|
And once the inside gets hot, it takes longer to cool it down, as the insulation keeps the heat in
ralphie
Dave,?
Insulation DOES NOT STOP heat
permeation/infiltration, It simply slows it down, (13 times or 30
times no insulation at all),
so that a smaller cooling source, or
heating source in winter, can more easily maintain a temperature
inside the insulated container,
keeping the conditioned space more
resistant to outside temperatures, not immune.?
What kind of windows do you have?
Windows are very energy inefficient, no matter what they say about
them.?
Windows will never equal walls in
insulation value....
Sorry for your heat, was 101 here in
Atlanta for 1 day
Stay safe!
On 7/6/2024 9:53 PM, davesmith1800
wrote:
When into my hobby shop and was 114° it insulated R13 walls
ceiling R30.?
My wife and doctor does want working hot weather so put some of my
projects on hold till getting cooler.?
At less paint dries fast.?
PS see you are very close to where I live
Dave?
On Sat, Jul 6, 2024 at 06:35 PM, gcvisalia@... wrote:
?
Yea, just a few degree cooler here in visalia. But still
hot enough to melt things. Sunday will be 113.
?
george
?
On Saturday, July 6, 2024 at 03:35:16 PM PDT,
davesmith1800 <davesmith1@...> wrote: ?
?
I was wondering why
fleeling Hot?
Check tv . No one is letting run my mini lathe.
|
Speaking?of heat, some of you might be interested in a modification I made to my minilathe about 15?years ago. To keep the electronics from overheating, I drilled holes in the cover with screening on the inside so no swarf would get in. I have no idea whether this helped or not,? but it can't hurt.
Mike Taglieri?
On Sun, Jul 7, 2024, 1:07 AM Ralph Lehotsky via <ralphlehotsky= [email protected]> wrote: And once the inside gets hot, it takes longer to cool it down, as the insulation keeps the heat in
ralphie
Dave,?
Insulation DOES NOT STOP heat
permeation/infiltration, It simply slows it down, (13 times or 30
times no insulation at all),
so that a smaller cooling source, or
heating source in winter, can more easily maintain a temperature
inside the insulated container,
keeping the conditioned space more
resistant to outside temperatures, not immune.?
What kind of windows do you have?
Windows are very energy inefficient, no matter what they say about
them.?
Windows will never equal walls in
insulation value....
Sorry for your heat, was 101 here in
Atlanta for 1 day
Stay safe!
On 7/6/2024 9:53 PM, davesmith1800
wrote:
When into my hobby shop and was 114° it insulated R13 walls
ceiling R30.?
My wife and doctor does want working hot weather so put some of my
projects on hold till getting cooler.?
At less paint dries fast.?
PS see you are very close to where I live
Dave?
On Sat, Jul 6, 2024 at 06:35 PM, gcvisalia@... wrote:
?
Yea, just a few degree cooler here in visalia. But still
hot enough to melt things. Sunday will be 113.
?
george
?
On Saturday, July 6, 2024 at 03:35:16 PM PDT,
davesmith1800 <davesmith1@...> wrote: ?
?
I was wondering why
fleeling Hot?
Check tv . No one is letting run my mini lathe.
|
I added a computer fan to mine.
|
I like cooling fans.?
Even inside point at board like do for computer's.??
Motors that are TEFC have fan inside and a fan out side to cool the motor.? Sometimes uses a aluminum end cap fir better heat transfer.?
Right I just have temperature gauge and have to wait for cooler weather any way.
We have to think of way to keep the mini lathe electronics and use as the earth ? warms up again.?
Where live has always had problems keeping electronics like mini lathe controls cool in summer.? In 1905 it was 115°F
I would say more but getting off subject.?
I am on different group where have off subject thread but the old Yahoo groups have no opinion.? Which is a dilemma for moderates here.?
Even on https://www.homemodelenginemachinist.com/ where I am a moderator we have our limits on the off subject content.?
On https://weldingweb.com they to had to put limit on the off subject thread.?
So I can see the moderators trying figure out because you need post to keep the group alive so everyone stays but still want stay on subject.??
If only Yahoo had add more one thread this would never be a problem today.??
Dave?
toggle quoted message
Show quoted text
On Sun, Jul 7, 2024 at 07:40 AM, Pierre Geoffrion wrote:
I added a computer fan to mine.
?
|
On my lathe The bottom is open by? design by manufacturer.? As long the chip do not jump high it will work . My lathe is a 2023 model maybe they working on over heating .?
It is to hot for photo
Dave?
toggle quoted message
Show quoted text
On Sat, Jul 6, 2024 at 11:30 PM, Miket_NYC wrote:
Speaking?of heat, some of you might be interested in a modification I made to my minilathe about 15?years ago. To keep the electronics from overheating, I drilled holes in the cover with screening on the inside so no swarf would get in. I have no idea whether this helped or not,? but it can't hurt.
?
Mike Taglieri?
On Sun, Jul 7, 2024, 1:07 AM Ralph Lehotsky via <ralphlehotsky= [email protected]> wrote:
And once the inside gets hot, it takes longer to cool it down, as the insulation keeps the heat in
?
ralphie
Dave,?
