Liquid cooling for everyone

Kurtyard
Posts: 24
Joined: Tue Jul 04, 2017 9:55 pm

Re: Liquid cooling for everyone

Postby Kurtyard » Sun Aug 30, 2020 10:04 pm

You're right, we have to prevent the filament from freezing, ha ha. Were there images made with heat camera showing the heat distribution without liquid cooling?

Markus64
Posts: 192
Joined: Thu Feb 27, 2020 4:57 pm
Location: Germany

Re: Liquid cooling for everyone

Postby Markus64 » Mon Aug 31, 2020 11:59 am

Kurtyard wrote:You're right, we have to prevent the filament from freezing, ha ha. Were there images made with heat camera showing the heat distribution without liquid cooling?


@Kurtyard,
I had asked for pictures like this, but either nobody could or would share the pictures.

KaneTW
Posts: 10
Joined: Sat Sep 05, 2020 2:57 am

Re: Liquid cooling for everyone

Postby KaneTW » Sat Sep 05, 2020 3:00 am

If there's a group buy in Germany, I would be potentially interested---looking at Raise3D printers right now.

How severe are the issues? Would you recommend other printers (and if so: which?) in the same price/size category? Or is this something that comes with the price region?

akoetzle
Posts: 12
Joined: Tue Jul 28, 2020 1:50 pm

Re: Liquid cooling for everyone

Postby akoetzle » Sun Sep 06, 2020 8:35 am

First try with PLA and LC....
Nozzle has 205°C and i can touch the heat exchanger. It is cool. :D
Attachments
IMG_20200906_102900.jpg

Markus64
Posts: 192
Joined: Thu Feb 27, 2020 4:57 pm
Location: Germany

Re: Liquid cooling for everyone

Postby Markus64 » Sun Sep 06, 2020 9:22 am

Well done Andreas! Welcome to the club! :mrgreen:

akoetzle
Posts: 12
Joined: Tue Jul 28, 2020 1:50 pm

Re: Liquid cooling for everyone

Postby akoetzle » Sun Sep 06, 2020 9:29 am

Haha.. Thanks @Markus64, :lol:
... waiting for my LC Plate :D

Kurtyard
Posts: 24
Joined: Tue Jul 04, 2017 9:55 pm

Re: Liquid cooling for everyone

Postby Kurtyard » Sun Sep 06, 2020 2:28 pm

akoetzle wrote:First try with PLA and LC....
Nozzle has 205°C and i can touch the heat exchanger. It is cool. :D

Perfect!!! How did you do the routing of the hoses on the outside? I‘m planning to route them to the bottom, somehow...i will put the cooling onto a drawer beneath the printer, not to change the xy dimensions of the system. Not shure if it works, hope to manage the cooling beeing nearly invisible and automatic on/off with the printer via SSR.
@Markus64: meanwhile i got the cooling blocks, made a throat tube testmount- i had to tighten the screw very strong to fix the throat tube. Have you got the same experience with your units? The remaining slit is very small, maybe it is normal behaviour. I didn‘s use heat sink compound yet, might be the difference here. Btw, difficult to find a compound which lasts 300C permanently.

Regards Volker

Markus64
Posts: 192
Joined: Thu Feb 27, 2020 4:57 pm
Location: Germany

Re: Liquid cooling for everyone

Postby Markus64 » Sun Sep 06, 2020 2:50 pm

@Kurtyard,
with my heat exchangers, it is sufficient to tighten the screw slightly for a perfect hold. Has the 6h7 fit been carried out correctly on your heat exchangers?

akoetzle
Posts: 12
Joined: Tue Jul 28, 2020 1:50 pm

Re: Liquid cooling for everyone

Postby akoetzle » Sun Sep 06, 2020 5:35 pm

Kurtyard wrote:I didn‘s use heat sink compound yet, might be the difference here. Btw, difficult to find a compound which lasts 300C permanently.

