Re: [Emc-users] stmbl servo drives - want to buy...

[John Dammeyer]

Sometimes a change of parts is easy.  Sometimes not.  In this case the only 
issue is a 24V max relay voltage limit as the new drivers are rated max 28V.  
The old ones were significantly higher voltage but discontinued.  All fit.  
Software doesn't know the difference.

John


> -Original Message-
> From: John Dammeyer [mailto:jo...@autoartisans.com]
> Sent: October-16-22 1:54 PM
> To: 'Enhanced Machine Controller (EMC)'
> Subject: Re: [Emc-users] stmbl servo drives - want to buy...
> 
> Which is why I ordered 500 of the BTS70102EP dual relay drivers and only 
> started on the board upgrades
> when the parts were in _my_ inventory.
> 
> So anyone who wants to design a new version of the STMBL, or anything that 
> uses hi-tech parts, should
> decide to make say 100 and order the parts.  When they have arrived, then 
> design the PC boards and get
> them made.
> 
> It means sitting on a lot of dollars of inventory for as long as a year.  
> Just the way it is now.
> 
> John
> 
> 
> 
> > -Original Message-
> > From: Markus Bechtold [mailto:mar...@r-bechtold.de]
> > Sent: October-16-22 1:27 PM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] stmbl servo drives - want to buy...
> >
> > There are newer versions of the stmbl and multiple add ons but the 
> > development is on hold at the moment
> > because there is a problem: selecting parts, design the board  and just 
> > before ordering boards most of the
> > parts will become unoptanium rinse and repeat. I hope it will change in the 
> > next month.
> >
> > > On 16. Oct 2022, at 14:03, Markus Bechtold  wrote:
> > >
> > > This problem with the power stage is solved there is a solution with a 
> > > new High power powerstage
> > >
> > > The main problem at the moment is that some critical components like the 
> > > 2 stm32 are not available (as
> of
> > today there is a delivery date 10.03.2023) The stmbl uses some features of 
> > this stm controllers like the
> > internet HIghspeed comperators and Shunt opamps.
> > > Hopefully there will be new stmbl as short as possible if the craziness 
> > > of the chip market will normalise and
> > you have not to pay something like 45? for a stm32
> > >
> > >
> > >
> > >> On 16. Oct 2022, at 08:41, Roland Jollivet  
> > >> wrote:
> > >>
> > >>> Now.  Why is it not available?  Two reasons.  The key thing about the
> > >>> STMBL for 3 phase AC servos was that it used single driver for all three
> > >>> windings.  Probably originally designed for washing machines.  It was
> > >>> discontinued.  A different one with slightly lower power was available.
> > >>> There are others but different pinout so board change.
> > >>>
> > >>
> > >> Yes, the same style driver chip found in all the chinese drives too. A
> > >> 27pin PDIP
> > >> I opened a Chinese drive up and it looked to be a text-book 
> > >> implementation
> > >> of one of these drivers. With very little noise suppression though.
> > >>
> > >> ___
> > >> Emc-users mailing list
> > >> Emc-users@lists.sourceforge.net
> > >> https://lists.sourceforge.net/lists/listinfo/emc-users
> > >
> > >
> > >
> > > ___
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> > > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> >
> >
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> 
> 
> 
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Re: [Emc-users] stmbl servo drives - want to buy...

[John Dammeyer]

Which is why I ordered 500 of the BTS70102EP dual relay drivers and only 
started on the board upgrades when the parts were in _my_ inventory.  

So anyone who wants to design a new version of the STMBL, or anything that uses 
hi-tech parts, should decide to make say 100 and order the parts.  When they 
have arrived, then design the PC boards and get them made.

It means sitting on a lot of dollars of inventory for as long as a year.  Just 
the way it is now.

