Re: Air Compressor Big and Small- David Kumm Style
Brian, I couldn’t agree more. ?When my dads' 40 gallon kicks on it seems like I have never heard the noise before. ?It startles me every time!?
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On Jan 26, 2021, at 12:24 PM, Brian Lamb < blamb11@...> wrote:
If that’s all the sand blasting you intend to do, then definitely look at no more than a 5hp unit. As for the smaller unit, look for quiet…. period. The most irritating noise in the shop is the compressor... and they start when you least expect.On Jan 26, 2021, at 9:46 AM, Anthony Quesada < tonymiga2@...> wrote:
Great comments and questions!
If previous experience is any indication, the blast cabinet will be used sporadically and extremely lightly by commercial standards, as I am a hobbyist that loves both metal and wood. ?I can see the cabinet getting used 15 minutes here and 20 minutes there with weeks in between without use. ? I am very, very much a beginner machinist/metal worker, but hope to develop the skills over time. ?
Love Brian's idea of getting a more "modest" 5HP compressor and being patient if the blast cabinet can't keep up. ?
Regarding the small compressor down line of the larger one.... I never would have thought of this, but thankfully it was mentioned here. ?Since most of my use can be served by a little pancake type compressor, I would view this as taking the nimble and quick scooter out to get a carton of milk from the corner store vs a large pickup truck with trailer behind. ? ?Both get the job done, but one is quieter, more efficient and quicker for the specific task.
Anthony?
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Re: Air Compressor Big and Small- David Kumm Style
If that’s all the sand blasting you intend to do, then definitely look at no more than a 5hp unit. As for the smaller unit, look for quiet…. period. The most irritating noise in the shop is the compressor... and they start when you least expect.
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On Jan 26, 2021, at 9:46 AM, Anthony Quesada < tonymiga2@...> wrote:
Great comments and questions!
If previous experience is any indication, the blast cabinet will be used sporadically and extremely lightly by commercial standards, as I am a hobbyist that loves both metal and wood. ?I can see the cabinet getting used 15 minutes here and 20 minutes there with weeks in between without use. ? I am very, very much a beginner machinist/metal worker, but hope to develop the skills over time. ?
Love Brian's idea of getting a more "modest" 5HP compressor and being patient if the blast cabinet can't keep up. ?
Regarding the small compressor down line of the larger one.... I never would have thought of this, but thankfully it was mentioned here. ?Since most of my use can be served by a little pancake type compressor, I would view this as taking the nimble and quick scooter out to get a carton of milk from the corner store vs a large pickup truck with trailer behind. ? ?Both get the job done, but one is quieter, more efficient and quicker for the specific task.
Anthony?
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Re: Air Compressor Big and Small- David Kumm Style
Joe,
Fantastic info. This is a very understandable explanation of CFM. Thank you for taking the time to explain!
Anthony
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Re: Air Compressor Big and Small- David Kumm Style
Seems that way, I run the small compressor at a slightly higher pressure than the “regulated” line pressure coming out of the big compressor. This way it seems the large compressor only feeds air to the lines when the smaller one can’t keep up.?
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Brian, ? Does the regulator serve as a one way valve and keep the smaller compressor from running for an extended period of time to fill up the tank on the large compressor? Thanks, Dave On Tue, Jan 26, 2021 at 9:57 AM Brian Lamb < bklamb1@...> wrote:
Right now I just plug in my small compressor to the airlines in the shop, past the tank and regulator for the big unit. I'm in the process of cleaning up the shop and organizing, so who knows what I will eventually do.
=============== Brian Lamb blamb11@... Phoenix, AZ ===============
Brian,
I forgot if you posted details before but reading the thread i have similar thoughts as Johnathon. Primary question is do you or anyone reading fill up the large tank with little compressor or just use one at a time?
I can see the benefit of having both plumbed in and concerns with surge current of a large compressor.
Imran
On Jan 26, 2021, at 10:44 AM, Brian Lamb < blamb11@...> wrote:
?Advantages are mostly noise and to a slight advantage in electricity costs. I use a Sil-Air 150-3 compressor, which is almost silent, then if my air requirement is more than it can supply, the 5hp unit kicks in. The little unit runs on minimal
amps and has no huge start up surge of amps. Same thing can’t be said for every time the 5hp IR unit kicks in… like 30 amp inrush. So depending upon how you pay for your electricity, you can save quite a bit. A word of warning, compressed air is very expensive...