Insulation DOES NOT STOP heat permeation/infiltration, It simply slows it down, (13 times or 30 times no insulation at all),
so that a smaller cooling source, or heating source in winter, can more easily maintain a temperature inside the insulated container,
keeping the conditioned space more resistant to outside temperatures, not immune.?
What kind of windows do you have? Windows are very energy inefficient, no matter what they say about them.?
Windows will never equal walls in insulation value....
?
Sorry for your heat, was 101 here in Atlanta for 1 day
?
Stay safe!
?
?
On 7/6/2024 9:53 PM, davesmith1800 wrote:
When into my hobby shop and was 114° it insulated R13 walls ceiling R30.?
My wife and doctor does want working hot weather so put some of my projects on hold till getting cooler.?
At less paint dries fast.?
PS see you are very close to where I live
Dave?
On Sat, Jul 6, 2024 at 06:35 PM, gcvisalia@... wrote:
?
Yea, just a few degree cooler here in visalia. But still hot enough to melt things. Sunday will be 113.
?
george
?
On Saturday, July 6, 2024 at 03:35:16 PM PDT, davesmith1800 <davesmith1@...> wrote: ?
?
I was wondering why fleeling Hot? Check tv . No one is letting run my mini lathe. ![]()
?
?
?
|
It will take longer if no helper is
present, it takes just as long for the heat or cold to permeate in
either direction, an A/C or heater will go as fast as it ever
did...
5000 BTUs window A/C or 1000W Space
Heater...
On 7/7/2024 1:06 AM, Ralph Lehotsky
wrote:
toggle quoted message
Show quoted text
And
once the inside gets hot, it takes longer to cool it down, as
the insulation keeps the heat in
ralphie
Dave,?
Insulation DOES NOT STOP heat permeation/infiltration,
It simply slows it down, (13 times or 30 times no
insulation at all),
so that a smaller cooling source, or heating source in
winter, can more easily maintain a temperature inside the
insulated container,
keeping the conditioned space more resistant to outside
temperatures, not immune.?
What kind of windows do you have? Windows are very
energy inefficient, no matter what they say about them.?
Windows will never equal walls in insulation value....
Sorry for your heat, was 101 here in Atlanta for 1 day
Stay safe!
On 7/6/2024 9:53 PM, davesmith1800 wrote:
When into my hobby shop and was
114° it insulated R13 walls ceiling R30.?
My wife and doctor does want working hot weather so put
some of my projects on hold till getting cooler.?
At less paint dries fast.?
PS see you are very close to where I live
Dave?
On Sat, Jul 6, 2024 at 06:35 PM, gcvisalia@...
wrote:
?
Yea, just a few degree cooler here in visalia.
But still hot enough to melt things. Sunday will be
113.
?
george
?
On Saturday, July 6, 2024 at 03:35:16 PM PDT,
davesmith1800 <davesmith1@...>
wrote: ?
?
I was wondering why
fleeling Hot?
Check tv . No one is letting run my mini
lathe.
|
Harbor Freight does it on their 44991
Mini Mill, + a small fan as well
On 7/7/2024 2:30 AM, Miket_NYC wrote:
toggle quoted message
Show quoted text
Speaking?of heat, some of you might be interested
in a modification I made to my minilathe about 15?years ago. To
keep the electronics from overheating, I drilled holes in the
cover with screening on the inside so no swarf would get in. I
have no idea whether this helped or not,? but it can't hurt.
Mike Taglieri?
On Sun, Jul 7, 2024, 1:07 AM
Ralph Lehotsky via
<ralphlehotsky= [email protected]>
wrote:
And once
the inside gets hot, it takes longer to cool it down, as
the insulation keeps the heat in
ralphie
Dave,?
Insulation DOES NOT STOP heat
permeation/infiltration, It simply slows it down, (13
times or 30 times no insulation at all),
so that a smaller cooling source, or heating source
in winter, can more easily maintain a temperature
inside the insulated container,
keeping the conditioned space more resistant to
outside temperatures, not immune.?
What kind of windows do you have? Windows are very
energy inefficient, no matter what they say about
them.?
Windows will never equal walls in insulation
value....
Sorry for your heat, was 101 here in Atlanta for 1
day
Stay safe!
On 7/6/2024 9:53 PM, davesmith1800 wrote:
When into my hobby shop and was
114° it insulated R13 walls ceiling R30.?
My wife and doctor does want working hot weather so
put some of my projects on hold till getting cooler.?
At less paint dries fast.?
PS see you are very close to where I live
Dave?
On Sat, Jul 6, 2024 at 06:35 PM, gcvisalia@...
wrote:
?
Yea, just a few degree cooler here in
visalia. But still hot enough to melt things.
Sunday will be 113.
?
george
?
On Saturday, July 6, 2024 at 03:35:16 PM
PDT, davesmith1800 <davesmith1@...>
wrote: ?
?
I
was wondering why fleeling Hot?
Check tv . No one is letting run my mini
lathe.
Attachments:
|
On Jul 6, 2024, at 11:30?PM, Miket_NYC via groups.io <mctaglieri@...> wrote:
Speaking?of heat, some of you might be interested in a modification I made to my minilathe about 15?years ago. To keep the electronics from overheating, I drilled holes in the cover with screening on the inside so no swarf would get in. I have no idea whether this helped or not,? but it can't hurt.
Most of the parts are rated for at least 80C. Parts will work OK even if they are so hot they ould burn your skin. ? ? That said service life can depend on temperature.
With air cooling, the cooling efferct depends on the square root of the air velocity. ?So you get the most gain with the fist small amount of airflow and then after that diminishing return
The first increment is simple convection. ?Hot air raises and creates air motion. ?Better if you put hole in ther top and in the bottom. ? The lower holes are just as important as the holes near the top. ?The idea is to allow the air to flow. ? ? ? Then if there is not enough movement by convection, add a fan. ? ? Ideally you keep the electronics at about 40C or less. On Sun, Jul 7, 2024, 1:07 AM Ralph Lehotsky via <ralphlehotsky= [email protected]> wrote: And once the inside gets hot, it takes longer to cool it down, as the insulation keeps the heat in
ralphie
Dave,?
Insulation DOES NOT STOP heat
permeation/infiltration, It simply slows it down, (13 times or 30
times no insulation at all),
so that a smaller cooling source, or
heating source in winter, can more easily maintain a temperature
inside the insulated container,
keeping the conditioned space more
resistant to outside temperatures, not immune.?
What kind of windows do you have?
Windows are very energy inefficient, no matter what they say about
them.?
Windows will never equal walls in
insulation value....
Sorry for your heat, was 101 here in
Atlanta for 1 day
Stay safe!
On 7/6/2024 9:53 PM, davesmith1800
wrote:
When into my hobby shop and was 114° it insulated R13 walls
ceiling R30.?
My wife and doctor does want working hot weather so put some of my
projects on hold till getting cooler.?
At less paint dries fast.?
PS see you are very close to where I live
Dave?
On Sat, Jul 6, 2024 at 06:35 PM, gcvisalia@... wrote:
?
Yea, just a few degree cooler here in visalia. But still
hot enough to melt things. Sunday will be 113.
?
george
?
On Saturday, July 6, 2024 at 03:35:16 PM PDT,
davesmith1800 <davesmith1@...> wrote: ?
?
I was wondering why
fleeling Hot?
Check tv . No one is letting run my mini lathe.
Attachments:
|
40°C is 104°F?
Try living where the temperature is in normal will 110°F 43.3°C?
Cooling becomes a big problem?
Dave?
toggle quoted message
Show quoted text
On Sun, Jul 7, 2024 at 11:03 AM, Chris Albertson wrote:
On Jul 6, 2024, at 11:30?PM, Miket_NYC via groups.io <mctaglieri@...> wrote:
Speaking?of heat, some of you might be interested in a modification I made to my minilathe about 15?years ago. To keep the electronics from overheating, I drilled holes in the cover with screening on the inside so no swarf would get in. I have no idea whether this helped or not,? but it can't hurt.
?
Most of the parts are rated for at least 80C. Parts will work OK even if they are so hot they ould burn your skin. ? ? That said service life can depend on temperature.
?
With air cooling, the cooling efferct depends on the square root of the air velocity. ?So you get the most gain with the fist small amount of airflow and then after that diminishing return
?
The first increment is simple convection. ?Hot air raises and creates air motion. ?Better if you put hole in ther top and in the bottom. ? The lower holes are just as important as the holes near the top. ?The idea is to allow the air to flow. ? ? ? Then if there is not enough movement by convection, add a fan. ? ? Ideally you keep the electronics at about 40C or less.
On Sun, Jul 7, 2024, 1:07 AM Ralph Lehotsky via <ralphlehotsky= [email protected]> wrote:
And once the inside gets hot, it takes longer to cool it down, as the insulation keeps the heat in
?
ralphie
Dave,?
Insulation DOES NOT STOP heat permeation/infiltration, It simply slows it down, (13 times or 30 times no insulation at all),
so that a smaller cooling source, or heating source in winter, can more easily maintain a temperature inside the insulated container,
keeping the conditioned space more resistant to outside temperatures, not immune.?
What kind of windows do you have? Windows are very energy inefficient, no matter what they say about them.?
Windows will never equal walls in insulation value....
?
Sorry for your heat, was 101 here in Atlanta for 1 day
?
Stay safe!
?
?
On 7/6/2024 9:53 PM, davesmith1800 wrote:
When into my hobby shop and was 114° it insulated R13 walls ceiling R30.?
My wife and doctor does want working hot weather so put some of my projects on hold till getting cooler.?
At less paint dries fast.?
PS see you are very close to where I live
Dave?
On Sat, Jul 6, 2024 at 06:35 PM, gcvisalia@... wrote:
?
Yea, just a few degree cooler here in visalia. But still hot enough to melt things. Sunday will be 113.
?
george
?
On Saturday, July 6, 2024 at 03:35:16 PM PDT, davesmith1800 <davesmith1@...> wrote: ?
?
I was wondering why fleeling Hot? Check tv . No one is letting run my mini lathe. ![]()
?
?
?
?
?
Attachments:
|
Yes, You are correct. ?The best you can expect with forced air cooling is to cool the part to ambient temperature. ? You can of course, never get there, no matter how big the fan. ? ?
But again the parts are spec’d for 80C and even in another 50 years it will likely never get to 80C on Earth. ?
toggle quoted message
Show quoted text
On Jul 7, 2024, at 4:27?PM, davesmith1800 via groups.io <davesmith1@...> wrote:
40°C is 104°F? Try living where the temperature is in normal will 110°F 43.3°C? Cooling becomes a big problem? Dave? On Sun, Jul 7, 2024 at 11:03 AM, Chris Albertson wrote:
On Jul 6, 2024, at 11:30?PM, Miket_NYC via groups.io <mctaglieri@...> wrote:
Speaking?of heat, some of you might be interested in a modification I made to my minilathe about 15?years ago. To keep the electronics from overheating, I drilled holes in the cover with screening on the inside so no swarf would get in. I have no idea whether this helped or not,? but it can't hurt.
?
Most of the parts are rated for at least 80C. Parts will work OK even if they are so hot they ould burn your skin. ? ? That said service life can depend on temperature.
?
With air cooling, the cooling efferct depends on the square root of the air velocity. ?So you get the most gain with the fist small amount of airflow and then after that diminishing return
?
The first increment is simple convection. ?Hot air raises and creates air motion. ?Better if you put hole in ther top and in the bottom. ? The lower holes are just as important as the holes near the top. ?The idea is to allow the air to flow. ? ? ? Then if there is not enough movement by convection, add a fan. ? ? Ideally you keep the electronics at about 40C or less.
On Sun, Jul 7, 2024, 1:07 AM Ralph Lehotsky via <ralphlehotsky= [email protected]> wrote:
And once the inside gets hot, it takes longer to cool it down, as the insulation keeps the heat in
?
ralphie
Dave,?
Insulation DOES NOT STOP heat permeation/infiltration, It simply slows it down, (13 times or 30 times no insulation at all),
so that a smaller cooling source, or heating source in winter, can more easily maintain a temperature inside the insulated container,
keeping the conditioned space more resistant to outside temperatures, not immune.?
What kind of windows do you have? Windows are very energy inefficient, no matter what they say about them.?
Windows will never equal walls in insulation value....
?
Sorry for your heat, was 101 here in Atlanta for 1 day
?
Stay safe!
?
?
On 7/6/2024 9:53 PM, davesmith1800 wrote:
When into my hobby shop and was 114° it insulated R13 walls ceiling R30.?
My wife and doctor does want working hot weather so put some of my projects on hold till getting cooler.?
At less paint dries fast.?
PS see you are very close to where I live
Dave?
On Sat, Jul 6, 2024 at 06:35 PM, gcvisalia@... wrote:
?
Yea, just a few degree cooler here in visalia. But still hot enough to melt things. Sunday will be 113.
?
george
?
On Saturday, July 6, 2024 at 03:35:16 PM PDT, davesmith1800 <davesmith1@...> wrote: ?
?
I was wondering why fleeling Hot?
Check tv . No one is letting run my mini lathe.
?
?
?
?
?
Attachments:
|
Here a photo from past.? If look under motor you see a opening . The set motor to bring in cool air. The only problem is low speed work.? Dave 
On Sat, Jul 6, 2024 at 11:30 PM, Miket_NYC wrote:
Speaking?of heat, some of you might be interested in a modification I made to my minilathe about 15?years ago. To keep the electronics from overheating, I drilled holes in the cover with screening on the inside so no swarf would get in. I have no idea whether this helped or not,? but it can't hurt.
?
Mike Taglieri?
On Sun, Jul 7, 2024, 1:07 AM Ralph Lehotsky via <ralphlehotsky= [email protected]> wrote:
And once the inside gets hot, it takes longer to cool it down, as the insulation keeps the heat in
?
ralphie
Dave,?
Insulation DOES NOT STOP heat permeation/infiltration, It simply slows it down, (13 times or 30 times no insulation at all),
so that a smaller cooling source, or heating source in winter, can more easily maintain a temperature inside the insulated container,
keeping the conditioned space more resistant to outside temperatures, not immune.?
What kind of windows do you have? Windows are very energy inefficient, no matter what they say about them.?
Windows will never equal walls in insulation value....
?
Sorry for your heat, was 101 here in Atlanta for 1 day
?
Stay safe!
?
?
On 7/6/2024 9:53 PM, davesmith1800 wrote:
When into my hobby shop and was 114° it insulated R13 walls ceiling R30.?
My wife and doctor does want working hot weather so put some of my projects on hold till getting cooler.?
At less paint dries fast.?
PS see you are very close to where I live
Dave?
On Sat, Jul 6, 2024 at 06:35 PM, gcvisalia@... wrote:
?
Yea, just a few degree cooler here in visalia. But still hot enough to melt things. Sunday will be 113.
?
george
?
On Saturday, July 6, 2024 at 03:35:16 PM PDT, davesmith1800 <davesmith1@...> wrote: ?
?
I was wondering why fleeling Hot? Check tv . No one is letting run my mini lathe. ![]()
?
?
?
|
I should hope not.? Not only would we burn ourselves using our lathes in that kind of heat, but our perspiration dripping on the machines would create a lot of rust.? ?Besides, if temperatures on earth were to increase to 80°C (176°F) , the only organism that might still able to reproduce at that temperature would be Staphylothermus marinus (which is the archaebacterium that lives off of volcanic gasses emitted from deep oceanic trenches).? All other living things would die off and wouldn’t be able to return. ? Jerry F.? ????? ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Chris Albertson
Sent: Sunday, July 07, 2024 5:32 PM
To: [email protected]
Subject: Re: [7x12MiniLathe] OT Hot Hot Hot? Yes, You are correct. ?The best you can expect with forced air cooling is to cool the part to ambient temperature. ? You can of course, never get there, no matter how big the fan. ? ? But again the parts are spec’d for 80C and even in another 50 years it will likely never get to 80C on Earth. ? ?
