3D printable med supplies

[bitrex]

NIH page:

<https://3dprint.nih.gov/collections/covid-19-response?fbclid=IwAR13IabNCnpKZB152eoHqxD1lxTkEanZYBjyedFRsWDdOA9WlJpvMqkbF2M>

Like most "crowd-sourced" projects most of these designs are feel-good
bullshit that nobody will ever produce in significant quantity; their
creators only test on their own equipment and don't even bother to
provide much documentation or even the bare minimum of spec requirements
like what minimum printer volumes are required to make their designs,
what equipment was it been tested on, how long they take to turn out.

What base-plate area does one need? Print volume? no answers.

The top left "approved" design has almost no documentation at all and
seems optimized to only work on one particular $3000 machine.

Poorly-documented or undocumented vanity-projects are useless filler and
shouldn't even be accepted for review it's a waste of time to look at them.

 

[John Robertson]

On 2020/04/01 9:41 a.m., bitrex wrote:

NIH page:

https://3dprint.nih.gov/collections/covid-19-response?fbclid=IwAR13IabNCnpKZB152eoHqxD1lxTkEanZYBjyedFRsWDdOA9WlJpvMqkbF2M


Like most "crowd-sourced" projects most of these designs are feel-good
bullshit that nobody will ever produce in significant quantity; their
creators only test on their own equipment and don't even bother to
provide much documentation or even the bare minimum of spec requirements
like what minimum printer volumes are required to make their designs,
what equipment was it been tested on, how long they take to turn out.

What base-plate area does one need? Print volume? no answers.

The top left "approved" design has almost no documentation at all and
seems optimized to only work on one particular $3000 machine.

Poorly-documented or undocumented vanity-projects are useless filler and
shouldn't even be accepted for review it's a waste of time to look at them.

I disagree.

The disclaimer says it all:

---------------------(quote)------------------------------

March 25, 2020: This collection of designs was created to support the
manufacturing of personal protective equipment (PPE) or other necessary
medical devices that are in short supply due to the COVID-19 outbreak.
While many can be printed with a 3D printer at home or your local Maker
space, the NIH, FDA, VA, America Makes, and the contributing creators
cannot ensure the quality, safety, and efficacy of these designs when
manufactured without proper quality controls and processes.

This collection represents a coordinated effort among the FDA, VA, and
America Makes to connect healthcare providers and 3D printing
organizations. More information about this collaboration can be found in
the FDA announcement from March 27, 2020.
------------------(end quote)--------------------------------

It seems to me that it is a good starting point. These are for PERSONAL
devices. I am sure the 3D producers are gearing up to make industrial
levels of these.

I have an injection mold machine (Rabit 2/3) that is capable of making
up to 10,000 (2 grams or less) items a day, but it requires an aluminum
mold first, and it is restricted to plastic items weighing no more than
2 grams. So, my problem is, I have no idea what I can do to help. I also
don't have the tooling needed to make the mold (metal lath/milling
machine), but this machine is sitting idle - as far as I know it just
needs to be warmed up and some tests run...

What would you suggest that tech people with free time do to help with
this situation?

Are there other country's government sites aiming at the 3D printing
crowd for potentially useful applications of that technology?

John

 

[John Robertson]

On 2020/04/01 9:41 a.m., bitrex wrote:

NIH page:

https://3dprint.nih.gov/collections/covid-19-response?fbclid=IwAR13IabNCnpKZB152eoHqxD1lxTkEanZYBjyedFRsWDdOA9WlJpvMqkbF2M


....

Further to my post here is at least one site in Canada trying to get
business with skills involved:

https://www.ontario.ca/page/how-your-organization-can-help-fight-coronavirus

I am going to hunt for a similar site for my home province - British
Columbia. Perhaps my shop that repairs equipment (mind you commercial
entertainment games - pinball games and jukeboxes - a lot of mechanical,
EM, and solid state skill required) may have some additional use!