John



> -Original Message-
> From: Markus Bechtold [mailto:mar...@r-bechtold.de]
> Sent: October-16-22 1:27 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] stmbl servo drives - want to buy...
> 
> There are newer versions of the stmbl and multiple add ons but the 
> development is on hold at the moment
> because there is a problem: selecting parts, design the board  and just 
> before ordering boards most of the
> parts will become unoptanium rinse and repeat. I hope it will change in the 
> next month.
> 
> > On 16. Oct 2022, at 14:03, Markus Bechtold  wrote:
> >
> > This problem with the power stage is solved there is a solution with a new 
> > High power powerstage
> >
> > The main problem at the moment is that some critical components like the 2 
> > stm32 are not available (as of
> today there is a delivery date 10.03.2023) The stmbl uses some features of 
> this stm controllers like the
> internet HIghspeed comperators and Shunt opamps.
> > Hopefully there will be new stmbl as short as possible if the craziness of 
> > the chip market will normalise and
> you have not to pay something like 45� for a stm32
> >
> >
> >
> >> On 16. Oct 2022, at 08:41, Roland Jollivet  
> >> wrote:
> >>
> >>> Now.  Why is it not available?  Two reasons.  The key thing about the
> >>> STMBL for 3 phase AC servos was that it used single driver for all three
> >>> windings.  Probably originally designed for washing machines.  It was
> >>> discontinued.  A different one with slightly lower power was available.
> >>> There are others but different pinout so board change.
> >>>
> >>
> >> Yes, the same style driver chip found in all the chinese drives too. A
> >> 27pin PDIP
> >> I opened a Chinese drive up and it looked to be a text-book implementation
> >> of one of these drivers. With very little noise suppression though.
> >>
> >> ___
> >> Emc-users mailing list
> >> Emc-users@lists.sourceforge.net
> >> https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> 
> 
> 
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Re: [Emc-users] stmbl servo drives - want to buy...

[Markus Bechtold]

There are newer versions of the stmbl and multiple add ons but the development 
is on hold at the moment because there is a problem: selecting parts, design 
the board  and just before ordering boards most of the parts will become 
unoptanium rinse and repeat. I hope it will change in the next month. 

> On 16. Oct 2022, at 14:03, Markus Bechtold  wrote:
> 
> This problem with the power stage is solved there is a solution with a new 
> High power powerstage 
> 
> The main problem at the moment is that some critical components like the 2 
> stm32 are not available (as of today there is a delivery date 10.03.2023) The 
> stmbl uses some features of this stm controllers like the internet HIghspeed 
> comperators and Shunt opamps.
> Hopefully there will be new stmbl as short as possible if the craziness of 
> the chip market will normalise and you have not to pay something like 45€ for 
> a stm32 
> 
> 
> 
>> On 16. Oct 2022, at 08:41, Roland Jollivet  wrote:
>> 
>>> Now.  Why is it not available?  Two reasons.  The key thing about the
>>> STMBL for 3 phase AC servos was that it used single driver for all three
>>> windings.  Probably originally designed for washing machines.  It was
>>> discontinued.  A different one with slightly lower power was available.
>>> There are others but different pinout so board change.
>>> 
>> 
>> Yes, the same style driver chip found in all the chinese drives too. A
>> 27pin PDIP
>> I opened a Chinese drive up and it looked to be a text-book implementation
>> of one of these drivers. With very little noise suppression though.
>> 
>> ___
>> Emc-users mailing list
>> Emc-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/emc-users
> 
> 
> 
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Re: [Emc-users] stmbl servo drives - want to buy...

[John Dammeyer]

> From: Markus Bechtold [mailto:mar...@r-bechtold.de]
> 
> This problem with the power stage is solved there is a solution with a new 
> High power powerstage
> 
Yes.  There's a on-going need for that type of driver all in one package.  I'm 
still surprised that the original was discontinued.  But then the IPS6041 high 
side relay driver with short/open circuit detect was also discontinued and I 
ended up doing a change on 4 different PC boards to handle a different dual 
channel device.  And I didn't make those changes until I had 500 of the items 
in stock.


> The main problem at the moment is that some critical components like the 2 
> stm32 are not available (as of
> today there is a delivery date 10.03.2023) The stmbl uses some features of 
> this stm controllers like the
> internet HIghspeed comperators and Shunt opamps.
> Hopefully there will be new stmbl as short as possible if the craziness of 
> the chip market will normalise and
> you have not to pay something like 45� for a stm32
> 
And it might be possible to replace it with a totally different processor that 
is available but then there are software changes and the repository has to fork 
but now if there are changes then two different paths have to be supported.  
Expensive even if the time to do it is free.

