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LeoDuhVinci

Da Vinci 1.0 Fan Mount

by LeoDuhVinci Jan 13, 2015
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Should I wire my fans in series or in parallel? Not sure what is better Series or parallel?

This may be the answer I was looking for, I am printing PLA with E3D v6 with a layer fan. The side where the fan is does not warp, the back side does. This may help get the air to the back.

Which is the 12 volt cable from the power supply. There's too many and i dont know how to tell their difference.

How are you guys taking the two power cables for the fans and connecting them to one power source? I am a new to wiring and would just like to connect to a external power source. I cant find any kind of fan connector or anything so that I can power the two fans on one wall plug. Also if I were to put in a switch, would I need to cut the wires and add it in that way or is there a way to plug one in somehow.

I may be a little confused on one comment, unless they keep upgrading the printer. Just picked up a 1.0A and there is a fan mounted right on the extruder ... guessing not always the case ?

Yeah, I guess not. I haven't been keeping up with the Da Vincis, but it's good to hear they have fans now.

hello you put the fan in the two hole ?

hello
you have please schema or photo cable connection in the motherboard details ?
tancks

Sorry, I don't. I ended up selling my machine so I can't take any pics for you.

Going to making some of these soon. Will also be looking at filtering like some of the comments. Probably go with filtering on both sides using Fan Filters from Xoxide. They have some really nice aluminum 80mm filter grills.

I love this design. I wanted to know if I could remix this with a couple changes for the outgoing side to have a carbon filter.

If you are interested in filtering, check out Amazon or head over to Xoxide http://www.xoxide.com/lascutfangri.html

Thanks! And yeah, absolutely! As long as you're cool editing the STL files (since I don't have any CAD files), you're welcome to do whatever you like with it.

What RPM are your fans running at? I've just printed 2 of these mounts and mounted the fans. for both sides. I've yet to test but I'll post a make in a few minutes. my fans came with an adjustable RPM switch. 1500, 2000 or 2600 RPM.

I would do some tests to see what works for you. Mine run at 1600 RPMs at max speed, so I ran them like that. More important would be the CFM since different fans push different amounts of air at the same speeds. Mine are rated at 43 CFM at max speed.

The specifics will probably depend on ambient air temperature too. If your room is colder, a slower speed would be better. Hotter would need faster speed, etc.

My room gets very hot thanks to my PC and the 3D printer running. The fans run at 20 CFM for 1500, 25 for 2000, and 34 for 2600. I also have them rigged up to a PC power supply to make it easier to run.

You have your fans blowing in, correct? I was wondering how well it would work if they blew outwards as exhaust fans with a dust filter of some sort on the other side. I am also wondering if there is a way to turn them on and off with the Repetier firmware. We would need to find an available MCU pin... hmmm

Great design by the way!

Thanks! And yeah, mine are blowing inward.

How efective would it be if you had one as the exorst and one blowing air it would make a sort of vortex inside ??

I don't think that would work terribly well. The fans struggle to get air to the far side of the platform already.

If you wanted to do something along those lines, I would suggest printing out 2 brackets, and mounting fans for intake on one side and exhaust on the opposite side of the case. If you wanted to only use 2 fans, it would probably be pretty effective with only one fan in each bracket, but put them diagonally across from each other so one is mounted towards the front and the other towards the back.

But ideal scenario would be at two intake fans on one side, and at least one exhaust on the other side.

hmm... I've just printed one and installed it. I can confirm that it does miracles with layer resolution but my overhangs still look like garbage... maybe 220 degrees is just to hot for my extruder... trying 210 now

Cool, lemme know how it works out! I'm really excited that it helped with the layer resolution for someone else and that it just wasn't some crazy fluke.

Do you have a fan mounted on your extruder yet? I'll post a design later tonight for a fan duct that fits on the back of the extruder stepper and shoots air underneath to the print with a 50mm fan. It has some wicked bridges on it, but I was able to print it just fine with an extra fan in the case pointed at the print.

I didn't get to try out a print with it - I fried my motherboard with a short before i got to try it out. But I'll put up the design anyway so you can see it.

no I don't have a fan on the extruder yet. let me know when you have the model ready and ill give it a try.

Da Vinci Extruder Mounted Fan Duct

"Although, to be fair, this is just the latest in a series of adjustments I've been making to this machine" Care to share what other adjustments you've made?

I know other people have been replacing their bearing mounts and Z rod pillow blocks with sturdier printed versions, but so far mine have seemed just fine and I haven't had to touch them.

Sure! The two big ones were shimming up the glass build plate so it would stop sliding around in the frame (using credit card shims and razor blades), and adding an extra tensioner to my X belt because it was so loose even at the tightest position (fashioned from a bent paper clip).

Beyond that... let's see. I added some glue to the bushings at the top left Y carriage, and the bottom right Z carriage, added these fans, mounted a spool in direct line with the back of the printer so the print head had the least amount of resistance when feeding, and just yesterday I added a new nozzle with heatsinks, thermal grease, and a fan shroud to print PLA.
And then last night I shorted out my power supply and fried my machine. I wouldn't recommend that last one. :)

If I remember anything else I did, I'll mention it here.

It looks like just one set of fans isn't sufficient cooling for PLA. The PLA frog I have printing right now is curling on the overhangs pretty wildly.

I'm gonna try adding a ducted cooling fan cool under the print head and see how it goes.

could you mod it to run the fan cables to the inside of the printer?

Yeah, there's a potential spot in the base of the shroud to the outer edge of each fan that would allow a cable through if I added a hole. It's one of the things I'll add if I ever have time open this file back up.

Can you explain why the print gets better? I would expect it to get worse, because the temperature difference between the air flow and the extruder temperature would cause excessive warping. Some machines go to great length to avoid a cold draft in the build chamber. Any observations?

Howdy sir - take a look. I just added some pictures of the frog prints. That silhouette shot really shows off how much of a difference this made!

I don't know if you've seen this one, but take a look at this - http://www.thingiverse.com/thing:202798

That was what inspired me to try this in the first place. Those aren't the prints that I did, but my experience with my test was almost exactly the same, even though the link is printing in PLA and I'm printing ABS.

PLA frogs with and without cooling fan (experiment)

I was wondering the same thing myself. I haven't tested this on a large print yet, but I have a theory: My guess is that this will be beneficial for small prints, but counter-productive for large prints.

Small prints (less than a 2"-3" bounding box) allow the heat to build up excessively, which means mushy plastic. Cooling the print means more rigid plastic and better overhangs. And on this scale, the warping due to the temperature differential is relatively minimal - not significant enough to affect the print, at least.

I suspect that on larger prints, the fan will still improve overhangs and layer alignment, but I imagine it will also exacerbate warping. I'm going to try printing another fan mount soon to see if this theory holds up - it warped a lot the first time I printed it, so it'll be interesting to see how it works with the fans in play.

I'll also post some photos of the two comparisons I've done with the fans. The 1st was that popular tree frog model, and the 2nd was the built in Demo print of the printer (just finished a few minutes ago). In both prints, the difference is dramatic. Every single aspect of the cooled prints look better. I don't have photos yet because I'm going to have to set up some careful lighting to show off the difference - the prints are natural ABS which is too translucent to photograph nuance well.

Cheers!