8i20

[Curtis Dutton]

I'd be happy to show how the conversion goes.

I need to do a writeup on the lathe I just finished too. I have yaskawa
encoder modules written for mesa and hostmot2 drivers for those in
linuxcnc. I'm getting ready to publish them soon.

The machine is being delivered next weekend so I haven't gotten to tear
into it yet. From what I can tell it may have the same bolt pattern as the
900W yaskawa servos that I used on the lathe. If so I'll be using them.
Those yaskawas perform so very well with the 8i20 and 2097152 count
encoders.

On Sat, Feb 27, 2021 at 12:27 PM Feral Engineer 
wrote:

> Curt,
>
> Can you please document your progress with the Fadal? There's one at my old
> school I want to dig into eventually with some of the students. It's also a
> VMC 15.
>
> Thanks!
>
> Phil
>
>
> On Sat, Feb 27, 2021, 8:09 AM Curtis Dutton  wrote:
>
> > I've recently purchased a Fadal VMC 15 and I'll be retrofitting it and
> > replacing servos and electronics. The last machine I retrofitted was an
> old
> > miyano gang lathe and I'm driving the spindle and servos with 8i20's. I
> > just love them they are great.
> >
> > Is there any plan for a larger capacity 8i20? I wish I didnt have to buy
> > vfd's for large spindles and could use a super size 8i20. say up to 10hp
> or
> > so.
> >
> > Has this ever been discussed before?
> >
> > -Curt
> >
> > ___
> > Emc-developers mailing list
> > Emc-developers@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-developers
> >
>
> ___
> Emc-developers mailing list
> Emc-developers@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-developers
>

___
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers

Re: [Emc-developers] I wish I had a super size 8i20

[Feral Engineer]

Curt,

Can you please document your progress with the Fadal? There's one at my old
school I want to dig into eventually with some of the students. It's also a
VMC 15.

Thanks!

Phil


On Sat, Feb 27, 2021, 8:09 AM Curtis Dutton  wrote:

> I've recently purchased a Fadal VMC 15 and I'll be retrofitting it and
> replacing servos and electronics. The last machine I retrofitted was an old
> miyano gang lathe and I'm driving the spindle and servos with 8i20's. I
> just love them they are great.
>
> Is there any plan for a larger capacity 8i20? I wish I didnt have to buy
> vfd's for large spindles and could use a super size 8i20. say up to 10hp or
> so.
>
> Has this ever been discussed before?
>
> -Curt
>
> ___
> Emc-developers mailing list
> Emc-developers@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-developers
>

___
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers

Re: [Emc-developers] I wish I had a super size 8i20

[Peter C. Wallace]

On Sat, 27 Feb 2021, Curtis Dutton wrote:


Date: Sat, 27 Feb 2021 08:08:49 -0500
From: Curtis Dutton 
Reply-To: EMC developers 
To: EMC developers 
Subject: [Emc-developers] I wish I had a super size 8i20

I've recently purchased a Fadal VMC 15 and I'll be retrofitting it and
replacing servos and electronics. The last machine I retrofitted was an old
miyano gang lathe and I'm driving the spindle and servos with 8i20's. I
just love them they are great.

Is there any plan for a larger capacity 8i20? I wish I didnt have to buy
vfd's for large spindles and could use a super size 8i20. say up to 10hp or
so.

Has this ever been discussed before?

-Curt



BTW I was looking at finally writing some driver code for the
DataPainter firmware module  using hal_port. The hal_port
manual page references example code but I cant seem to find it...





___
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers



Peter Wallace
Mesa Electronics


___
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers

Re: [Emc-developers] I wish I had a super size 8i20

[Peter C. Wallace]

On Sat, 27 Feb 2021, andy pugh wrote:


Date: Sat, 27 Feb 2021 13:26:39 +
From: andy pugh 
Reply-To: EMC developers 
To: EMC developers 
Subject: Re: [Emc-developers] I wish I had a super size 8i20

On Sat, 27 Feb 2021 at 13:09, Curtis Dutton  wrote:

I'm driving the spindle and servos with 8i20's. I
just love them they are great.

I like the 8i20 (I have 5 in use) but I think I like the STMBL more.

And it might be an easier proposition to put a much bigger power stage
on an STMBL than it is to make a new 8i20.


I would think a STMBL like device with a standard connector
to an separate power stage would be a good idea.

Peter Wallace
Mesa Electronics




___
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers

Re: [Emc-developers] I wish I had a super size 8i20

[andy pugh]

On Sat, 27 Feb 2021 at 13:09, Curtis Dutton  wrote:
>
> I'm driving the spindle and servos with 8i20's. I
> just love them they are great.

I like the 8i20 (I have 5 in use) but I think I like the STMBL more.

And it might be an easier proposition to put a much bigger power stage
on an STMBL than it is to make a new 8i20.

-- 
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


___
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers

[Emc-developers] I wish I had a super size 8i20

[Curtis Dutton]

I've recently purchased a Fadal VMC 15 and I'll be retrofitting it and
replacing servos and electronics. The last machine I retrofitted was an old
miyano gang lathe and I'm driving the spindle and servos with 8i20's. I
just love them they are great.

Is there any plan for a larger capacity 8i20? I wish I didnt have to buy
vfd's for large spindles and could use a super size 8i20. say up to 10hp or
so.

Has this ever been discussed before?

-Curt

___
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers