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Re: Another filament cooling mod

Posted: Fri Jul 25, 2014 12:47 pm
by JuliaDee
printmo wrote:
mb20music wrote:
JuliaDee wrote:I think it is easier to get 12V for a fan from the connectors on top of the print head than to use the 20V from the back of the printer. There is plenty of power available on the 12V.

Well, that was what I was planning to do, but I found that the 3 pin connection on the right side of the top of the print head didn't have any juice.
Maybe both fans on the same connector?
Yes.

Re: Another filament cooling mod

Posted: Fri Jul 25, 2014 2:24 pm
by D3rax
True, but what I like is the fact that this way its very easy to unplug the fan and remove the pla mod when needed + if i'm not mistaken, with the voltage regulator you can slightly increase the fan speed by slightly reasing the voltage (not to much of coarse...)

Re: Another filament cooling mod

Posted: Sat Jul 26, 2014 3:06 pm
by mb20music
D3rax wrote:@mb2music, which one of these would you recommend for a step-down regulator? http://www.dx.com/s/voltage+step-down
I like the second one in the top row, the one with the digital voltage display. The ones I have do not have the voltage displayed so I had to use a voltmeter to check the output voltage when adjusting.

I also like that one because it has screw terminals so you don't have to solder the wires.

Re: Another filament cooling mod

Posted: Sat Jul 26, 2014 3:11 pm
by mb20music
roller wrote:
mb20music wrote:Might want to try this http://www.thingiverse.com/thing:397270. I was inspired by the mod by "printmo", I used one of the .stl files he posted on Thingiverse and modified it slightly. Thanks again printmo for uploading the file!

It has been working quite well for me. I have found that it is keeping the stepper motor around 50 degrees cooler.
What's your ambient temp in the room and how long are printing on this mod. I found the stepper temp easy to hold down initially but once the gradient climbed I could not get the heat away fast enough. 90min prints were ok but after two hours I still ended up over temp. But my ambient temp was also usually 25C degrees.

Ok, I just finished a 5 hour PLA print (room temperature approx. 75F) with the mod and it printed great with zero issues. The brand of PLA might make a difference. I have only tried one brand of PLA, in two different colors and both are working great. Bought the PLA filament on eBay from seller "Chipmall".

I think what is making the mod work is the large 50mm fan for the increased airflow as opposed to the dinky 40mm fan.

Re: Another filament cooling mod

Posted: Sat Jul 26, 2014 3:19 pm
by mb20music
D3rax wrote:Could try it, but its basically the same mod as I'm using now.....

One thing I'm very interesting in though is how you have used the power outlet on the back of the printer. I had this idea a while ago http://www.pp3dp.com/forum/viewtopic.php?f=18&t=4979. Can you put some details on how to set this up?

Is the Mod you are using now utilizing a 40mm fan? that might be the problem. The larger 50mm fan I think is the key.

Re: Another filament cooling mod

Posted: Sun Jul 27, 2014 4:04 pm
by D3rax
Yes im using a 40 mm fan. Did you midify yor cooler to a 50 mm fan? Because the iriginal one was 40 mm right?

Re: Another filament cooling mod

Posted: Sun Jul 27, 2014 5:28 pm
by printmo
The diameter of the fan is not the only parameter, the power (airflow) is crucial as well. Use a high power 40 mm fan to increase the print time. In my case I used a 5800 rpm fan (12 m^3/hr or 7 CFM) and achieved a print time of approx 7 hrs @ 27° C or 81 F ambient with Innofil3D PLA filament.

Re: Another filament cooling mod

Posted: Mon Aug 04, 2014 3:34 pm
by mb20music
D3rax wrote:Yes im using a 40 mm fan. Did you midify yor cooler to a 50 mm fan? Because the iriginal one was 40 mm right?

Yes, I am using a 50 mm fan. The duct I uploaded on Thingiverse is designed to utilize a 50 mm fan.

Re: Another filament cooling mod

Posted: Mon Aug 04, 2014 5:59 pm
by D3rax
I think i'll need to try a 50 mm fan as well. I also have another idea for making pla printing possible, dont know if its worth trying though....

http://www.pp3dp.com/forum/viewtopic.php?f=18&t=54310