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  #31  
Old Thu 17 September 2009, 17:57
WTI
Just call me: James
 
Detroit (Michigan)
United States of America
Not to extend this thread into infinity, but 120 gph was used because of the realistic output of the pump in the above cooling kit.
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  #32  
Old Thu 17 September 2009, 20:48
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Quote:
Originally Posted by WTI View Post
. . . .The loss from one 90 degree bend is approximately 0.5*Pd, . . .
When numbers like that are mentioned, they normally relate to 90 degree "elbows" where the bend radius is quite sharp....something like the bend radius being equal to about 2x the pipe diameter. With our hoses, the bend radius is about 20 to 30 times the pipe diameter.

I personally don't like the idea of mounting the whole cooling system on the gantry:
- having the whole water system (with higher leak potential) over the workpiece seems to invite a ruined board
- extra mass for the stepper motors to move around
- the engineering calcs/experiments show no real benefit in shortening the hoses.

The simpliest KISS method would be to connect the water hose to a tap/faucet and let the outlet run to the garden . . . . . .
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  #33  
Old Tue 22 September 2009, 20:36
larry1larry
Just call me: larry
 
toronto
Canada
I personally don't like the idea of mounting the whole cooling system on the gantry:
- having the whole water system (with higher leak potential) over the workpiece seems to invite a ruined board"The simpliest KISS method would be to connect the water hose to a tap/faucet and let the outlet run to the garden

Confucious say man with leaky spindle get shock
Confusious say man with water cooled spindle got heated swimming pool
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  #34  
Old Mon 09 November 2009, 18:28
Radishworks
Just call me: Mike #40
 
California
United States of America
Sorry I've been away for a while. I had a little trouble with the first Swiftech MCP355 that arrived - it was full of blue smoke ;-). I returned it to Swiftech and their customer service was kind enough to send me a replacement.

Attached is a picture of the final installation. I found a nice little liquid reservoir at my local auto parts store ($15). I'm using about a 50/50 mix of (environmental safe) anti freeze and water. The hoses are 5/16" and run through all the cable chains, gantry and water cooled router. I haven't measured the flow, but it appears to meet the beer glass test. Since I have the temperature meter on the system, circled in red in pic #2, I should be able to monitor the temp. If needed a small radiator under the table should work nicely.

I haven't started cutting yet, but so far I'm pretty happy with this little pump. A bonus is that its runs totally silent, not that that matters when cutting.

More later, Iím getting close to making dust!
Attached Images
File Type: jpg PumpSystem.JPG (79.2 KB, 760 views)
File Type: jpg ControlBox.JPG (39.9 KB, 754 views)
File Type: jpg Router.JPG (82.0 KB, 756 views)
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  #35  
Old Mon 09 November 2009, 22:21
ifffff
Just call me: Ivo #38
 
Parnu
Estonia
Mike i have almost same system as you - from car reservoir and aquarium pump. So far looks it dont need extra radiator. Cooling liquid tubes what are in cable chains have enough cooling space (about 22 meter tube). But havent tried yet bigger cutter when 6mm dia.
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  #36  
Old Tue 27 September 2011, 05:18
paul60
Just call me: woodguy
 
st george
Barbados
coolant

I need to get some information on the correct collant to use.
i live in the tropics where the temperture never goes under 75 deg.
should the antifreeze be used full strength or 50/50
at the moment i am using it full strength.
i use a clear plastic hose. and that has now turned brown [green antifreeze]
the inside of the hose has this brown sticky flim coating.
is this normal?
thanks paul
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  #37  
Old Tue 27 September 2011, 08:20
KenC
Just call me: Ken
 
Klang
Malaysia
We don't need to anti-freeze... anti-rust is all we required...
I started with 100% coolant & found out it is to viscous to go through the tiny tube,. Then I tried 80/20, then 70/30, then 60/40... & eventually I just pour a 1 liter coolant into the coolant tank almost 3/4 filled & runs happily ever after. I've only top up the coolant tank once with tap water since then.
No problem with goo inside the tubing but I can't tell as my tubes are opaque.
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  #38  
Old Wed 28 September 2011, 11:14
danilom
Just call me: Danilo #64
 