On Jul 7, 2024, at 4:27?PM, davesmith1800 via groups.io <davesmith1@...> wrote: ? 40°C is 104°F?
Try living where the temperature is in normal will 110°F 43.3°C?
Cooling becomes a big problem?
Dave?
On Sun, Jul 7, 2024 at 11:03 AM, Chris Albertson wrote: ? ? On Jul 6, 2024, at 11:30?PM, Miket_NYC via groups.io <mctaglieri@...> wrote: Speaking?of heat, some of you might be interested in a modification I made to my minilathe about 15?years ago. To keep the electronics from overheating, I drilled holes in the cover with screening on the inside so no swarf would get in. I have no idea whether this helped or not,? but it can't hurt.
Most of the parts are rated for at least 80C. Parts will work OK even if they are so hot they ould burn your skin. ? ? That said service life can depend on temperature. With air cooling, the cooling efferct depends on the square root of the air velocity. ?So you get the most gain with the fist small amount of airflow and then after that diminishing return The first increment is simple convection. ?Hot air raises and creates air motion. ?Better if you put hole in ther top and in the bottom ? The lower holes are just as important as the holes near the top. ?The idea is to allow the air to flow. ? ? ? Then if there is not enough movement by convection, add a fan. ? ? Ideally you keep the electronics at about 40C or less. ? On Sun, Jul 7, 2024, 1:07 AM Ralph Lehotsky via <ralphlehotsky=[email protected]> wrote: And once the inside gets hot, it takes longer to cool it down, as the insulation keeps the heat in ? Insulation DOES NOT STOP heat permeation/infiltration, It simply slows it down, (13 times or 30 times no insulation at all), so that a smaller cooling source, or heating source in winter, can more easily maintain a temperature inside the insulated container, keeping the conditioned space more resistant to outside temperatures, not immune.? What kind of windows do you have? Windows are very energy inefficient, no matter what they say about them.? Windows will never equal walls in insulation value.... Sorry for your heat, was 101 here in Atlanta for 1 day On 7/6/2024 9:53 PM, davesmith1800 wrote: When into my hobby shop and was 114° it insulated R13 walls ceiling R30.?
My wife and doctor does want working hot weather so put some of my projects on hold till getting cooler.?
At less paint dries fast.?
PS see you are very close to where I live
Dave?
On Sat, Jul 6, 2024 at 06:35 PM, gcvisalia@... wrote: Yea, just a few degree cooler here in visalia. But still hot enough to melt things. Sunday will be 113. On Saturday, July 6, 2024 at 03:35:16 PM PDT, davesmith1800 <davesmith1@...> wrote: I was wondering why fleeling Hot?
Check tv . No one is letting run my mini lathe.
Error! Filename not specified.
Attachments: ?
|
The mini lathe will be still around .
Before the disastrous the earth temperature was 140°F and the oxygen was above 30%.
We had real big bugs
We just need to have better AC then for the hobby shop to run the mini lathe
Dave?
toggle quoted message
Show quoted text
On Sun, Jul 7, 2024 at 07:58 PM, Gerald Feldman wrote:
I should hope not.? Not only would we burn ourselves using our lathes in that kind of heat, but our perspiration dripping on the machines would create a lot of rust.? ?Besides, if temperatures on earth were to increase to 80°C (176°F) , the only organism that might still able to reproduce at that temperature would be Staphylothermus marinus (which is the archaebacterium that lives off of volcanic gasses emitted from deep oceanic trenches).? All other living things would die off and wouldn’t be able to return.
?
Jerry F.? ?????
?
?
Yes, You are correct. ?The best you can expect with forced air cooling is to cool the part to ambient temperature. ? You can of course, never get there, no matter how big the fan. ? ?
But again the parts are spec’d for 80C and even in another 50 years it will likely never get to 80C on Earth. ?
?
On Jul 7, 2024, at 4:27?PM, davesmith1800 via groups.io <davesmith1@...> wrote:
?
40°C is 104°F?
Try living where the temperature is in normal will 110°F 43.3°C?
Cooling becomes a big problem?
Dave?
On Sun, Jul 7, 2024 at 11:03 AM, Chris Albertson wrote:
?
?
On Jul 6, 2024, at 11:30?PM, Miket_NYC via groups.io <mctaglieri@...> wrote:
Speaking?of heat, some of you might be interested in a modification I made to my minilathe about 15?years ago. To keep the electronics from overheating, I drilled holes in the cover with screening on the inside so no swarf would get in. I have no idea whether this helped or not,? but it can't hurt.
Most of the parts are rated for at least 80C. Parts will work OK even if they are so hot they ould burn your skin. ? ? That said service life can depend on temperature.
With air cooling, the cooling efferct depends on the square root of the air velocity. ?So you get the most gain with the fist small amount of airflow and then after that diminishing return
The first increment is simple convection. ?Hot air raises and creates air motion. ?Better if you put hole in ther top and in the bottom ? The lower holes are just as important as the holes near the top. ?The idea is to allow the air to flow. ? ? ? Then if there is not enough movement by convection, add a fan. ? ? Ideally you keep the electronics at about 40C or less.