John

 

[bitrex]

On 4/1/2020 1:11 PM, John Robertson wrote:

On 2020/04/01 9:41 a.m., bitrex wrote:
NIH page:

https://3dprint.nih.gov/collections/covid-19-response?fbclid=IwAR13IabNCnpKZB152eoHqxD1lxTkEanZYBjyedFRsWDdOA9WlJpvMqkbF2M


Like most "crowd-sourced" projects most of these designs are feel-good
bullshit that nobody will ever produce in significant quantity; their
creators only test on their own equipment and don't even bother to
provide much documentation or even the bare minimum of spec
requirements like what minimum printer volumes are required to make
their designs, what equipment was it been tested on, how long they
take to turn out.

What base-plate area does one need? Print volume? no answers.

The top left "approved" design has almost no documentation at all and
seems optimized to only work on one particular $3000 machine.

Poorly-documented or undocumented vanity-projects are useless filler
and shouldn't even be accepted for review it's a waste of time to look
at them.

I disagree.

The disclaimer says it all:

---------------------(quote)------------------------------

March 25, 2020: This collection of designs was created to support the
manufacturing of personal protective equipment (PPE) or other necessary
medical devices that are in short supply due to the COVID-19 outbreak.
While many can be printed with a 3D printer at home or your local Maker
space, the NIH, FDA, VA, America Makes, and the contributing creators
cannot ensure the quality, safety, and efficacy of these designs when
manufactured without proper quality controls and processes.

This collection represents a coordinated effort among the FDA, VA, and
America Makes to connect healthcare providers and 3D printing
organizations. More information about this collaboration can be found in
the FDA announcement from March 27, 2020.
------------------(end quote)--------------------------------

It seems to me that it is a good starting point. These are for PERSONAL
devices.

I don't know what "personal" means in this context, what do individuals
outside a healthcare setting need with laminate face shields?

I am sure the 3D producers are gearing up to make industrial
levels of these.

What "3D producers" are going to produce them gratis as of right now
other than the people reading the site who have the skills and cash to
throw at the situation?

"This design has undergone review in a clinical setting and is
recommended when fabricated as instructed."

Can't do, don't have their particular toolchain, they don't offer
instructions or files for anything but the one tool they used as far as
I can tell. Can't check the second link for "DtM-v3.0" it seems to be
broken, great.

I have an injection mold machine (Rabit 2/3) that is capable of making
up to 10,000  (2 grams or less) items a day, but it requires an aluminum
mold first, and it is restricted to plastic items weighing no more than
2 grams. So, my problem is, I have no idea what I can do to help. I also
don't have the tooling needed to make the mold (metal lath/milling
machine), but this machine is sitting idle - as far as I know it just
needs to be warmed up and some tests run...

What would you suggest that tech people with free time do to help with
this situation?

Send money to an organization that's currently doing something real
until such time it becomes clear that any of these homebrew designs are
actually good for anything, when made by anyone but the people who
already seem to be doing it and been put on the approved-list (for
whatever reason.)

I could have a number of less-expensive 3D printers running nonstop
tomorrow if I were convinced that it would be a worthwhile investment
vs. just donating the cash. And if it seemed like the creators of the
one "approved" design I can actually look at seemed to care about its
applicability to equipment other than their own.

There was one face-shield project that was very well-documented that the
author had tested on a number of different machines and put the
requirements right there so anyone can see at a glance what equipment
they'd need to get started. The ones with good documentation are the
one's, y'know, if I were running the approval process would get
short-listed for testing.

Are there other country's government sites aiming at the 3D printing
crowd for potentially useful applications of that technology?

John

The thought is good, but like a lot of stuff the US is doing the
implementation looks haphazard there isn't time for haphazard.

 

[bitrex]

On 4/1/2020 1:18 PM, John Robertson wrote:

On 2020/04/01 9:41 a.m., bitrex wrote:
NIH page:

https://3dprint.nih.gov/collections/covid-19-response?fbclid=IwAR13IabNCnpKZB152eoHqxD1lxTkEanZYBjyedFRsWDdOA9WlJpvMqkbF2M


...