I read all through this and still don't understand what the advantage is to adding a small compressor. A pancake wont add significant capacity.? Cycling a 5 or 10-hp motor at intervals isn't a big deal.? Besides all that, the 2 compressors would
turn on and off at different pressures so one would always shut off last (unless they shared the same switch).? I assume the small unit would be set higher but why?? Would there be a check valve on the large compressor reservoir to save the small from charging
it?? Or am I wrong to assume 2 reservoirs?? What am I missing?
--
Brian Lamb
blamb11@...?
-- Dave & Marie Davies
318-219-7868
|
Re: Air Compressor Big and Small- David Kumm Style
Anthony, there are compressor brands and even levels within the brands.? As an engineer I have a problem in that I always need to learn a ton about
a topic before I make the plunge.? On air compressors;
-
The tank size is not super critical.? A 60 gallon tank is about 8 cubic feet of air. ?An 80 gallon tank is 10.7 cubic feet.? If the tank is pressurized to say 175 psi and your regulator
is at 100 psi, you will get a bit more air more air out of a tank but not a game changing amount.?
-
I have a Quincy that’s 40 years old with a model 325 pump.? This is the QR series today.? The pump has an oil pump for pressure lubrication.? I bought the compressor used from a dental
office.? I was planning to rebuild it and went to the local Quincy dealer to inquire about parts.? They said to test before I did anything.? I did buy new pressure relief valves for safety.? The test was to drain the tank to empty and then start the compressor.
?Time how long it takes to fill the tank and note the pressure. ??Then do the math to see how many CFM the compressor makes in one minute.? Say you want to know how many cfm the compressor will make at 100 psi.? Set the pressure switch to 100 psi, fill the
tank until it shuts off.? Say that was 30 seconds.? Then do the math and you would get in my case a 60 gallon tank is 8 cu ft.? If it fills in 30 seconds and shuts off at 100 psi then the compressor makes 16 cu ft per minute at 100 psi.? If you increase the
PSI then it will take longer to fill and maybe like 12 cu ft per min at 175 psi.? In my case the pump still makes rated output at 100 and 175 psi so no rebuild needed.? This is an easy test if looking at a used one.
?
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From: [email protected] < [email protected]>
On Behalf Of Anthony Quesada
Sent: Tuesday, January 26, 2021 9:46 AM
To: [email protected]
Subject: Re: [FOG] Air Compressor Big and Small- David Kumm Style
?
Great comments and questions!
If previous experience is any indication, the blast cabinet will be used sporadically and extremely lightly by commercial standards, as I am a hobbyist that loves both metal and wood. ?I can see the cabinet getting used 15 minutes here and 20 minutes there
with weeks in between without use. ? I am very, very much a beginner machinist/metal worker, but hope to develop the skills over time. ?
Love Brian's idea of getting a more "modest" 5HP compressor and being patient if the blast cabinet can't keep up. ?
Regarding the small compressor down line of the larger one.... I never would have thought of this, but thankfully it was mentioned here. ?Since most of my use can be served by a little pancake type compressor, I would view this as taking the nimble and quick
scooter out to get a carton of milk from the corner store vs a large pickup truck with trailer behind. ? ?Both get the job done, but one is quieter, more efficient and quicker for the specific task.
Anthony?
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Bill,
I did not know auto position had something to do with auto clean as well. Do I understand correctly that in this position you can autostart/stop with a relay?
Imran
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On Jan 26, 2021, at 11:57 AM, Bill James via groups.io <xxrb2010@...> wrote: ?On Mon, Jan 25, 2021 at 10:39 PM, Mike Bemis wrote:
(Does this jumping pins 7 & 8 cause issues with the motors getting up to speed?)
The RL models that offer this automated position are build to have the RL start and stop automatically for the auto clean feature as far as I understand. So, you do not have any issue jumping pins 7 & 8.?