?
On Sun, Jul 7, 2024, 1:07 AM Ralph Lehotsky via <ralphlehotsky=[email protected]> wrote:
And once the inside gets hot, it takes longer to cool it down, as the insulation keeps the heat in
?
Insulation DOES NOT STOP heat permeation/infiltration, It simply slows it down, (13 times or 30 times no insulation at all),
so that a smaller cooling source, or heating source in winter, can more easily maintain a temperature inside the insulated container,
keeping the conditioned space more resistant to outside temperatures, not immune.?
What kind of windows do you have? Windows are very energy inefficient, no matter what they say about them.?
Windows will never equal walls in insulation value....
Sorry for your heat, was 101 here in Atlanta for 1 day
On 7/6/2024 9:53 PM, davesmith1800 wrote:
When into my hobby shop and was 114° it insulated R13 walls ceiling R30.?
My wife and doctor does want working hot weather so put some of my projects on hold till getting cooler.?
At less paint dries fast.?
PS see you are very close to where I live
Dave?
On Sat, Jul 6, 2024 at 06:35 PM, gcvisalia@... wrote:
Yea, just a few degree cooler here in visalia. But still hot enough to melt things. Sunday will be 113.
On Saturday, July 6, 2024 at 03:35:16 PM PDT, davesmith1800 <davesmith1@...> wrote:
I was wondering why fleeling Hot?
Check tv . No one is letting run my mini lathe.
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Most motor are rated on any machine tool is rated for the rize in temperature.?
So if shop at 80° and motor rated 120° rize.The motor temperature is 200°
Now with today's temperature where I live is 114° plus 120° so now the motor is 234°.
The late great in winter at 70° plus 100° the motor is running at 170°.?
Now in summer the motor or electronic could give you a problem?
Most over look the problems Global warming is doing on motors and electronics in mini lathes and Mills.?
Dave?
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You can’t add temparures like that. ?It is not linear.
Without going into the science, maybe an easy why to explain it is that the rate that heat moves depends on the difference in temperature. So as a motor changes temparture the cooling rate also changes.
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On Jul 9, 2024, at 7:34?AM, davesmith1800 via groups.io <davesmith1@...> wrote:
Most motor are rated on any machine tool is rated for the rize in temperature.?
So if shop at 80° and motor rated 120° rize.The motor temperature is 200°
Now with today's temperature where I live is 114° plus 120° so now the motor is 234°.
The late great in winter at 70° plus 100° the motor is running at 170°.?
Now in summer the motor or electronic could give you a problem?
Most over look the problems Global warming is doing on motors and electronics in mini lathes and Mills.?
Dave?
?
|
It is what motor companies say. There a lot goes to figuring heat transfer.?
It is only a simple way of figuring out the limits.?
Dave?
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On Tue, Jul 9, 2024 at 09:16 AM, Chris Albertson wrote:
You can’t add temparures like that. ?It is not linear.
?
Without going into the science, maybe an easy why to explain it is that the rate that heat moves depends on the difference in temperature. So as a motor changes temparture the cooling rate also changes.
?
On Jul 9, 2024, at 7:34?AM, davesmith1800 via groups.io <davesmith1@...> wrote:
Most motor are rated on any machine tool is rated for the rize in temperature.?
So if shop at 80° and motor rated 120° rize.The motor temperature is 200°
Now with today's temperature where I live is 114° plus 120° so now the motor is 234°.
The late great in winter at 70° plus 100° the motor is running at 170°.?
Now in summer the motor or electronic could give you a problem?
Most over look the problems Global warming is doing on motors and electronics in mini lathes and Mills.?
Dave?
?
|
Nope, that is not how it works.
Per NEMA, the maximum ambient temp is 40C (104F). There is a required reduction for altitude? (up to 1000m 40C, up to 2000m 30C, up to 3000m 20C). The IEC ratings are similar - also with a 40C ambient maximum.
Based on the motor insulation class (NEMA A,B,F,H), there are temperature limits - referred to as temperature rise based on a maximum 40C ambient (A - 105C, B - 130C, F - 155C, H - 180C)..?
THIS IS REALLY IMPORTANT - the maximum value listed by class has a starting point of 40C maximum. For example a Class A insulation class would allow a maximum temperature of 105C so a change of 105-40 = 65C . If ambient is higher that 40C, you still only go to 105C max, you just get less delta T. So - if ambient is 50C, you still only get to to a maximum of 105C. If ambient is 70C, you only get to 105C. AND if you are higher altitude, you have to degrade the maximum temperature because the starting point (maximum ambient) is lower. So, at 2000m, maximum ambient is 30C and you get 65C delta T so your maximum temperature is 95C.
You can read about it here:
On Tue, Jul 9, 2024 at 10:51?AM davesmith1800 via <davesmith1= [email protected]> wrote: It is what motor companies say. There a lot goes to figuring heat transfer.?
It is only a simple way of figuring out the limits.?
Dave?
On Tue, Jul 9, 2024 at 09:16 AM, Chris Albertson wrote:
You can’t add temparures like that.? It is not linear.
?
Without going into the science, maybe an easy why to explain it is that the rate that heat moves depends on the difference in temperature. So as a motor changes temparture the cooling rate also changes.