Further to my post here is at least one site in Canada trying to get
business with skills involved:

https://www.ontario.ca/page/how-your-organization-can-help-fight-coronavirus


I am going to hunt for a similar site for my home province - British
Columbia. Perhaps my shop that repairs equipment (mind you commercial
entertainment games - pinball games and jukeboxes - a lot of mechanical,
EM, and solid state skill required) may have some additional use!


John

It's nice to feel needed, and many engineers seem to have a need to feel
needed. But so far I'm unconvinced any of the skills I have, even
electronics design or 3D printing, will be of much relevance within the
time frame of probable most serious need, a couple months or so,
compared with just donating cash from my bank account to organizations
currently on the front-line that need it. time is short.

Powerlessness is an unpleasant feeling and who doesn't want to feel
they're personally doing something important? but the real "heroes"
would seem to be in other industries at the moment.

 

[Don Kuenz]

John Robertson <spam@flippers.com> wrote:

On 2020/04/01 9:41 a.m., bitrex wrote:
NIH page:

https://3dprint.nih.gov/collections/covid-19-response?fbclid=IwAR13IabNCnpKZB152eoHqxD1lxTkEanZYBjyedFRsWDdOA9WlJpvMqkbF2M

<snip>

The disclaimer says it all:

---------------------(quote)------------------------------

March 25, 2020: This collection of designs was created to support the
manufacturing of personal protective equipment (PPE) or other necessary
medical devices that are in short supply due to the COVID-19 outbreak.
While many can be printed with a 3D printer at home or your local Maker
space, the NIH, FDA, VA, America Makes, and the contributing creators
cannot ensure the quality, safety, and efficacy of these designs when
manufactured without proper quality controls and processes.

This collection represents a coordinated effort among the FDA, VA, and
America Makes to connect healthcare providers and 3D printing
organizations. More information about this collaboration can be found in
the FDA announcement from March 27, 2020.
------------------(end quote)--------------------------------

It seems to me that it is a good starting point. These are for PERSONAL
devices. I am sure the 3D producers are gearing up to make industrial
levels of these.

I have an injection mold machine (Rabit 2/3) that is capable of making
up to 10,000 (2 grams or less) items a day, but it requires an aluminum
mold first, and it is restricted to plastic items weighing no more than
2 grams. So, my problem is, I have no idea what I can do to help. I also
don't have the tooling needed to make the mold (metal lath/milling
machine), but this machine is sitting idle - as far as I know it just
needs to be warmed up and some tests run...

What would you suggest that tech people with free time do to help with
this situation?

Are there other country's government sites aiming at the 3D printing
crowd for potentially useful applications of that technology?

All available N95 masks are reserved for hospital use in my town. This
Tuesday one of my colleagues (a practicing physician) fashioned his own
personal N95 mask from a face mask and a piece of filter attached with
superglue temporarily held in place with staples until it cured.
Telemedicine also recently blossomed. doxy.me is in the process of
revolutionizing medicine and such systems will probably remain in use
even after COVID19 subsides.

Thank you,

--
Don Kuenz KB7RPU
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.

 

[bitrex]

On 4/1/2020 1:55 PM, bitrex wrote:

On 4/1/2020 1:18 PM, John Robertson wrote:
On 2020/04/01 9:41 a.m., bitrex wrote:
NIH page:

https://3dprint.nih.gov/collections/covid-19-response?fbclid=IwAR13IabNCnpKZB152eoHqxD1lxTkEanZYBjyedFRsWDdOA9WlJpvMqkbF2M


...

Further to my post here is at least one site in Canada trying to get
business with skills involved:

https://www.ontario.ca/page/how-your-organization-can-help-fight-coronavirus


I am going to hunt for a similar site for my home province - British
Columbia. Perhaps my shop that repairs equipment (mind you commercial
entertainment games - pinball games and jukeboxes - a lot of
mechanical, EM, and solid state skill required) may have some
additional use!


John

It's nice to feel needed, and many engineers seem to have a need to feel
needed. But so far I'm unconvinced any of the skills I have, even
electronics design or 3D printing, will be of much relevance within the
time frame of probable most serious need, a couple months or so,
compared with just donating cash from my bank account to organizations
currently on the front-line that need it. time is short.

Powerlessness is an unpleasant feeling and who doesn't want to feel
they're personally doing something important? but the real "heroes"
would seem to be in other industries at the moment.

Some hospitals in my area are accepting hand-built masks built to a good
quality from a design that has been distributed in the community.

A disabled woman I know who is very experienced in handicrafts is doing
that. For my part I never did learn to use a sewing machine.

 

[John Robertson]

On 2020/04/01 11:05 a.m., bitrex wrote:

On 4/1/2020 1:55 PM, bitrex wrote:
On 4/1/2020 1:18 PM, John Robertson wrote:
On 2020/04/01 9:41 a.m., bitrex wrote:
NIH page:

https://3dprint.nih.gov/collections/covid-19-response?fbclid=IwAR13IabNCnpKZB152eoHqxD1lxTkEanZYBjyedFRsWDdOA9WlJpvMqkbF2M


...

Further to my post here is at least one site in Canada trying to get
business with skills involved:

https://www.ontario.ca/page/how-your-organization-can-help-fight-coronavirus


I am going to hunt for a similar site for my home province - British
Columbia. Perhaps my shop that repairs equipment (mind you commercial
entertainment games - pinball games and jukeboxes - a lot of
mechanical, EM, and solid state skill required) may have some
additional use!


John

It's nice to feel needed, and many engineers seem to have a need to
feel needed. But so far I'm unconvinced any of the skills I have, even
electronics design or 3D printing, will be of much relevance within
the time frame of probable most serious need, a couple months or so,
compared with just donating cash from my bank account to organizations
currently on the front-line that need it. time is short.

Powerlessness is an unpleasant feeling and who doesn't want to feel
they're personally doing something important? but the real "heroes"
would seem to be in other industries at the moment.

Some hospitals in my area are accepting hand-built masks built to a good
quality from a design that has been distributed in the community.

A disabled woman I know who is very experienced in handicrafts is doing
that. For my part I never did learn to use a sewing machine.

My sister-in-law is making cloth masks at the request of her local
hospital, she is a master seamstress though.

John

 

[bitrex]

On 4/1/2020 2:56 PM, John Robertson wrote:

On 2020/04/01 11:05 a.m., bitrex wrote:
On 4/1/2020 1:55 PM, bitrex wrote:
On 4/1/2020 1:18 PM, John Robertson wrote:
On 2020/04/01 9:41 a.m., bitrex wrote:
NIH page:

https://3dprint.nih.gov/collections/covid-19-response?fbclid=IwAR13IabNCnpKZB152eoHqxD1lxTkEanZYBjyedFRsWDdOA9WlJpvMqkbF2M


...

Further to my post here is at least one site in Canada trying to get
business with skills involved:

https://www.ontario.ca/page/how-your-organization-can-help-fight-coronavirus


I am going to hunt for a similar site for my home province - British
Columbia. Perhaps my shop that repairs equipment (mind you
commercial entertainment games - pinball games and jukeboxes - a lot
of mechanical, EM, and solid state skill required) may have some
additional use!


John

It's nice to feel needed, and many engineers seem to have a need to
feel needed. But so far I'm unconvinced any of the skills I have,
even electronics design or 3D printing, will be of much relevance
within the time frame of probable most serious need, a couple months
or so, compared with just donating cash from my bank account to
organizations currently on the front-line that need it. time is short.

Powerlessness is an unpleasant feeling and who doesn't want to feel
they're personally doing something important? but the real "heroes"
would seem to be in other industries at the moment.

Some hospitals in my area are accepting hand-built masks built to a
good quality from a design that has been distributed in the community.

A disabled woman I know who is very experienced in handicrafts is
doing that. For my part I never did learn to use a sewing machine.

My sister-in-law is making cloth masks at the request of her local
hospital, she is a master seamstress though.

John

"But she's nobody's hero...saves a drowning child. cures a wasting
disease. A hero...lands a crippled airplane, solves great mysteries..."

 

[John Robertson]

On 2020/04/01 1:04 p.m., bitrex wrote:

On 4/1/2020 2:56 PM, John Robertson wrote:
On 2020/04/01 11:05 a.m., bitrex wrote:
On 4/1/2020 1:55 PM, bitrex wrote:
On 4/1/2020 1:18 PM, John Robertson wrote:
On 2020/04/01 9:41 a.m., bitrex wrote:
NIH page:

https://3dprint.nih.gov/collections/covid-19-response?fbclid=IwAR13IabNCnpKZB152eoHqxD1lxTkEanZYBjyedFRsWDdOA9WlJpvMqkbF2M


...

Further to my post here is at least one site in Canada trying to
get business with skills involved:

https://www.ontario.ca/page/how-your-organization-can-help-fight-coronavirus


I am going to hunt for a similar site for my home province -
British Columbia. Perhaps my shop that repairs equipment (mind you
commercial entertainment games - pinball games and jukeboxes - a
lot of mechanical, EM, and solid state skill required) may have
some additional use!


John

It's nice to feel needed, and many engineers seem to have a need to
feel needed. But so far I'm unconvinced any of the skills I have,
even electronics design or 3D printing, will be of much relevance
within the time frame of probable most serious need, a couple months
or so, compared with just donating cash from my bank account to
organizations currently on the front-line that need it. time is short.

Powerlessness is an unpleasant feeling and who doesn't want to feel
they're personally doing something important? but the real "heroes"
would seem to be in other industries at the moment.

Some hospitals in my area are accepting hand-built masks built to a
good quality from a design that has been distributed in the community.

A disabled woman I know who is very experienced in handicrafts is
doing that. For my part I never did learn to use a sewing machine.

My sister-in-law is making cloth masks at the request of her local
hospital, she is a master seamstress though.

John

"But she's nobody's hero...saves a drowning child. cures a wasting
disease. A hero...lands a crippled airplane, solves great mysteries..."

Just another Canadian band...

John ;-#)#

 

[John Robertson]

On 2020/04/01 1:04 p.m., bitrex wrote:

On 4/1/2020 2:56 PM, John Robertson wrote:
On 2020/04/01 11:05 a.m., bitrex wrote:
On 4/1/2020 1:55 PM, bitrex wrote:
On 4/1/2020 1:18 PM, John Robertson wrote:
On 2020/04/01 9:41 a.m., bitrex wrote:
NIH page:

https://3dprint.nih.gov/collections/covid-19-response?fbclid=IwAR13IabNCnpKZB152eoHqxD1lxTkEanZYBjyedFRsWDdOA9WlJpvMqkbF2M


...

Further to my post here is at least one site in Canada trying to
get business with skills involved:

https://www.ontario.ca/page/how-your-organization-can-help-fight-coronavirus


I am going to hunt for a similar site for my home province -
British Columbia. Perhaps my shop that repairs equipment (mind you
commercial entertainment games - pinball games and jukeboxes - a
lot of mechanical, EM, and solid state skill required) may have
some additional use!


John

It's nice to feel needed, and many engineers seem to have a need to
feel needed. But so far I'm unconvinced any of the skills I have,
even electronics design or 3D printing, will be of much relevance
within the time frame of probable most serious need, a couple months
or so, compared with just donating cash from my bank account to
organizations currently on the front-line that need it. time is short.

Powerlessness is an unpleasant feeling and who doesn't want to feel
they're personally doing something important? but the real "heroes"
would seem to be in other industries at the moment.

Some hospitals in my area are accepting hand-built masks built to a
good quality from a design that has been distributed in the community.

A disabled woman I know who is very experienced in handicrafts is
doing that. For my part I never did learn to use a sewing machine.

My sister-in-law is making cloth masks at the request of her local
hospital, she is a master seamstress though.

John

"But she's nobody's hero...saves a drowning child. cures a wasting
disease. A hero...lands a crippled airplane, solves great mysteries..."

https://www.youtube.com/watch?v=0ZokLZV35MI

John :-#)#

 

[legg]

On Wed, 1 Apr 2020 11:56:27 -0700, John Robertson <spam@flippers.com>
wrote:

<snip>

Some hospitals in my area are accepting hand-built masks built to a good
quality from a design that has been distributed in the community.

A disabled woman I know who is very experienced in handicrafts is doing
that. For my part I never did learn to use a sewing machine.

My sister-in-law is making cloth masks at the request of her local
hospital, she is a master seamstress though.

Sewing machines are becoming a rarity in households.

I've got one, and use it fairly regularly to replace zippers,
canvas and denim wearout. The skills required to do a typical
double layer surgical mask are not advanced, in any way.

If you've got a demand (ie hospital or nursing home request),
you'd go by their preferences, or duplicate their sample.

Both University of Edinburgh and Cambridge University have
run tests on different mask types. The 'Smart Air' company
flogs smog masks to urban exercisers, but has a useful blog
conveying these results.

https://smartairfilters.com/en/blog/do-pollution-masks-work/
https://smartairfilters.com/en/blog/diy-homemade-mask-protect-virus-coronavirus/
https://smartairfilters.com/en/blog/best-materials-make-diy-face-mask-virus/
https://smartairfilters.com/en/blog/coronavirus-pollution-masks-n95-surgical-mask/

Construction examples, with links to a video for one basic type:

https://sarahmaker.com/how-to-sew-a-surgical-face-mask-for-hospitals-free-pattern/

These things have to be used knowledgably, with minimal face
touching and sensible handwashing - they don't protect your eyes
from projectiles or fingers.

RL

 

[Michael Terrell]

On Wednesday, April 1, 2020 at 8:21:53 PM UTC-4, legg wrote:

Sewing machines are becoming a rarity in households.

I've got one, and use it fairly regularly to replace zippers,
canvas and denim wearout. The skills required to do a typical
double layer surgical mask are not advanced, in any way.

If you've got a demand (ie hospital or nursing home request),
you'd go by their preferences, or duplicate their sample.

Both University of Edinburgh and Cambridge University have
run tests on different mask types. The 'Smart Air' company
flogs smog masks to urban exercisers, but has a useful blog
conveying these results.

https://smartairfilters.com/en/blog/do-pollution-masks-work/
https://smartairfilters.com/en/blog/diy-homemade-mask-protect-virus-coronavirus/
https://smartairfilters.com/en/blog/best-materials-make-diy-face-mask-virus/
https://smartairfilters.com/en/blog/coronavirus-pollution-masks-n95-surgical-mask/

Construction examples, with links to a video for one basic type:

https://sarahmaker.com/how-to-sew-a-surgical-face-mask-for-hospitals-free-pattern/

These things have to be used knowledgeably, with minimal face
touching and sensible handwashing - they don't protect your eyes
from projectiles or fingers.

My mother wore out seven commercial grade sewing machines during her life.

 

[Chris Jones]

On 02/04/2020 04:55, bitrex wrote:

On 4/1/2020 1:18 PM, John Robertson wrote:
On 2020/04/01 9:41 a.m., bitrex wrote:
NIH page:

https://3dprint.nih.gov/collections/covid-19-response?fbclid=IwAR13IabNCnpKZB152eoHqxD1lxTkEanZYBjyedFRsWDdOA9WlJpvMqkbF2M


...

Further to my post here is at least one site in Canada trying to get
business with skills involved:

https://www.ontario.ca/page/how-your-organization-can-help-fight-coronavirus


I am going to hunt for a similar site for my home province - British
Columbia. Perhaps my shop that repairs equipment (mind you commercial
entertainment games - pinball games and jukeboxes - a lot of
mechanical, EM, and solid state skill required) may have some
additional use!


John

It's nice to feel needed, and many engineers seem to have a need to feel
needed. But so far I'm unconvinced any of the skills I have, even
electronics design or 3D printing, will be of much relevance within the
time frame of probable most serious need, a couple months or so,
compared with just donating cash from my bank account to organizations
currently on the front-line that need it. time is short.

In the UK they are asking for engineers to volunteer for jobs
maintaining and repairing medical equipment:

https://www.raeng.org.uk/publications/other/auxiliary-engineering-support-job-description

 

[Michael Terrell]

On Thursday, April 2, 2020 at 8:13:04 AM UTC-4, legg wrote:

On Wed, 1 Apr 2020 18:10:37 -0700 (PDT), Michael Terrell wrote:

On Wednesday, April 1, 2020 at 8:21:53 PM UTC-4, legg wrote:

Sewing machines are becoming a rarity in households.

I've got one, and use it fairly regularly to replace zippers,
canvas and denim wearout. The skills required to do a typical
double layer surgical mask are not advanced, in any way.

If you've got a demand (ie hospital or nursing home request),
you'd go by their preferences, or duplicate their sample.

Both University of Edinburgh and Cambridge University have
run tests on different mask types. The 'Smart Air' company
flogs smog masks to urban exercisers, but has a useful blog
conveying these results.

https://smartairfilters.com/en/blog/do-pollution-masks-work/
https://smartairfilters.com/en/blog/diy-homemade-mask-protect-virus-coronavirus/
https://smartairfilters.com/en/blog/best-materials-make-diy-face-mask-virus/
https://smartairfilters.com/en/blog/coronavirus-pollution-masks-n95-surgical-mask/

Construction examples, with links to a video for one basic type:

https://sarahmaker.com/how-to-sew-a-surgical-face-mask-for-hospitals-free-pattern/

These things have to be used knowledgeably, with minimal face
touching and sensible handwashing - they don't protect your eyes
from projectiles or fingers.


My mother wore out seven commercial grade sewing machines during her life.

Mine taught sewing at the high school. Was nearly retired before
she allowed herself a machine she felt was a good one, and a dedicated
serger.

How do you wear out a commercial machine? I've seen units in daily
use for a half century - you just swap out the parts as they go.

They would reach a point that the repairman would refuse to work on them.. She oiled them daily, but two of them wore out the camshaft. I replaced dozens of motors and speed controllers for her, as well. These were commercial, not industrial rated. She didn't buy any that did fancy stitches, like many of her customers did. I heard her tell one customer, "If that fancy machine is so great, why are you asking me to do this job?" "It's being repaired, again." My mom did a lot of weddings, and sewed a lot of heavy fabrics which put a heavy load on her machines. She wasn't far from needing another new machine when she died, in her early 50s.

 

[legg]

On Wed, 1 Apr 2020 18:10:37 -0700 (PDT), Michael Terrell
<terrell.michael.a@gmail.com> wrote:

On Wednesday, April 1, 2020 at 8:21:53 PM UTC-4, legg wrote:

Sewing machines are becoming a rarity in households.

I've got one, and use it fairly regularly to replace zippers,
canvas and denim wearout. The skills required to do a typical
double layer surgical mask are not advanced, in any way.

If you've got a demand (ie hospital or nursing home request),
you'd go by their preferences, or duplicate their sample.

Both University of Edinburgh and Cambridge University have
run tests on different mask types. The 'Smart Air' company
flogs smog masks to urban exercisers, but has a useful blog
conveying these results.

https://smartairfilters.com/en/blog/do-pollution-masks-work/
https://smartairfilters.com/en/blog/diy-homemade-mask-protect-virus-coronavirus/
https://smartairfilters.com/en/blog/best-materials-make-diy-face-mask-virus/
https://smartairfilters.com/en/blog/coronavirus-pollution-masks-n95-surgical-mask/

Construction examples, with links to a video for one basic type:

https://sarahmaker.com/how-to-sew-a-surgical-face-mask-for-hospitals-free-pattern/

These things have to be used knowledgeably, with minimal face
touching and sensible handwashing - they don't protect your eyes
from projectiles or fingers.


My mother wore out seven commercial grade sewing machines during her life.

Mine taught sewing at the high school. Was nearly retired before
she allowed herself a machine she felt was a good one, and a dedicated
serger.

How do you wear out a commercial machine? I've seen units in daily
use for a half century - you just swap out the parts as they go.