And this chip shortage isn't only with processors.  I use 3 of the ones shown 
in the attached photo on each product.  The mouser delivery date keeps changing 
between where it is now and June 2023.  And they were ordered last year at this 
time (2021).
John

> 
> 
> > On 16. Oct 2022, at 08:41, Roland Jollivet  
> > wrote:
> >
> >> Now.  Why is it not available?  Two reasons.  The key thing about the
> >> STMBL for 3 phase AC servos was that it used single driver for all three
> >> windings.  Probably originally designed for washing machines.  It was
> >> discontinued.  A different one with slightly lower power was available.
> >> There are others but different pinout so board change.
> >>
> >
> > Yes, the same style driver chip found in all the chinese drives too. A
> > 27pin PDIP
> > I opened a Chinese drive up and it looked to be a text-book implementation
> > of one of these drivers. With very little noise suppression though.
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> 
> 
> 
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Re: [Emc-users] stmbl servo drives - want to buy...

[gene heskett]

On 10/16/22 08:46, Markus Bechtold wrote:

This problem with the power stage is solved there is a solution with a new High 
power powerstage

URL? Or JEDEC #.


The main problem at the moment is that some critical components like the 2 
stm32 are not available (as of today there is a delivery date 10.03.2023) The 
stmbl uses some features of this stm controllers like the internet HIghspeed 
comperators and Shunt opamps.
Hopefully there will be new stmbl as short as possible if the craziness of the 
chip market will normalise and you have not to pay something like 45€ for a 
stm32

  


On 16. Oct 2022, at 08:41, Roland Jollivet  wrote:


Now.  Why is it not available?  Two reasons.  The key thing about the
STMBL for 3 phase AC servos was that it used single driver for all three
windings.  Probably originally designed for washing machines.  It was
discontinued.  A different one with slightly lower power was available.
There are others but different pinout so board change.


Yes, the same style driver chip found in all the chinese drives too. A
27pin PDIP
I opened a Chinese drive up and it looked to be a text-book implementation
of one of these drivers. With very little noise suppression though.

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Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
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Re: [Emc-users] stmbl servo drives - want to buy...

[Markus Bechtold]

This problem with the power stage is solved there is a solution with a new High 
power powerstage 

The main problem at the moment is that some critical components like the 2 
stm32 are not available (as of today there is a delivery date 10.03.2023) The 
stmbl uses some features of this stm controllers like the internet HIghspeed 
comperators and Shunt opamps.
Hopefully there will be new stmbl as short as possible if the craziness of the 
chip market will normalise and you have not to pay something like 45€ for a 
stm32 

 

> On 16. Oct 2022, at 08:41, Roland Jollivet  wrote:
> 
>> Now.  Why is it not available?  Two reasons.  The key thing about the
>> STMBL for 3 phase AC servos was that it used single driver for all three
>> windings.  Probably originally designed for washing machines.  It was
>> discontinued.  A different one with slightly lower power was available.
>> There are others but different pinout so board change.
>> 
> 
> Yes, the same style driver chip found in all the chinese drives too. A
> 27pin PDIP
> I opened a Chinese drive up and it looked to be a text-book implementation
> of one of these drivers. With very little noise suppression though.
> 
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Re: [Emc-users] stmbl servo drives - want to buy...

[John Dammeyer]

> -Original Message-
> From: Roland Jollivet [mailto:roland.jolli...@gmail.com]
> > Now.  Why is it not available?  Two reasons.  The key thing about the
> > STMBL for 3 phase AC servos was that it used single driver for all three
> > windings.  Probably originally designed for washing machines.  It was
> > discontinued.  A different one with slightly lower power was available.
> > There are others but different pinout so board change.
> >
> 
> Yes, the same style driver chip found in all the chinese drives too. A
> 27pin PDIP
> I opened a Chinese drive up and it looked to be a text-book implementation
> of one of these drivers. With very little noise suppression though.
> 
There are a number of different devices out there like that.  What makes them 
nice to use is the current sensing for each winding is also built in so it's 
easy to do all the control stuff.