?
Most motor are rated on any machine tool is rated for the rize in temperature.?
So if shop at 80° and motor rated 120° rize.The motor temperature is 200°
Now with today's temperature where I live is 114° plus 120° so now the motor is 234°.
The late great in winter at 70° plus 100° the motor is running at 170°.?
Now in summer the motor or electronic could give you a problem?
Most over look the problems Global warming is doing on motors and electronics in mini lathes and Mills.?
Dave?
?
--
Buffalo John
|
If remember NEMA ia at sea leave I think at 40% humidity.?
So high you go less cooling.?
I have different outside temperature most are 105°F max for maximum horse power. If go hot hotter you need reduce the horse power.??
Some motor are designed for higher temperature and altitude.??
This best use formula for air compressor and pump. Machine tools are variable horse power needs.?
There are places in America that is over 1,000 feet? witch can you trouble with over heating motors
Dave?
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On Wed, Jul 10, 2024 at 03:06 PM, BuffaloJohn wrote:
Nope, that is not how it works.
?
Per NEMA, the maximum ambient temp is 40C (104F). There is a required reduction for altitude? (up to 1000m 40C, up to 2000m 30C, up to 3000m 20C). The IEC ratings are similar - also with a 40C ambient maximum.
?
Based on the motor insulation class (NEMA A,B,F,H), there are temperature limits - referred to as temperature rise based on a maximum 40C ambient (A - 105C, B - 130C, F - 155C, H - 180C)..?
?
THIS IS REALLY IMPORTANT - the maximum value listed by class has a starting point of 40C maximum. For example a Class A insulation class would allow a maximum temperature of 105C so a change of 105-40 = 65C . If ambient is higher that 40C, you still only go to 105C max, you just get less delta T. So - if ambient is 50C, you still only get to to a maximum of 105C. If ambient is 70C, you only get to 105C. AND if you are higher altitude, you have to degrade the maximum temperature because the starting point (maximum ambient) is lower. So, at 2000m, maximum ambient is 30C and you get 65C delta T so your maximum temperature is 95C.
?
You can read about it here:
On Tue, Jul 9, 2024 at 10:51?AM davesmith1800 via <davesmith1= [email protected]> wrote: It is what motor companies say. There a lot goes to figuring heat transfer.?
It is only a simple way of figuring out the limits.?
Dave?
On Tue, Jul 9, 2024 at 09:16 AM, Chris Albertson wrote:
You can’t add temparures like that.? It is not linear.
?
Without going into the science, maybe an easy why to explain it is that the rate that heat moves depends on the difference in temperature. So as a motor changes temparture the cooling rate also changes.
?
Most motor are rated on any machine tool is rated for the rize in temperature.?
So if shop at 80° and motor rated 120° rize.The motor temperature is 200°
Now with today's temperature where I live is 114° plus 120° so now the motor is 234°.
The late great in winter at 70° plus 100° the motor is running at 170°.?
Now in summer the motor or electronic could give you a problem?
Most over look the problems Global warming is doing on motors and electronics in mini lathes and Mills.?
Dave?
?
?
?
--
Buffalo John
W
|
See responses below
On Wed, Jul 10, 2024 at 4:54?PM davesmith1800 via <davesmith1= [email protected]> wrote: If remember NEMA ia at sea leave I think at 40% humidity.
No, there is NO humidity, it is 40C which is 104F.
Also, the first elevation is from 0m to 999m
? ?
So high you go less cooling.?
No, as you go higher, air is thinner and therefore you need more cooling ?
I have different outside temperature most are 105°F max for maximum horse power. If go hot hotter you need reduce the horse power.
NEMA and IEC motors are rated in degrees C, not degrees F. As I wrote, Class A insulation is rated to 105C. As for HP, that may be a motor curve, but it is irrelevant to the maximum temperature rating of the motor. There is a Service Factor rating that is part of the spec, but that was not added to this discussion.
Some motor are designed for higher temperature and altitude.??
Yes, that is correct. ?
This best use formula for air compressor and pump. Machine tools are variable horse power needs.?
Almost all tools are variable power needs, the more the tool works, the more HP is needed.
There are places in America that is over 1,000 feet? witch can you trouble with over heating motors
Motors with a Class A rating will be good to 1000m (~3300ft). If you are not pushing the overall rating of the motor, even up to 3000m (~9900ft), the motor doesn't need to overheat.
Dave?
On Wed, Jul 10, 2024 at 03:06 PM, BuffaloJohn wrote:
Nope, that is not how it works.
?
Per NEMA, the maximum ambient temp is 40C (104F). There is a required reduction for altitude? (up to 1000m 40C, up to 2000m 30C, up to 3000m 20C). The IEC ratings are similar - also with a 40C ambient maximum.
?
Based on the motor insulation class (NEMA A,B,F,H), there are temperature limits - referred to as temperature rise based on a maximum 40C ambient (A - 105C, B - 130C, F - 155C, H - 180C)..?
?
THIS IS REALLY IMPORTANT - the maximum value listed by class has a starting point of 40C maximum. For example a Class A insulation class would allow a maximum temperature of 105C so a change of 105-40 = 65C . If ambient is higher that 40C, you still only go to 105C max, you just get less delta T. So - if ambient is 50C, you still only get to to a maximum of 105C. If ambient is 70C, you only get to 105C. AND if you are higher altitude, you have to degrade the maximum temperature because the starting point (maximum ambient) is lower. So, at 2000m, maximum ambient is 30C and you get 65C delta T so your maximum temperature is 95C.