RL

 

[dcaster@krl.org]

On Wednesday, April 1, 2020 at 1:12:09 PM UTC-4, John Robertson wrote:

I have an injection mold machine (Rabit 2/3) that is capable of making
up to 10,000 (2 grams or less) items a day, but it requires an aluminum
mod first, and it is restricted to plastic items weighing no more than
2 grams. So, my problem is, I have no idea what I can do to help. I also
don't have the tooling needed to make the mold (metal lath/milling
machine), but this machine is sitting idle - as far as I know it just
needs to be warmed up and some tests run...

https://www.dw.com/en/chinese-tycoon-missing-after-criticizing-coronavirus-response/a-52780850

John

_Do you have any interest in selling the irjectior molding machine?

And if you do, where are you located?


_I am in Delaware and have an acquaintance with a machine
shop who should be interested.

Dan

 

[John Robertson]

On 2020/04/03 9:40 a.m., dcaster@krl.org wrote:

On Wednesday, April 1, 2020 at 1:12:09 PM UTC-4, John Robertson wrote:



I have an injection mold machine (Rabit 2/3) that is capable of making
up to 10,000 (2 grams or less) items a day, but it requires an aluminum
mod first, and it is restricted to plastic items weighing no more than
2 grams. So, my problem is, I have no idea what I can do to help. I also
don't have the tooling needed to make the mold (metal lath/milling
machine), but this machine is sitting idle - as far as I know it just
needs to be warmed up and some tests run...

https://www.dw.com/en/chinese-tycoon-missing-after-criticizing-coronavirus-response/a-52780850

John

_Do you have any interest in selling the irjectior molding machine?

And if you do, where are you located?


_I am in Delaware and have an acquaintance with a machine
shop who should be interested.

Dan

Hi Dan,

I have no plans to sell the machine at this time, plus I am on the west
coast of Canada so shipping would be painful. I would imagine there are
much closer Rabit 2/3s to you. eBay has many injection mold machines
that would be cheaper than my Rabit.

My intent was to use it for manufacturing parts for arcade games, and I
thought perhaps it could be useful now. The problem is the size and
weight restriction, nothing over 2 grams, and it pretty much has to be
under 6cc in volume. Currently it is set up to make tiny nylon balls,
much the size of airsoft balls. It was last running three or four years
ago when I bought it.

I bought a second Rabit 2/3 off eBay but it needs restoration...

John :-#)#

 

[dcaster@krl.org]

On Friday, April 3, 2020 at 2:11:18 PM UTC-4, John Robertson wrote:

On 2020/04/03 9:40 a.m., dcaster@krl.org wrote:
On Wednesday, April 1, 2020 at 1:12:09 PM UTC-4, John Robertson wrote:



I have an injection mold machine (Rabit 2/3) that is capable of making
up to 10,000 (2 grams or less) items a day, but it requires an aluminum
mod first, and it is restricted to plastic items weighing no more than
2 grams. So, my problem is, I have no idea what I can do to help. I also
don't have the tooling needed to make the mold (metal lath/milling
machine), but this machine is sitting idle - as far as I know it just
needs to be warmed up and some tests run...

https://www.dw.com/en/chinese-tycoon-missing-after-criticizing-coronavirus-response/a-52780850

John

_Do you have any interest in selling the irjectior molding machine?

And if you do, where are you located?


_I am in Delaware and have an acquaintance with a machine
shop who should be interested.

Dan


Hi Dan,

I have no plans to sell the machine at this time, plus I am on the west
coast of Canada so shipping would be painfinteligenceul. I would imagine there are
much closer Rabit 2/3s to you. eBay has many injection mold machines
that would be cheaper than my Rabit.

My intent was to use it for manufacturinginteligence parts for arcade games, and I
thought perhaps it could be useful now. Tinteligencehe problem is the size and
weight restriction, nothing over 2 grams, and it pretty much has to be
under 6cc in volume. Currently it is set to make tiny nylon balls,
much the size of airsoft balls. It was last running three or four years
ago when I bought it.

I bought a second Rabit 2/3 off eBay but it needs restoration...

John :-#)#

Well it was a thought. The shop owner is running the shop without any employees and needs to have something that will run with out needing an operator full time. Too much of his time is spent on all the book keeping, estimating etc.

Dan