But when a supplier discontinues a device it requires a change to the PC board 
and possibly the software.The STMBL was created to have drivers for the 
designers' machines.  Add to that, as Andy mentioned, the smart-serial control 
which most AC servo drives to not have, makes the STMBL a pretty special piece 
of hardware.

But the designers were not in the business of creating motor drives.   I got my 
STMBL boards from Andy when the transitor drivers were still available.  Now 
the processors are back ordered. Of course a different processor, if available, 
could be used.  But then again someone has to modify the software and the PC 
board.  And be able to do all the testing to make sure it works.

This is the fundamental issue with Open Source Projects.   Once the designers 
are done and have their systems functional, (along with a half a dozen spares 
perhaps), there's no incentive to make more or redesign.  That they still 
provide support is amazing and fantastic.

Look around now and it's not just MACH2 and EMC (now LinuxCNC) but there are 4 
or 5 different CNC software systems out there, if not more.  So the 
smart-serial for a CNC system that is 20% or less of the CNC market place is a 
lot of work.  Probably why you don't see it on any of the Chinese drives.   

And now we have closed loop stepper drivers and motors.  Easy to mount on small 
mills and lathes with more reliability and other than retro-fit what is the 
real market for the STMBL?  Especially for small milling machines and lathe 
with 3 or maybe 4 axis.

So when the processor is a year or more before delivery, the driver module has 
been discontinued, there is no single manufacturer making them because it's 
open source, the STMBL is a great idea but not available.

In the same manner the HP_UHU DC servo, even with Henrik Olsson's microchip 
processor upgrade is dead in the water unless someone does a new board run with 
the latest revisions.  I have the Altium CAD files and even DC motors but 
nothing to mount them on that isn't already controlled with an AC servo.  So 
very little incentive other than just for fun to create a new HP_UHU with parts 
that are available.  Some of the DIP parts have been discontinued on it too so 
the board layout 'tweak' isn't trivial.

John Dammeyer






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[Emc-users] stmbl servo drives - want to buy...

[Roland Jollivet]

> Now.  Why is it not available?  Two reasons.  The key thing about the
> STMBL for 3 phase AC servos was that it used single driver for all three
> windings.  Probably originally designed for washing machines.  It was
> discontinued.  A different one with slightly lower power was available.
> There are others but different pinout so board change.
>

Yes, the same style driver chip found in all the chinese drives too. A
27pin PDIP
I opened a Chinese drive up and it looked to be a text-book implementation
of one of these drivers. With very little noise suppression though.

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Re: [Emc-users] stmbl servo drives - want to buy...

[gene heskett]

On 10/15/22 16:15, John Dammeyer wrote:

On 10/15/22 14:17, andy pugh wrote:

On Sat, 15 Oct 2022 at 18:02, John Dammeyer  wrote:

What would a working STMBL go for nowadays? One can buy servo motor/drive 
combinations as cheap as

$200 from China although shipping is a bear.

The STMBL really shines as a retrofit drive, as it can be persuaded to
work with almost anything. It's also rather nice having digital
position control via smart-serial.

But given that they don't really exist at the moment, it's difficult
to recommend them.


If you've the time Andy,, some of us would like a history of STMBL, and
why they don't exist today?

Cheers, Gene Heskett.

Might be past Andy's bedtime now so I'll add my two cents.  First check out 
this web link.
https://github.com/rene-dev/stmbl
Then read the getting started guide which fills in a lot of the blanks.

Now.  Why is it not available?  Two reasons.  The key thing about the STMBL for 
3 phase AC servos was that it used single driver for all three windings.  
Probably originally designed for washing machines.  It was discontinued.  A 
different one with slightly lower power was available.  There are others but 
different pinout so board change.