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On Mon, Jan 25, 2021 at 10:39 PM, Mike Bemis wrote:
(Does this jumping pins 7 & 8 cause issues with the motors getting up to speed?)
The RL models that offer this automated position are build to have the RL start and stop automatically for the auto clean feature as far as I understand. So, you do not have any issue jumping pins 7 & 8.?
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Re: Air Compressor Big and Small- David Kumm Style
Great comments and questions!
If previous experience is any indication, the blast cabinet will be used sporadically and extremely lightly by commercial standards, as I am a hobbyist that loves both metal and wood. ?I can see the cabinet getting used 15 minutes here and 20 minutes there with weeks in between without use. ? I am very, very much a beginner machinist/metal worker, but hope to develop the skills over time. ?
Love Brian's idea of getting a more "modest" 5HP compressor and being patient if the blast cabinet can't keep up. ?
Regarding the small compressor down line of the larger one.... I never would have thought of this, but thankfully it was mentioned here. ?Since most of my use can be served by a little pancake type compressor, I would view this as taking the nimble and quick scooter out to get a carton of milk from the corner store vs a large pickup truck with trailer behind. ? ?Both get the job done, but one is quieter, more efficient and quicker for the specific task.
Anthony?
|
Re: Air Compressor Big and Small- David Kumm Style
David,
When I looked into that I found both kinds exist. I am not sure if they are designed to be one way or it is just an inherent feature of the regulator.
Imran
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On Jan 26, 2021, at 11:07 AM, David Davies <myfinishingtouch@...> wrote: ? Brian, ? Does the regulator serve as a one way valve and keep the smaller compressor from running for an extended period of time to fill up the tank on the large compressor? Thanks, Dave On Tue, Jan 26, 2021 at 9:57 AM Brian Lamb < bklamb1@...> wrote:
Right now I just plug in my small compressor to the airlines in the shop, past the tank and regulator for the big unit. I'm in the process of cleaning up the shop and organizing, so who knows what I will eventually do.
=============== Brian Lamb blamb11@... Phoenix, AZ ===============
Brian,
I forgot if you posted details before but reading the thread i have similar thoughts as Johnathon. Primary question is do you or anyone reading fill up the large tank with little compressor or just use one at a time?
I can see the benefit of having both plumbed in and concerns with surge current of a large compressor.
Imran
On Jan 26, 2021, at 10:44 AM, Brian Lamb < blamb11@...> wrote:
?Advantages are mostly noise and to a slight advantage in electricity costs. I use a Sil-Air 150-3 compressor, which is almost silent, then if my air requirement is more than it can supply, the 5hp unit kicks in. The little unit runs on minimal
amps and has no huge start up surge of amps. Same thing can’t be said for every time the 5hp IR unit kicks in… like 30 amp inrush. So depending upon how you pay for your electricity, you can save quite a bit. A word of warning, compressed air is very expensive...
I read all through this and still don't understand what the advantage is to adding a small compressor. A pancake wont add significant capacity.? Cycling a 5 or 10-hp motor at intervals isn't a big deal.? Besides all that, the 2 compressors would
turn on and off at different pressures so one would always shut off last (unless they shared the same switch).? I assume the small unit would be set higher but why?? Would there be a check valve on the large compressor reservoir to save the small from charging
it?? Or am I wrong to assume 2 reservoirs?? What am I missing?
--
Brian Lamb
blamb11@...?
?
-- Dave & Marie Davies
318-219-7868
|
Re: Air Compressor Big and Small- David Kumm Style
Brian, ? Does the regulator serve as a one way valve and keep the smaller compressor from running for an extended period of time to fill up the tank on the large compressor? Thanks, Dave
On Tue, Jan 26, 2021 at 9:57 AM Brian Lamb < bklamb1@...> wrote:
Right now I just plug in my small compressor to the airlines in the shop, past the tank and regulator for the big unit. I'm in the process of cleaning up the shop and organizing, so who knows what I will eventually do.
=============== Brian Lamb blamb11@... Phoenix, AZ ===============
Brian,
I forgot if you posted details before but reading the thread i have similar thoughts as Johnathon. Primary question is do you or anyone reading fill up the large tank with little compressor or just use one at a time?
I can see the benefit of having both plumbed in and concerns with surge current of a large compressor.
Imran
On Jan 26, 2021, at 10:44 AM, Brian Lamb < blamb11@...> wrote:
?Advantages are mostly noise and to a slight advantage in electricity costs. I use a Sil-Air 150-3 compressor, which is almost silent, then if my air requirement is more than it can supply, the 5hp unit kicks in. The little unit runs on minimal
amps and has no huge start up surge of amps. Same thing can’t be said for every time the 5hp IR unit kicks in… like 30 amp inrush. So depending upon how you pay for your electricity, you can save quite a bit. A word of warning, compressed air is very expensive...
I read all through this and still don't understand what the advantage is to adding a small compressor. A pancake wont add significant capacity.? Cycling a 5 or 10-hp motor at intervals isn't a big deal.? Besides all that, the 2 compressors would
turn on and off at different pressures so one would always shut off last (unless they shared the same switch).? I assume the small unit would be set higher but why?? Would there be a check valve on the large compressor reservoir to save the small from charging
it?? Or am I wrong to assume 2 reservoirs?? What am I missing?
--
Brian Lamb
blamb11@...?
?
-- Dave & Marie Davies
318-219-7868
|
Re: Air Compressor Big and Small- David Kumm Style
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On Jan 26, 2021, at 10:57 AM, Brian Lamb <bklamb1@...> wrote: ?
Right now I just plug in my small compressor to the airlines in the shop, past the tank and regulator for the big unit. I'm in the process of cleaning up the shop and organizing, so who knows what I will eventually do.
=============== Brian Lamb blamb11@... Phoenix, AZ ===============
Brian,
I forgot if you posted details before but reading the thread i have similar thoughts as Johnathon. Primary question is do you or anyone reading fill up the large tank with little compressor or just use one at a time?
I can see the benefit of having both plumbed in and concerns with surge current of a large compressor.
Imran
On Jan 26, 2021, at 10:44 AM, Brian Lamb <blamb11@...> wrote:
?Advantages are mostly noise and to a slight advantage in electricity costs. I use a Sil-Air 150-3 compressor, which is almost silent, then if my air requirement is more than it can supply, the 5hp unit kicks in. The little unit runs on minimal
amps and has no huge start up surge of amps. Same thing can’t be said for every time the 5hp IR unit kicks in… like 30 amp inrush. So depending upon how you pay for your electricity, you can save quite a bit. A word of warning, compressed air is very expensive...
I read all through this and still don't understand what the advantage is to adding a small compressor. A pancake wont add significant capacity.? Cycling a 5 or 10-hp motor at intervals isn't a big deal.? Besides all that, the 2 compressors would
turn on and off at different pressures so one would always shut off last (unless they shared the same switch).? I assume the small unit would be set higher but why?? Would there be a check valve on the large compressor reservoir to save the small from charging
it?? Or am I wrong to assume 2 reservoirs?? What am I missing?
-- Brian Lamb blamb11@...? ?
|
Re: Air Compressor Big and Small- David Kumm Style
Right now I just plug in my small compressor to the airlines in the shop, past the tank and regulator for the big unit. I'm in the process of cleaning up the shop and organizing, so who knows what I will eventually do.
=============== Brian Lamb blamb11@... Phoenix, AZ ===============
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Brian,
I forgot if you posted details before but reading the thread i have similar thoughts as Johnathon. Primary question is do you or anyone reading fill up the large tank with little compressor or just use one at a time?
I can see the benefit of having both plumbed in and concerns with surge current of a large compressor.
Imran
On Jan 26, 2021, at 10:44 AM, Brian Lamb <blamb11@...> wrote:
?Advantages are mostly noise and to a slight advantage in electricity costs. I use a Sil-Air 150-3 compressor, which is almost silent, then if my air requirement is more than it can supply, the 5hp unit kicks in. The little unit runs on minimal
amps and has no huge start up surge of amps. Same thing can’t be said for every time the 5hp IR unit kicks in… like 30 amp inrush. So depending upon how you pay for your electricity, you can save quite a bit. A word of warning, compressed air is very expensive...