?
You can read about it here:
On Tue, Jul 9, 2024 at 10:51?AM davesmith1800 via <davesmith1= [email protected]> wrote: It is what motor companies say. There a lot goes to figuring heat transfer.?
It is only a simple way of figuring out the limits.?
Dave?
On Tue, Jul 9, 2024 at 09:16 AM, Chris Albertson wrote:
You can’t add temparures like that.? It is not linear.
?
Without going into the science, maybe an easy why to explain it is that the rate that heat moves depends on the difference in temperature. So as a motor changes temparture the cooling rate also changes.
?
Most motor are rated on any machine tool is rated for the rize in temperature.?
So if shop at 80° and motor rated 120° rize.The motor temperature is 200°
Now with today's temperature where I live is 114° plus 120° so now the motor is 234°.
The late great in winter at 70° plus 100° the motor is running at 170°.?
Now in summer the motor or electronic could give you a problem?
Most over look the problems Global warming is doing on motors and electronics in mini lathes and Mills.?
Dave?
?
?
?
--
Buffalo John
W
-- Buffalo John
|
Yeah, we went around and around on this a while back.? The concept of “it’s the melting point of the enamel on the motor coils” that sets the temperature limit seems to have escaped Dave. ? Also note that as we tend not to run the motor at full RPM cooling is reduced as well (internal fan spins slower). ? Tony ? ?
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From: [email protected] <[email protected]> On Behalf Of BuffaloJohn via groups.io
Sent: Thursday, 11 July 2024 10:45 AM
To: [email protected]
Subject: Re: [7x12MiniLathe] OT Hot Hot Hot? ? On Wed, Jul 10, 2024 at 4:54?PM davesmith1800 via <davesmith1=[email protected]> wrote: If remember NEMA ia at sea leave I think at 40% humidity.
No, there is NO humidity, it is 40C which is 104F. Also, the first elevation is from 0m to 999m ?
So high you go less cooling.?
No, as you go higher, air is thinner and therefore you need more cooling I have different outside temperature most are 105°F max for maximum horse power. If go hot hotter you need reduce the horse power.
NEMA and IEC motors are rated in degrees C, not degrees F. As I wrote, Class A insulation is rated to 105C. As for HP, that may be a motor curve, but it is irrelevant to the maximum temperature rating of the motor. There is a Service Factor rating that is part of the spec, but that was not added to this discussion. Some motor are designed for higher temperature and altitude.??
This best use formula for air compressor and pump. Machine tools are variable horse power needs.?
Almost all tools are variable power needs, the more the tool works, the more HP is needed. There are places in America that is over 1,000 feet? witch can you trouble with over heating motors
Motors with a Class A rating will be good to 1000m (~3300ft). If you are not pushing the overall rating of the motor, even up to 3000m (~9900ft), the motor doesn't need to overheat.
Dave?
On Wed, Jul 10, 2024 at 03:06 PM, BuffaloJohn wrote:
Nope, that is not how it works. Per NEMA, the maximum ambient temp is 40C (104F). There is a required reduction for altitude? (up to 1000m 40C, up to 2000m 30C, up to 3000m 20C). The IEC ratings are similar - also with a 40C ambient maximum. Based on the motor insulation class (NEMA A,B,F,H), there are temperature limits - referred to as temperature rise based on a maximum 40C ambient (A - 105C, B - 130C, F - 155C, H - 180C)..? THIS IS REALLY IMPORTANT - the maximum value listed by class has a starting point of 40C maximum. For example a Class A insulation class would allow a maximum temperature of 105C so a change of 105-40 = 65C . If ambient is higher that 40C, you still only go to 105C max, you just get less delta T. So - if ambient is 50C, you still only get to to a maximum of 105C. If ambient is 70C, you only get to 105C. AND if you are higher altitude, you have to degrade the maximum temperature because the starting point (maximum ambient) is lower. So, at 2000m, maximum ambient is 30C and you get 65C delta T so your maximum temperature is 95C. You can read about it here: ? On Tue, Jul 9, 2024 at 10:51?AM davesmith1800 via <davesmith1=[email protected]> wrote: It is what motor companies say. There a lot goes to figuring heat transfer.?
It is only a simple way of figuring out the limits.?
Dave?
On Tue, Jul 9, 2024 at 09:16 AM, Chris Albertson wrote: You can’t add temparures like that.? It is not linear. Without going into the science, maybe an easy why to explain it is that the rate that heat moves depends on the difference in temperature. So as a motor changes temparture the cooling rate also changes. Most motor are rated on any machine tool is rated for the rize in temperature.?
So if shop at 80° and motor rated 120° rize.The motor temperature is 200°
Now with today's temperature where I live is 114° plus 120° so now the motor is 234°.
The late great in winter at 70° plus 100° the motor is running at 170°.?
Now in summer the motor or electronic could give you a problem?
Most over look the problems Global warming is doing on motors and electronics in mini lathes and Mills.?
Dave?
?
? ?
--
Buffalo John
W
--
Buffalo John
|
Ralph Lehotsky
davesmith1800
BuffaloJohn