It uses two processors.   One for the high voltage side and communication with 
the other one is done optically for full isolation.  The main processor does 
all the interaction with the outside world.  The smaller driver processor 
apparently is currently sitting with a more than 1 year delivery date.  That 
may have changed.

Not only is the schematic open source but so is the software.  Truly one of the 
great projects released over the last few years.  I have it connected to my 
harmonic drive which is AC servo based.

I never did get it working with the brushed DC motors.  Only the STMBL designer 
appears to have used it with a DC motor and otherwise seems no one else has so 
support was essentially non-existent.  I went back to using the HP_UHU drives 
until I swapped them out for Bergerda AC Servos.

John
Brushed PMDC motors are Pico Systems PWM-Servo driver territory, up to 2 
or 3 horse. I'm running two of them, good control,
and bullet-proof. With 1hp motors, rated 90 volts, 9.7 amps FLA, I'm 
banging two of them at 125+ volts and  have the current
limiters set for around 18 amps. If I hang the cut, stopping the motors, 
I can hear the iron chirp as the current limits kick in,
and at least once I was out refilling my coffee cup, to come back and 
find it sitting there complaining.  I twisted the shaft off
an identical rated treadmill motor once, but that driver has survived 
everything I've thrown it at, one of them for 7 or 8 years now.


That servo amp is a full 4 quad amp, and a quick reversal will push the 
psu to around 175 volts, which it then uses to accel
in the other direction. No shop light  blink from a 400 millisecond 
reverse from wide open to wide open in the other direction.


However, I had to get creative in hal, intercepting the reverse, 
generating a stop instead, wait for it to stop by watching the
encoder, then let the reverse thru to the controller and bring it back 
up to speed.


Jon Elson makes good stuff.

Take care and stay well John D.

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, 1940)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
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Re: [Emc-users] stmbl servo drives - want to buy...

[gene heskett]

On 10/15/22 16:13, andy pugh wrote:

On Sat, 15 Oct 2022 at 20:37, gene heskett  wrote:


If you've the time Andy,, some of us would like a history of STMBL, and
why they don't exist today?

It's not my project, so I don't know the full history.

But it uses a power IC that went out of production a few years ago
https://octopart.com/search?q=IRAM256-2067A2 (has to be A2)
and STM32 microcontrollers that are basically unobtainable at the moment.
https://octopart.com/search?q=STM32F405VGT
That is an impressive chip. To see it disco'd already probably means its 
been replaced

with an even better part,  The question then is what replaced it?

The microcontroller should not be a problem, lots of arm variations 
exist that may be

able to do that part.  Provided patents and copyrights can be negotiated.

Thanks Andy.  Take care and stay well.

Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
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Re: [Emc-users] stmbl servo drives - want to buy...

[John Dammeyer]

> On 10/15/22 14:17, andy pugh wrote:
> > On Sat, 15 Oct 2022 at 18:02, John Dammeyer  wrote:
> >> What would a working STMBL go for nowadays? One can buy servo motor/drive 
> >> combinations as cheap as
> $200 from China although shipping is a bear.
> > The STMBL really shines as a retrofit drive, as it can be persuaded to
> > work with almost anything. It's also rather nice having digital
> > position control via smart-serial.
> >
> > But given that they don't really exist at the moment, it's difficult
> > to recommend them.
> >
> If you've the time Andy,, some of us would like a history of STMBL, and
> why they don't exist today?
> 
> Cheers, Gene Heskett.

Might be past Andy's bedtime now so I'll add my two cents.  First check out 
this web link.
https://github.com/rene-dev/stmbl
Then read the getting started guide which fills in a lot of the blanks.

Now.  Why is it not available?  Two reasons.  The key thing about the STMBL for 
3 phase AC servos was that it used single driver for all three windings.  
Probably originally designed for washing machines.  It was discontinued.  A 
different one with slightly lower power was available.  There are others but 
different pinout so board change.

It uses two processors.   One for the high voltage side and communication with 
the other one is done optically for full isolation.  The main processor does 
all the interaction with the outside world.  The smaller driver processor 
apparently is currently sitting with a more than 1 year delivery date.  That 
may have changed.