I read all through this and still don't understand what the advantage is to adding a small compressor. A pancake wont add significant capacity.? Cycling a 5 or 10-hp motor at intervals isn't a big deal.? Besides all that, the 2 compressors would
turn on and off at different pressures so one would always shut off last (unless they shared the same switch).? I assume the small unit would be set higher but why?? Would there be a check valve on the large compressor reservoir to save the small from charging
it?? Or am I wrong to assume 2 reservoirs?? What am I missing?
-- Brian Lamb blamb11@...? ?
|
Re: Air Compressor Big and Small- David Kumm Style
Brian,
I forgot if you posted details before but reading the thread i have similar thoughts as Johnathon. Primary question is do you or anyone reading fill up the large tank with little compressor or just use one at a time?
I can see the benefit of having both plumbed in and concerns with surge current of a large compressor.
Imran
toggle quoted message
Show quoted text
On Jan 26, 2021, at 10:44 AM, Brian Lamb <blamb11@...> wrote: ? Advantages are mostly noise and to a slight advantage in electricity costs. I use a Sil-Air 150-3 compressor, which is almost silent, then if my air requirement is more than it can supply, the 5hp unit kicks in. The little unit runs on minimal amps and has no huge start up surge of amps. Same thing can’t be said for every time the 5hp IR unit kicks in… like 30 amp inrush. So depending upon how you pay for your electricity, you can save quite a bit. A word of warning, compressed air is very expensive...
I read all through this and still don't understand what the advantage is to adding a small compressor. A pancake wont add significant capacity.? Cycling a 5 or 10-hp motor at intervals isn't a big deal.? Besides all that, the 2 compressors would turn on and off at different pressures so one would always shut off last (unless they shared the same switch).? I assume the small unit would be set higher but why?? Would there be a check valve on the large compressor reservoir to save the small from charging it?? Or am I wrong to assume 2 reservoirs?? What am I missing?
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Re: Would you buy a combo Shaper/Saw?
Stan,
The HS950 is not pushed back per say, they are shipping them together to save shipping cost from Sacramento to me.? I assume that it may wait for a bit...
PK
@pkwoodworking
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Re: X-Roll Festool quick clamp adapter T nuts
#diy
I created a hashtag too, #3D_Print, but the chances of folks remembering to add that to the subject are slim to none….
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On Jan 26, 2021, at 8:31 AM, Uncle T. via < utplo@...> wrote:
Hi Mike,? This is creatively elegant yet simple. I'm not in the position to purchase pneumatic clamps at this time, but I do have access to a 3D printer. I would love to give this a try on my K500S with X-Roll. Thanks for offering to send the print file, you can PM to me.? I like the idea of starting?#3D_Print (newb opinion) Matt
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Re: Air Compressor Big and Small- David Kumm Style
Advantages are mostly noise and to a slight advantage in electricity costs. I use a Sil-Air 150-3 compressor, which is almost silent, then if my air requirement is more than it can supply, the 5hp unit kicks in. The little unit runs on minimal amps and has no huge start up surge of amps. Same thing can’t be said for every time the 5hp IR unit kicks in… like 30 amp inrush. So depending upon how you pay for your electricity, you can save quite a bit. A word of warning, compressed air is very expensive...
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I read all through this and still don't understand what the advantage is to adding a small compressor. A pancake wont add significant capacity.? Cycling a 5 or 10-hp motor at intervals isn't a big deal.? Besides all that, the 2 compressors would turn on and off at different pressures so one would always shut off last (unless they shared the same switch).? I assume the small unit would be set higher but why?? Would there be a check valve on the large compressor reservoir to save the small from charging it?? Or am I wrong to assume 2 reservoirs?? What am I missing?
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Re: Air Compressor Big and Small- David Kumm Style
I have heard great things about those Eastwood compressors… maybe when my Ingersol unit finally bites the dust.
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I'm chiming in with great 2+ year daily commercial use of a risk we took on the Eastwood QST-30/60. It is capable of 12cfm@90psi at 100% duty cycle and quiet as an HVAC compressor running because?I'm pretty sure that's what it is being a scroll compressor. People don't even know it's cycling in the shop until it stops and the pressure relief valve hisses. It also sits in the main area of the shop instead of hiding it away in a soundproof enclosure. Just looking up the link it appears they have a bigger 40/80 version now, too. I'd stack these units in parallel to fulfill higher cfm requirements until I finally got big enough air demand to support a screw.