Until now i don't thought about that. I use only a very thin layer of heat sink compound from my CPU.
But if you search, you will find for example:
Thermal Grizzly TG-K-001-RS Kryonaut 12,5 W/m · K 1 g Wärmeleitpaste (-200 bis 350 °C)
But the fiting without the compound was very good. You can see the slit on my picture.

My hoses are long enough outside the printer to set the pump beside or above it. Until now i don't want to drill some holes in the printer. Therefor the hood is set on 4 spacers.

Regards Andreas

Markus64
Posts: 192
Joined: Thu Feb 27, 2020 4:57 pm
Location: Germany

Re: Liquid cooling for everyone

Postby Markus64 » Sun Sep 06, 2020 6:03 pm

@All,
from my point of view there is no need to worry about the heat resistance of thermal grease. Due to the heat sinks, the temperature on the throat tubes does not reach critical values. This is best shown in the pictures with the thermal imaging camera. There is a picture where the measuring point is exactly above between the hotends. If there were 300 ° C at the thermal transition point, water cooling would not be required because it would not work! 8-)

Kurtyard
Posts: 24
Joined: Tue Jul 04, 2017 9:55 pm

Re: Liquid cooling for everyone

Postby Kurtyard » Sun Sep 06, 2020 8:59 pm

Agree, good point! I will use the Noctua NT-H1 - very durable and less stiff than Thermal Grizzly. After running into intermittend speed issues of the front fan i‘m looking forward to a by far more professional solution than tiny heatsinks with cheap and undersized front fan.

Kurtyard
Posts: 24
Joined: Tue Jul 04, 2017 9:55 pm

Re: Liquid cooling for everyone

Postby Kurtyard » Sun Sep 06, 2020 9:09 pm

Markus64 wrote:@Kurtyard,
with my heat exchangers, it is sufficient to tighten the screw slightly for a perfect hold. Has the 6h7 fit been carried out correctly on your heat exchangers?

I measured 6.03mm max, so it‘s 6H9 - it‘s just ok, i can fix it with the screw - but the torque is high - luckily the thread lenght is sufficient and can deliver this torque.

Markus64
Posts: 192
Joined: Thu Feb 27, 2020 4:57 pm
Location: Germany

Re: Liquid cooling for everyone

Postby Markus64 » Thu Sep 10, 2020 2:24 pm

Update:
After the water cooling of the extruders worked perfectly, I decided to include the extruder motors in the cooling circuit as well. The heat exchangers are intended for a different printer, but fit the stepper motors of the Pro2. Price per piece around $ 10, made of copper. I have ordered the parts and expect delivery by mid-October. This is followed by pictures of the installation and links to the seller. Only a few adjustments to the existing design are necessary.

Kurtyard
Posts: 24
Joined: Tue Jul 04, 2017 9:55 pm

Re: Liquid cooling for everyone

Postby Kurtyard » Tue Sep 15, 2020 3:07 pm

Cooling base is finished, i chose a flat design as i am going to put it on a drawer beneath the system. Flow control works, i won't use the internal hall switch for control, i added some leds for a quick visual check. Pump and fan (16db) noise is hard to recognize - really low noise.
To make the flow control working i inserted a small pipe and reducer just in front of the blades. The unit on/off is controlled by USB output of the printer.
https://youtu.be/dwEN5rofROc
Attachments
20200915_160854.jpg
20200915_160838.jpg

Markus64
Posts: 192
Joined: Thu Feb 27, 2020 4:57 pm
Location: Germany

Re: Liquid cooling for everyone

Postby Markus64 » Tue Sep 15, 2020 3:48 pm

Good work! I like your unit very much! How far are you with the rest of the work?

Kurtyard
Posts: 24
Joined: Tue Jul 04, 2017 9:55 pm

Re: Liquid cooling for everyone

Postby Kurtyard » Wed Sep 16, 2020 11:21 am

Not far, still sorting out a good tubing material from base unit to hotend. I received poor material so far, ordered now 3 different Brands. I consider a replacement on a regular base, anyway.


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