Novi Sad
Serbia
I also had some brown sticky stuff inside the tubes after running, ran it no problems for couple of months and washed it out, changed the liquid no problem now.
It must be some grease that was inside the channels in the spindle.
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  #39  
Old Thu 29 September 2011, 04:26
paul60
Just call me: woodguy
 
st george
Barbados
coolant

thanks for the information.
i washed it out and replaced the antifreeze so i will how it goes
thanks
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  #40  
Old Wed 05 October 2011, 19:34
dragonfinder1
Just call me: Dave #49
 
Astoria, Oregon
United States of America
noise

I'm going to get a 2.2kw spindle water cooled. My question is not on cooling, but rather noise. These little guys run 10-24K rpms. I'm looking for something that is a lot quieter than my Milwaukee 3hp. The fan on the Milwaukee isn't loud, but the out of balance router motor is. I have two motors to swap out when the bearings need replacing an have run the spare on the floor and it's pretty quiet, put in the MM and it it very loud, makes it appear it's the fan.

Anyway, how's the noise level of the Chinese spindles?

Dave
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  #41  
Old Wed 05 October 2011, 22:40
KenC
Just call me: Ken
 
Klang
Malaysia
whispering... when not cutting
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  #42  
Old Wed 05 October 2011, 22:53
Kobus_Joubert
Just call me: Kobus #6
 
Dalview
South Africa
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Well said Ken. When doing 3D carving with a 3mm ballnose it is STILL whispering.
I went for the Air cooled...less hassle..no water no pipes no pumps...and still whispering.
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  #43  
Old Fri 03 February 2017, 19:24
st_indigo
Just call me: Philip.X.Diaz #123
 
Los Angeles, CA
United States of America
Reviving an old thread here to share my new improved water cooled spindle setup.

I went to Fry's Electronics and purchased a "LEPA Exllusion 240" liquid CPU cooler. It's an all-in-one dealy with a radiator, 2X muffin fans, and a reservoir with a CPU heat exchanger. Cost was about $130.

All I had to do to make it work with my spindle was cut a tube between the CPU heat exchanger/reservoir and the radiator and install 2X tubing adapters to step down the diameter from the cooler tubes to the tubing on my spindle. I epoxied the radiator and reservoir to my Y-car. Power comes from the 12v power supply brick I have tucked inside the Y-car.

It's been about 9 months and everything is still working. The only upkeep necessary is blowing out the dusty radiator with compressed air every so often.

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  #44  
Old Sat 04 February 2017, 05:57
jhiggins7
Just call me: John #26
 
Hebron, Ohio
United States of America
Philip,

I was wondering if a CPU cooler would work. Thanks for posting this.

Are your muffin fans mounted as shown? Also, have you measured the temperature of your spindle after it's been running for awhile (say with a temperature gun) to make sure it's staying cool enough?
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  #45  
Old Sat 04 February 2017, 09:19
st_indigo
Just call me: Philip.X.Diaz #123
 
Los Angeles, CA
United States of America
It works great! I've run the spindle for hours and it barely gets warm to the touch. Putting my hand next to the radiator, I can feel warm air. The setup works incredibly well.

The fans are mounted exactly as shown. I am holding it in the photo because I hadn't expoxied the radiator yet, but that's where it ended up.
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  #46  
Old Sat 04 February 2017, 09:28
danilom
Just call me: Danilo #64
 
Novi Sad
Serbia
10L bucket 50/50 water/antifreeze , never had a heating problem on 10+ machines with these spindles
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  #47  
Old Mon 06 February 2017, 03:44
Tom Ayres
Just call me: Tom #117
 
Bassett (VA)
United States of America
I have a similar set up that has worked for a couple of years now, I do keep a backup pump on hand, the first one (from china) I had died in 3 months (but it was super cheap)
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  #48  
Old Thu 27 April 2017, 22:30
IamDave
Just call me: Davey
 
Ball Ground, GA
United States of America
Thanks for the coolant recipe I was wondering what needed to be used.
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