Re: [Emc-users] connecting up mpg

[andy pugh]

On Mon, 23 Mar 2020 at 04:37, andrew beck  wrote:

> I have a 12 volt mpg

Do you have the list of what each wire is? It may be set up for 12v
supply to LEDs but with access to both ends of phototransistors, for
example.

But as per the first reply, try it on 5V first.


-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
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[Emc-users] linuxcnc openlung ventilators

[TJoseph Powderly]

How can Linuxcnc people help with OpenLung?
https://gitlab.com/open-source-ventilator/OpenLung

tomp


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[Emc-users] Supplier for low-voltage (48V) servo motors?

[Philipp Burch]

Hi everyone,

could anyone of you suggest where to look for reasonably-priced
low-voltage servo motors? It should have a standard 40mm or 58/60mm
flange, 0.3Nm (40mm) or 0.6Nm (60mm), something in the range of 3000rpm
nominal speed at 48V and an integrated feedback system. Preferably a
multiturn absolute encoder with Hiperface, EnDat or SSI.

Any suggestions?

Thanks! Best regards,
Philipp


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Re: [Emc-users] Supplier for low-voltage (48V) servo motors?

[andy pugh]

On Mon, 23 Mar 2020 at 13:14, Philipp Burch  wrote:

> Any suggestions?

If you are in .ch, have you tried Maxon?

-- 
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] connecting up mpg

[Peter C. Wallace]

On Mon, 23 Mar 2020, andrew beck wrote:


Date: Mon, 23 Mar 2020 17:32:56 +1300
From: andrew beck 
Reply-To: "Enhanced Machine Controller (EMC)"

To: "Enhanced Machine Controller (EMC)" 
Subject: [Emc-users] connecting up mpg

Hey guys.

I have a 12 volt mpg

I want to connect it to the 7i76 board.  do you know if I can connect it
straight up.  I think that the mesa boards only want 5 v and I am not sure
how to connect up my 12 volt mpg

https://drive.google.com/file/d/1uOF2y7KFSchXLhQ3s79GSB1x_WZieQ5l/view?usp=sharing

I did a bunch of searches on the forum but couldn't get a definite answer.

I tried to attach a photo but it bounced back.  so here is a link

regards



You can connect a 12V MPG to the 7I76 MPG inputs (field inputs 16..19), but not 
the high speed encoder input. Note that the input threshold for MPG inputs is 
2.5V so the MPG output needs to swing close to ground for reliable operation






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Re: [Emc-users] Supplier for low-voltage (48V) servo motors?

[Philipp Burch]

Hi Andy!

On 23.03.20 15:00, andy pugh wrote:
> On Mon, 23 Mar 2020 at 13:14, Philipp Burch  wrote:
> 
>> Any suggestions?
> 
> If you are in .ch, have you tried Maxon?
> 

Yes, they build cool motors, but nothing in some industry-standard form
factor with standard encoders. And most probably very expensive. Same
for Faulhaber.

Bye,
Philipp


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Re: [Emc-users] Supplier for low-voltage (48V) servo motors?

[Andrew]

Have you tried searching AliExpress for "48V bldc servo" etc?

пн, 23 бер. 2020, 15:14 користувач Philipp Burch  пише:

> Hi everyone,
>
> could anyone of you suggest where to look for reasonably-priced
> low-voltage servo motors? It should have a standard 40mm or 58/60mm
> flange, 0.3Nm (40mm) or 0.6Nm (60mm), something in the range of 3000rpm
> nominal speed at 48V and an integrated feedback system. Preferably a
> multiturn absolute encoder with Hiperface, EnDat or SSI.
>
> Any suggestions?
>
> Thanks! Best regards,
> Philipp
>
>
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Re: [Emc-users] Supplier for low-voltage (48V) servo motors?

[Philipp Burch]

Yup, tried that with no success.

Regards,
Philipp

On 23.03.20 16:45, Andrew wrote:
> Have you tried searching AliExpress for "48V bldc servo" etc?
> 
> пн, 23 бер. 2020, 15:14 користувач Philipp Burch  пише:
> 
>> Hi everyone,
>>
>> could anyone of you suggest where to look for reasonably-priced
>> low-voltage servo motors? It should have a standard 40mm or 58/60mm
>> flange, 0.3Nm (40mm) or 0.6Nm (60mm), something in the range of 3000rpm
>> nominal speed at 48V and an integrated feedback system. Preferably a
>> multiturn absolute encoder with Hiperface, EnDat or SSI.
>>
>> Any suggestions?
>>
>> Thanks! Best regards,
>> Philipp
>>
>>
>> ___
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Re: [Emc-users] Supplier for low-voltage (48V) servo motors?

[André Meier]

Hey Philipp,
what about this Motors:
https://de.aliexpress.com/item/467490526.html?spm=a2g0x.search0306.3.13.64405afdrsoGOm&ws_ab_test=searchweb0_0,searchweb201602_0,searchweb201603_0,ppcSwitch_0&algo_pvid=5b8b48ea-ce1b-46e7-a440-6b64901de7b8&algo_expid=5b8b48ea-ce1b-46e7-a440-6b64901de7b8-2

Kind Regards
Andre


Am Mo., 23. März 2020 um 17:02 Uhr schrieb Philipp Burch :

> Yup, tried that with no success.
>
> Regards,
> Philipp
>
> On 23.03.20 16:45, Andrew wrote:
> > Have you tried searching AliExpress for "48V bldc servo" etc?
> >
> > пн, 23 бер. 2020, 15:14 користувач Philipp Burch  пише:
> >
> >> Hi everyone,
> >>
> >> could anyone of you suggest where to look for reasonably-priced
> >> low-voltage servo motors? It should have a standard 40mm or 58/60mm
> >> flange, 0.3Nm (40mm) or 0.6Nm (60mm), something in the range of 3000rpm
> >> nominal speed at 48V and an integrated feedback system. Preferably a
> >> multiturn absolute encoder with Hiperface, EnDat or SSI.
> >>
> >> Any suggestions?
> >>
> >> Thanks! Best regards,
> >> Philipp
> >>
> >>
> >> ___
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> >
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Re: [Emc-users] Supplier for low-voltage (48V) servo motors?

[andy pugh]

On Mon, 23 Mar 2020 at 15:25, Philipp Burch  wrote:

> Yes, they build cool motors, but nothing in some industry-standard form
> factor with standard encoders.

I just remembered Keling, who seem to have either merged or changed their name.
https://www.automationtechnologiesinc.com/products-page/nema-34-dc-servo-motor/

-- 
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] Supplier for low-voltage (48V) servo motors?

[John Dammeyer]

In, Vancouver there is 
http://www.dmm-tech.com

Any particular reason why you want 48V?  I use the Bergerda 220VAC units and 
although shipping is expensive the motor/drive components do end up costing 
less than the similar units from dmm-tech.

John Dammeyer



> -Original Message-
> From: Philipp Burch [mailto:p...@hb9etc.ch]
> Sent: March-23-20 8:59 AM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Supplier for low-voltage (48V) servo motors?
> 
> Yup, tried that with no success.
> 
> Regards,
> Philipp
> 
> On 23.03.20 16:45, Andrew wrote:
> > Have you tried searching AliExpress for "48V bldc servo" etc?
> >
> > ??, 23 ???. 2020, 15:14 ?? Philipp Burch  :
> >
> >> Hi everyone,
> >>
> >> could anyone of you suggest where to look for reasonably-priced
> >> low-voltage servo motors? It should have a standard 40mm or 58/60mm
> >> flange, 0.3Nm (40mm) or 0.6Nm (60mm), something in the range of 3000rpm
> >> nominal speed at 48V and an integrated feedback system. Preferably a
> >> multiturn absolute encoder with Hiperface, EnDat or SSI.
> >>
> >> Any suggestions?
> >>
> >> Thanks! Best regards,
> >> Philipp
> >>
> >>
> >> ___
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> >> https://lists.sourceforge.net/lists/listinfo/emc-users
> >>
> >
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> 
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Re: [Emc-users] Supplier for low-voltage (48V) servo motors?

[andy pugh]

On Mon, 23 Mar 2020 at 13:14, Philipp Burch  wrote:

> could anyone of you suggest where to look for reasonably-priced
> low-voltage servo motors?

I am not clear if the pictured motor matches the drive:

https://www.zappautomation.co.uk/cd120-aa-000.html


-- 
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] Supplier for low-voltage (48V) servo motors?

[John Dammeyer]

> -Original Message-
> From: andy pugh [mailto:bodge...@gmail.com]
> Sent: March-23-20 9:11 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Supplier for low-voltage (48V) servo motors?
> 
> On Mon, 23 Mar 2020 at 15:25, Philipp Burch  wrote:
> 
> > Yes, they build cool motors, but nothing in some industry-standard form
> > factor with standard encoders.
> 
> I just remembered Keling, who seem to have either merged or changed their 
> name.
> https://www.automationtechnologiesinc.com/products-page/nema-34-dc-servo-motor/

Yes.  They sell the Size 34 90VDC Brushed Motors I bought 10 years ago from 
Keling for my mill conversion.  Then when I finally mounted them last year, 
running with the HP_UHU drive kits (also 10 years old) that I found one motor 
was hotter than the other.  They might well have smaller 48V servos too.

Investigation with a meter produced the information that the motors were 
different, and the one that got hotter was like the ones they currently sell.  
I'm not sure what the torque characteristics are of the cooler motor but of 
course, being 10 years old Automation Technologies wasn't able to do anything 
since the manufacturer wouldn't be able to do anything either. 

So I looked at a new one along with shipping and encoder and it would still be 
a 90VDC brushed servo.  Having experienced the AC Servo with the STMBL drive, I 
started looking at AC Servos for both the axis drive and the spindle.  
Especially since a 2HP 3 phase motor along with higher end VFD would be quite 
expensive.

The end result was a Bergerda 1800W AC Servo and a 400W AC Servo with shipping 
that came in less than Automation Technologies replacement DC servo and a 3 
phase 2HP (1500W) for the spindle.

So you can tell I'm a fan of the Bergerda products and will be looking at 
getting a few more to replace the brushed motors and the 60V stepper on the 
knee.  That does away with both the 105VDC supply for the Brushed servo and the 
60V supply for the knee.  Especially since the mill already runs on 220 VAC 
anyway.

But until everything else has been completed (tool changer automatic draw bar, 
power cabinet side panels, spindle motor mount) etc. I've promised myself not 
to keep changing things.  Haven't even cast the mount for the harmonic drive 
yet...

John Dammeyer
> 
> --
> 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] Supplier for low-voltage (48V) servo motors?

[Philipp Burch]

Hi John, hi Andy!

On 23.03.20 17:13, John Dammeyer wrote:
> In, Vancouver there is 
> http://www.dmm-tech.com
> 
> Any particular reason why you want 48V?  I use the Bergerda 220VAC units and 
> although shipping is expensive the motor/drive components do end up costing 
> less than the similar units from dmm-tech.

Andy's link to AutomationTechnologies also brought me to DMM and their
portfolio would look very promising with extremely attractive prices.
But their encoders use a "proprietary serial protocol", which is only
supported by their own drives. So no option, either.

The reason for the 48V system is mainly safety, as it makes the design
so much simpler if you don't have to care about all the HV stuff inside
the machine. Everything else runs off 24V, there is no single wire
running through the machine carrying mains power.

The drive system supports several standard encoder interfaces, but
nothing proprietary. Using the motor manufacturer's drive is not an
option, as all motion components need to be connected to a high speed
serial bus (similar to EtherCAT).

Thanks and best regards,
Philipp


> 
> John Dammeyer
> 
> 
> 
>> -Original Message-
>> From: Philipp Burch [mailto:p...@hb9etc.ch]
>> Sent: March-23-20 8:59 AM
>> To: emc-users@lists.sourceforge.net
>> Subject: Re: [Emc-users] Supplier for low-voltage (48V) servo motors?
>>
>> Yup, tried that with no success.
>>
>> Regards,
>> Philipp
>>
>> On 23.03.20 16:45, Andrew wrote:
>>> Have you tried searching AliExpress for "48V bldc servo" etc?
>>>
>>> ??, 23 ???. 2020, 15:14 ?? Philipp Burch  :
>>>
 Hi everyone,

 could anyone of you suggest where to look for reasonably-priced
 low-voltage servo motors? It should have a standard 40mm or 58/60mm
 flange, 0.3Nm (40mm) or 0.6Nm (60mm), something in the range of 3000rpm
 nominal speed at 48V and an integrated feedback system. Preferably a
 multiturn absolute encoder with Hiperface, EnDat or SSI.

 Any suggestions?

 Thanks! Best regards,
 Philipp


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>>>
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>>
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Re: [Emc-users] linuxcnc openlung ventilators --> do not come close to other people

[Nicklas Karlsson]

Try to keep some distance to the people hanging in the meeting at my workplace. 
They sit in a relatively small room together for a long period of time so if 
one of them get sick he is likely to infect the others, they also tend to meet 
quite much other people.

Think to keep some distance is a rather good idea even if you know the other 
people well because disease does not know and make any difference.


> How can Linuxcnc people help with OpenLung?
> https://gitlab.com/open-source-ventilator/OpenLung
> 
> tomp
> 
> 
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Re: [Emc-users] linuxcnc openlung ventilators

[Ralph Stirling]

I think this is required reading before jumping on the diy medical device 
bandwagon.

https://docs.google.com/document/d/1-71FJTmI1Q1kjSDLP0EegMERjg_0kk_7UfaRE4r66Mg/edit?usp=drivesdk

-- Ralph

On Mar 23, 2020 6:08 AM, TJoseph Powderly  wrote:
CAUTION: This email originated from outside the Walla Walla University email 
system.


How can Linuxcnc people help with OpenLung?
https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgitlab.com%2Fopen-source-ventilator%2FOpenLung&data=02%7C01%7Cralph.stirling%40wallawalla.edu%7C664b8912e4524122347e08d7cf22d88b%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637205620886050273&sdata=EEcLtpgC9Gz1NFYuNqYDt%2Bu1lHcS1G5EAzzHeZXEPfQ%3D&reserved=0

tomp


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Re: [Emc-users] Supplier for low-voltage (48V) servo motors?

[John Dammeyer]

 
 
> Hi John, hi Andy!
> 
> > Any particular reason why you want 48V?  I use the Bergerda 220VAC units 
> > and although shipping is expensive the motor/drive
> components do end up costing less than the similar units from dmm-tech.
> 
> The reason for the 48V system is mainly safety, as it makes the design
> so much simpler if you don't have to care about all the HV stuff inside
> the machine. Everything else runs off 24V, there is no single wire
> running through the machine carrying mains power.
> 
 
Safety is a good reason.  I decided I didn't care when I realized I was already 
running 220VAC for the spindle and 110VAC for the power feed.  The Harmonic 
drive also needed at least 100VDC and could use 160VDC.  So the step up to a 
completely sealed system with really nice connectors for the Bergerda sealed 
the deal for me.
 

 
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Re: [Emc-users] Supplier for low-voltage (48V) servo motors?

[Nicklas Karlsson]

> Hi John, hi Andy!
> 
> On 23.03.20 17:13, John Dammeyer wrote:
> > In, Vancouver there is 
> > http://www.dmm-tech.com
> > 
> > Any particular reason why you want 48V?  I use the Bergerda 220VAC units 
> > and although shipping is expensive the motor/drive components do end up 
> > costing less than the similar units from dmm-tech.
> 
> ...
> The reason for the 48V system is mainly safety, as it makes the design
> so much simpler if you don't have to care about all the HV stuff inside
> the machine. Everything else runs off 24V, there is no single wire
> running through the machine carrying mains power.

Common mode voltage will also be lower, maybe inductance for electric time 
constant is lower and possibility to use MOFSET instead of IGBT might be a 
third reason. Lower inductance make possible faster dynamic response as torque 
change faster but also increase current ripple.

> The drive system supports several standard encoder interfaces, but
> nothing proprietary. Using the motor manufacturer's drive is not an
> option, as all motion components need to be connected to a high speed
> serial bus (similar to EtherCAT).

Similar to Ethercat, Sercos?

> Thanks and best regards,
> Philipp


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Re: [Emc-users] connecting up mpg

[andrew beck]

Hey Peter.

When I enable the mpg mode does that mean I will lose my whole config or do
I just need to change something in the Hal file.

I'm thinking It sounds like the best thing is to setup all my io in
pnfconfig leaving the mpg inputs spare and then after that start hard
coding in Hal.
Do you know how much I can do in pnfconfig?

New Zealand is going in to total isolation for a month from tomorrow
because of covid 19 so I have some time for this lol :)

Regards

Andrew

Regards

Andrew

On Mar 24, 2020 3:18 AM, "Peter C. Wallace"  wrote:

On Mon, 23 Mar 2020, andrew beck wrote:

> Date: Mon, 23 Mar 2020 17:32:56 +1300
> From: andrew beck 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: [Emc-users] connecting up mpg

>
> Hey guys.
>
> I have a 12 volt mpg
>
> I want to connect it to the 7i76 board.  do you know if I can connect it
> straight up.  I think that the mesa boards only want 5 v and I am not sure
> how to connect up my 12 volt mpg
>
>
https://drive.google.com/file/d/1uOF2y7KFSchXLhQ3s79GSB1x_WZieQ5l/view?usp=sharing
>
> I did a bunch of searches on the forum but couldn't get a definite answer.
>
> I tried to attach a photo but it bounced back.  so here is a link
>
> regards


You can connect a 12V MPG to the 7I76 MPG inputs (field inputs 16..19), but
not
the high speed encoder input. Note that the input threshold for MPG inputs
is
2.5V so the MPG output needs to swing close to ground for reliable operation



>
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Re: [Emc-users] connecting up mpg

[Peter C. Wallace]

On Tue, 24 Mar 2020, andrew beck wrote:


Date: Tue, 24 Mar 2020 07:34:01 +1300
From: andrew beck 
Reply-To: "Enhanced Machine Controller (EMC)"

To: "Enhanced Machine Controller (EMC)" 
Subject: Re: [Emc-users] connecting up mpg

Hey Peter.

When I enable the mpg mode does that mean I will lose my whole config or do
I just need to change something in the Hal file.


YOU just change some settings in the hal file


I'm thinking It sounds like the best thing is to setup all my io in
pnfconfig leaving the mpg inputs spare and then after that start hard
coding in Hal.


Yes leave the 2 or 4 pins (for 1 or 2 MPGs) free if you want to use a MPG
Note the enabling the MPG in the hal file will not cause you to lose the ability
to use inputs 16..19  for normal digital input use


Do you know how much I can do in pnfconfig?



I dont think pncconf supports MPG setup, so this needs to be done by editing the 
HAL file




New Zealand is going in to total isolation for a month from tomorrow
because of covid 19 so I have some time for this lol :)

Regards

Andrew

Regards

Andrew

On Mar 24, 2020 3:18 AM, "Peter C. Wallace"  wrote:

On Mon, 23 Mar 2020, andrew beck wrote:


Date: Mon, 23 Mar 2020 17:32:56 +1300
From: andrew beck 
Reply-To: "Enhanced Machine Controller (EMC)"

To: "Enhanced Machine Controller (EMC)" 
Subject: [Emc-users] connecting up mpg




Hey guys.

I have a 12 volt mpg

I want to connect it to the 7i76 board.  do you know if I can connect it
straight up.  I think that the mesa boards only want 5 v and I am not sure
how to connect up my 12 volt mpg



https://drive.google.com/file/d/1uOF2y7KFSchXLhQ3s79GSB1x_WZieQ5l/view?usp=sharing


I did a bunch of searches on the forum but couldn't get a definite answer.

I tried to attach a photo but it bounced back.  so here is a link

regards



You can connect a 12V MPG to the 7I76 MPG inputs (field inputs 16..19), but
not
the high speed encoder input. Note that the input threshold for MPG inputs
is
2.5V so the MPG output needs to swing close to ground for reliable operation





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Peter Wallace
Mesa Electronics

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Peter Wallace
Mesa Electronics

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Re: [Emc-users] linuxcnc openlung ventilators

[Dale Ertley via Emc-users]

  What is the chance that a BIPAP (twopressure system) machine could be used as 
a “first line” for a ventilator?  
A CPAP (single pressure system) may also work.
It might even work with an O2concentrator.

Pressures could be raised andlowered if necessary.
I don’t think it could be used with patientintubation.  
There are millions of them outthere.
Dale




 

On Monday, March 23, 2020, 08:10:05 AM EDT, TJoseph Powderly 
 wrote:  
 
 How can Linuxcnc people help with OpenLung?
https://gitlab.com/open-source-ventilator/OpenLung

tomp


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Re: [Emc-users] linuxcnc openlung ventilators

[Ralph Stirling]

I read that CPAP type machines may blow the
virus all over the room, so they are considered
dangerous for highly infectious COVID patients.

Take a look at the link I posted earlier to a document
about all the different medical devices needed and
the pros/cons for simple or home-made substitutions.

-- Ralph

From: Dale Ertley via Emc-users [emc-users@lists.sourceforge.net]
Sent: Monday, March 23, 2020 3:42 PM
To: Enhanced Machine Controller (EMC)
Cc: Dale Ertley
Subject: Re: [Emc-users] linuxcnc openlung ventilators

CAUTION: This email originated from outside the Walla Walla University email 
system.


  What is the chance that a BIPAP (twopressure system) machine could be used as 
a “first line” for a ventilator?
A CPAP (single pressure system) may also work.
It might even work with an O2concentrator.

Pressures could be raised andlowered if necessary.
I don’t think it could be used with patientintubation.
There are millions of them outthere.
Dale






On Monday, March 23, 2020, 08:10:05 AM EDT, TJoseph Powderly 
 wrote:

 How can Linuxcnc people help with OpenLung?
https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgitlab.com%2Fopen-source-ventilator%2FOpenLung&data=02%7C01%7Cralph.stirling%40wallawalla.edu%7C73c098647b664da6b70208d7cf7b8b62%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637206001852115033&sdata=%2BVj7ik7lTLlEO4%2FXPUeBeZFVCixMIAutUCMF%2BWvpm8U%3D&reserved=0

tomp


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Re: [Emc-users] linuxcnc openlung ventilators

[TJoseph Powderly]

yes
you need to know what a ventilator does
how it is installed into a person
and about the tool used to test that the tube is in the correct position.
That tool BMV is usually just for test, and it _could_be used for
longer term with a little hacking.

I watched videos on how professional machines are used.
Then looked at how bag mask valves are used
the considered what i could do if manufacturing  them was needed here.
its 20 minutes for your fellow man.

You would likely help build , not put tubes down throats.

thanks for looking at the idea
tomp

On Tue, Mar 24, 2020 at 12:31 AM Ralph Stirling
 wrote:
>
> I think this is required reading before jumping on the diy medical device 
> bandwagon.
>
> https://docs.google.com/document/d/1-71FJTmI1Q1kjSDLP0EegMERjg_0kk_7UfaRE4r66Mg/edit?usp=drivesdk
>
> -- Ralph
>
> On Mar 23, 2020 6:08 AM, TJoseph Powderly  wrote:
> CAUTION: This email originated from outside the Walla Walla University email 
> system.
>
>
> How can Linuxcnc people help with OpenLung?
> https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgitlab.com%2Fopen-source-ventilator%2FOpenLung&data=02%7C01%7Cralph.stirling%40wallawalla.edu%7C664b8912e4524122347e08d7cf22d88b%7Cd958f048e43142779c8debfb75e7aa64%7C0%7C0%7C637205620886050273&sdata=EEcLtpgC9Gz1NFYuNqYDt%2Bu1lHcS1G5EAzzHeZXEPfQ%3D&reserved=0
>
> tomp
>
>
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Re: [Emc-users] linuxcnc openlung ventilators

[Gene Heskett]

On Tuesday 24 March 2020 00:22:43 TJoseph Powderly wrote:

> yes
> you need to know what a ventilator does
> how it is installed into a person
> and about the tool used to test that the tube is in the correct
> position. That tool BMV is usually just for test, and it _could_be
> used for longer term with a little hacking.
>
> I watched videos on how professional machines are used.
> Then looked at how bag mask valves are used
> the considered what i could do if manufacturing  them was needed here.
> its 20 minutes for your fellow man.
>
> You would likely help build , not put tubes down throats.
>
> thanks for looking at the idea
> tomp

2 things for making such parts TomP.

1) proven rs274D gcode to see if it would run on our machines.  And specs 
for raw materials. Plastics for tool economy would be best, something we 
could cool with a plain water mist, fawncy coolants are $50 bucks a 
gallon

2) raw materials supplied, and a stipend for tool replacements. On SS, 
I'd have a hard time paying for tooling if was made from stuff that 
rapidly dulls tools.


Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


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Re: [Emc-users] Supplier for low-voltage (48V) servo motors?

[theman whosoldtheworld]

tamgawa is the best one, quality, price and flange ... plus it have
30mm 20mm and 16mm ...  about drive is not so fontastic ... but motors
is really ok.

But also someone have you suggested to use alibaba ... you can buy
outrunner motor and add some renishow inexpensive magnetic encoders
 also you need a brake ... for thee you can choose one from
alibaba ... actually I'm in search for a manufacturer ... if I find a
valid solution for sure i write here.

regards

Il giorno lun 23 mar 2020 alle ore 19:01 Nicklas Karlsson
 ha scritto:
>
> > Hi John, hi Andy!
> >
> > On 23.03.20 17:13, John Dammeyer wrote:
> > > In, Vancouver there is
> > > http://www.dmm-tech.com
> > >
> > > Any particular reason why you want 48V?  I use the Bergerda 220VAC units 
> > > and although shipping is expensive the motor/drive components do end up 
> > > costing less than the similar units from dmm-tech.
> >
> > ...
> > The reason for the 48V system is mainly safety, as it makes the design
> > so much simpler if you don't have to care about all the HV stuff inside
> > the machine. Everything else runs off 24V, there is no single wire
> > running through the machine carrying mains power.
>
> Common mode voltage will also be lower, maybe inductance for electric time 
> constant is lower and possibility to use MOFSET instead of IGBT might be a 
> third reason. Lower inductance make possible faster dynamic response as 
> torque change faster but also increase current ripple.
>
> > The drive system supports several standard encoder interfaces, but
> > nothing proprietary. Using the motor manufacturer's drive is not an
> > option, as all motion components need to be connected to a high speed
> > serial bus (similar to EtherCAT).
>
> Similar to Ethercat, Sercos?
>
> > Thanks and best regards,
> > Philipp
>
>
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