I'm almost done with a rebuild of a 10 hp 3 cylinder Curtis compressor (E71 pump).? ?I will give an update once it's in service,? but it is very well built.? Curtis might be a brand to consider as well as other makes.?
Marlowe McGraw?
On Tue, Jan 26, 2021, 8:19 AM Brian Lamb < blamb11@...> wrote: Unless you plan on sand blasting with great regularity, do not size your compressor for the max requirement of the sand blaster. It’s been my experience that your blasting will be probably less than 10% of your usage, so stick with the capacity of a 5hp two stage unit and pause once in a while while you are blasting. Other wise you will need 20hp worth of compressor and spend 3x’s as much as you need for “normal” usage.
On Jan 25, 2021, at 7:16 PM, David Kumm < davekumm@...> wrote:
There isn't much to rebuilding the QR series but like everything else, it can be a crap shoot if the piston or bearings are an issue.? the valves are a no brainer to clean up.? the QT is the low end pump and you don't rehab those.? I think the 350 or 370 10
hp pumps are more appropriate for a pressurized blaster but do your homework.? Sometimes you can find a duplex compressor on CL or FB.? Two 325 with one tank.? Use one or both when necessary.? Dave
Dave,
Thanks for the recommendation.? thanks to your previous comments I have my eyes out for one of these 325’s.? I am still building skills, but think I would enjoy the challenge of a rebuild if I can source one.?
I don’t own a blast cabinet yet- waiting for the shop to be built before Ill have the space.? But I am leaning toward a PSBC990 Pressurized pot style cabinet.? Spec sheet claims? 25 CFM @80 PSI with 5MM nozzle, but it also appears that from several users that
the pressurized pot cuts down on that requirement.? Again, I have used blasters, but this will be my first personal setup so I am ridding pretty blind here.?
Anthony
-- Brett Wissel Saint Louis Restoration 1831 S Kingshighway Blvd (at Shaw Blvd) St Louis, MO 63110 314.772.2167 brett@...
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Re: Air Compressor Big and Small- David Kumm Style
In my case, the small compressor is necessary to save amps.? When running my pneumatic gates and some machines and dust collection, I don't need a hard starting 5 hp motor coming on at a bad time and kicking out the circuit or the Phase Perfect.? If just using
air for light usage, not filling the 100 gal tank and even firing up the PP is convenient.? I think I paid about 400 for a used Jun Air and a few valves so not a lot of expense.? I don't back fill the big tank with the Jun Air but it runs way more often than
the larger compressor for the stuff I do.? Dave
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I read all through this and still don't understand what the advantage is to adding a small compressor. A pancake wont add significant capacity.? Cycling a 5 or 10-hp motor at intervals isn't a big deal.? Besides all that, the 2 compressors would turn on
and off at different pressures so one would always shut off last (unless they shared the same switch).? I assume the small unit would be set higher but why?? Would there be a check valve on the large compressor reservoir to save the small from charging it??
Or am I wrong to assume 2 reservoirs?? What am I missing?
|
Re: X-Roll Festool quick clamp adapter T nuts
#diy
Hi Mike,? This is creatively elegant yet simple. I'm not in the position to purchase pneumatic clamps at this time, but I do have access to a 3D printer. I would love to give this a try on my K500S with X-Roll. Thanks for offering to send the print file, you can PM to me.? I like the idea of starting?#3D_Print (newb opinion) Matt
|
Re: Air Compressor Big and Small- David Kumm Style
I read all through this and still don't understand what the advantage is to adding a small compressor. A pancake wont add significant capacity.? Cycling a 5 or 10-hp motor at intervals isn't a big deal.? Besides all that, the 2 compressors would turn on and off at different pressures so one would always shut off last (unless they shared the same switch).? I assume the small unit would be set higher but why?? Would there be a check valve on the large compressor reservoir to save the small from charging it?? Or am I wrong to assume 2 reservoirs?? What am I missing?
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Joe Jensen
imran
PK
Jonathan Smith