Not only is the schematic open source but so is the software.  Truly one of the 
great projects released over the last few years.  I have it connected to my 
harmonic drive which is AC servo based.

I never did get it working with the brushed DC motors.  Only the STMBL designer 
appears to have used it with a DC motor and otherwise seems no one else has so 
support was essentially non-existent.  I went back to using the HP_UHU drives 
until I swapped them out for Bergerda AC Servos.

John






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Re: [Emc-users] stmbl servo drives - want to buy...

[andy pugh]

On Sat, 15 Oct 2022 at 20:37, gene heskett  wrote:

> If you've the time Andy,, some of us would like a history of STMBL, and
> why they don't exist today?

It's not my project, so I don't know the full history.

But it uses a power IC that went out of production a few years ago
https://octopart.com/search?q=IRAM256-2067A2 (has to be A2)
and STM32 microcontrollers that are basically unobtainable at the moment.
https://octopart.com/search?q=STM32F405VGT

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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Re: [Emc-users] stmbl servo drives - want to buy...

[gene heskett]

On 10/15/22 14:17, andy pugh wrote:

On Sat, 15 Oct 2022 at 18:02, John Dammeyer  wrote:

What would a working STMBL go for nowadays? One can buy servo motor/drive 
combinations as cheap as $200 from China although shipping is a bear.

The STMBL really shines as a retrofit drive, as it can be persuaded to
work with almost anything. It's also rather nice having digital
position control via smart-serial.

But given that they don't really exist at the moment, it's difficult
to recommend them.

If you've the time Andy,, some of us would like a history of STMBL, and 
why they don't exist today?


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, 1940)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 



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Re: [Emc-users] stmbl servo drives - want to buy...

[andy pugh]

On Sat, 15 Oct 2022 at 18:02, John Dammeyer  wrote:
>
> What would a working STMBL go for nowadays? One can buy servo motor/drive 
> combinations as cheap as $200 from China although shipping is a bear.

The STMBL really shines as a retrofit drive, as it can be persuaded to
work with almost anything. It's also rather nice having digital
position control via smart-serial.

But given that they don't really exist at the moment, it's difficult
to recommend them.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1912


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Re: [Emc-users] stmbl servo drives - want to buy...

[John Dammeyer]

What would a working STMBL go for nowadays? One can buy servo motor/drive 
combinations as cheap as $200 from China although shipping is a bear.

John


> -Original Message-
> From: Jérémie Tarot [mailto:silopo...@gmail.com]
> Sent: October-15-22 3:28 AM
> To: j...@pibf.de; Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] stmbl servo drives - want to buy...
> 
> I'd love to get at least one someday for learning, testing, and
> documentation putpose...
> 
> ___
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Re: [Emc-users] stmbl servo drives - want to buy...

[Jérémie Tarot]

I'd love to get at least one someday for learning, testing, and
documentation putpose...

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Re: [Emc-users] stmbl servo drives - want to buy...

[lcnc]

I also.
Joachim

Am 12.10.22 um 13:35 schrieb Marius Alksnys:

2022-10-07 14:06, stjohn gold rašė:

Hi,
I need 2 stmbl drives. Does anyone have some they are not using or wish to
sell? Just tell me how much you want and I can arrange to get them picked
up and shipped to me. Send me mail and I will answer!

many thanks,
St.john


I would also be interested in 2..12 stmbl's.





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Re: [Emc-users] stmbl servo drives - want to buy...

[Marius Alksnys]

2022-10-07 14:06, stjohn gold rašė:

Hi,
I need 2 stmbl drives. Does anyone have some they are not using or wish to
sell? Just tell me how much you want and I can arrange to get them picked
up and shipped to me. Send me mail and I will answer!

many thanks,
St.john


I would also be interested in 2..12 stmbl's.





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[Emc-users] stmbl servo drives - want to buy...

[stjohn gold]

Hi,
I need 2 stmbl drives. Does anyone have some they are not using or wish to
sell? Just tell me how much you want and I can arrange to get them picked
up and shipped to me. Send me mail and I will answer!

many thanks,
St.john

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